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Environmental Technology Research Network
in the Asia-Pacific Region

DB for Research Project
Category(1) : Air
Category(2) : Reaction mechanism


  1. Project Name
  2. Duration
  3. Research Catagory 1
  4. Research Catagory 2
  5. Research Field
  6. Researchers
  7. Affiliation 1
  8. Affiliation 2
  9. Address
  10. Country
  11. Phone
  12. Fax
  13. Project Summary
  14. Publications
  15. International Joint Study with

Korea Institute of Energy Research(KIER), Korea

  1. Development of Gas Decomposition Technology Using Microwave Energy
  2. 1994-1996
  3. Air, Hazardous Substances(SOx,NOx,etc.)
  4. Reaction Mechanism, Gas Decomposition Process Development, countermeasures
  5. Chemical Engineering
  6. Dae-Hyun SHIN, Woo-Young SONG, Jae-Kyung WOO, Dong-Chan KIM, Sang-Guk KIM, Nam-Sun ROH, Kwang-Ho KIM, Gye-Shik KANG
  7. Wastes Pyrolysis Research Team, Energy&Environment Research Department
  8. KIER(Korea Institute of Energy Research), MOST(Ministry of Science and=Technology)
  9. 71-2 Jang-dong, Yusong-ku, Taejon 305-343
  10. Korea
  11. 82-42-860-3630
  12. 82-42-860-3134
  13. The objective of this study is to develop a process using microwave energy, by which various hazardous gases generated in industrieas can be treated. Especially, the primary target of this study is to develop a dry process by which NOx and SOx can be treated simultaneously from stack and to develop a process by which hazardous gases such as halogen compounds, HCN, H2S, etc., generated in chemical process, can be treated.
  14. 1) Dae-Hyun Shin et al., Pyrolytic Incineration of Plastics and Heat Recovery, Proceedings of Energy Reservation Technology Workshop, Nov.2-4,Yusong Hotel,Taejon,pp.291-304,1995
  1. Study on the production of alternative fuels by carbon dioxide hydrogenation
  2. 1993-1996
  3. Global change, air, energy
  4. Countermeasures, Reaction mechanism
  5. Chemistry
  6. Kyu-Sung SIM, Sang-Do HAN, Jong-won KIM, Youn-Soon Kim, Ki-Bai Park
  7. Clean Fuel Res. Lab
  8. KIER
  9. 71-2, Jang-dong, Yusong-ku, Taejon 305-343
  10. Korea
  11. 82-42-860-3017
  12. 82-42-860-3302
  13. The aim of this study is the development of technologies of the fuel production from carbon dioxide by catalytic hydrogenation. These chemical fixation methods will help to reduce carbon dioxide emission, which is known as the main reason of global warming.
  1. Development of 2-Staged Low Emission P.C. Combustor
  2. 1994-1997
  3. Global change, Air
  4. Reaction mechanism
  5. Engineering (Combustion)
  6. SHON Eung-Kwon, Lee Shi-Hyun, HYUN Ju-Soo, PARK Chu-Sik, RHIM Young-Jun, KIM Sung-One
  7. Low Emission Combustion Research Team, Energy Conversion Research Dept.
  8. KIER
  9. 71-2, Jangdong, Yusungku, Taejon, 305-343
  10. Korea
  11. 042-860-3457
  12. 042-860-3302
  13. The objective of this study is development of low emission pulverized coal combustor for reduction of pollutant emission from coal combustion system. The pollutants from pulverized coal combustion systems are fly-ash and NOx, SOx. This study was done as followings for reducation of such atomospheric pollutants. 1) Staged combustion by using fuel staging and air staging was studied for Nox reducation. 2) High temperature slagging combustion was studied for fly-ash removal in combustor. 3) Absorbing SOx in high temperature flue gas by using limestone was studied. 4) Gas reburning technology will be studied for clean coal combustion.

National Institute of Bioscience and Human Technology(NIBH), Japan

  1. Microbial ecology on the emission of volatile organic compounds
  2. 1995-1997
  3. air, global change
  4. reaction mechanism, fate
  5. biology
  6. Takahiro KANAGAWA, Yoichi KAMAGATA
  7. Microbial Population Dynamics Laboratory, Applied Microbiology Department,
  8. NIBH, AIST, MITI
  9. 1-1 Higashi, Tsukuba, Ibaraki 305
  10. Japan
  11. 81-298-61-6026
  12. 81-298-61-6009
  13. The aim of this study is to reveal the role of microorganisms in the environment related to the production of methane, methanethiol or carbonyl ulfide

Electrotechnical Laboratory(ETL), Japan

  1. Photodissociation Rates of Atmospheric Trace Gases
  2. 1993-1996
  3. global change, air
  4. reaction mechanism, fate
  5. chemical physics
  6. Isao H.Suzuki, Masaki Koike
  7. Radiation Metrology Section, Quantum Radiation Division
  8. ETL, AIST, MITI
  9. 1-1-4 Umezono, Tsukuba-shi, Ibaraki 305
  10. Japan
  11. 81-298-61-5663
  12. 81-298-61-5673
  13. The aim of this study is to estimate photodissociation life times of atmospheric trace gases at several altitudes because these gases make some effect on an increase in the global temperature. Photoabsorption cross sections of the gases have been measured and intensities of solar ultraviolet radiations were calculated.
  14. 1) Isao H.Suzuki and M.Koike, Absolute photoabsorption cross sections of atmospheric trace gases, Abstracts.11-th Int.Conf.VUV Phys.(Tokyo,1995) Tu 09.

National Institute for Resources and Environment(NIRE), Japan

  1. Research on characterization of PSCs (polar stratospheric clouds) and their heterogeneous interaction with halogen reservoir molecules
  2. 1996-1998
  3. global change, air, atmosphere, stratosphere, aerosol, trace gas
  4. characterization, reaction mechanism, fate
  5. chemical physics, phase transformation, spectroscopy, reaction mechanism
  6. Masaru SATO, Hiroshi IZUMI, Osamu SETOKUCHI, Sadao MATSUZAWA, Yukio SHIMIZU, Ikuo TAMORI
  7. Excited States chemistry Div., Atmospheric Environmental Protection Dept.
  8. NIRE, AIST, MITI
  9. 16-3 Onogawa, Tsukuba, Ibaraki 305
  10. Japan
  11. 81-298-61-8264
  12. 81-298-61-8258
  13. Heterogeneous conversion of halogen reservoir molecules to active species on the surface of PSCs (polar stratospheric clouds) aerosol is thought of the most impotant role for antarctic and arctic ozone hole. In this research, we produce modeled PSCs in equibalent tempereture and pressure of polar stratospheric winter and characterize them. Thereafter, modeled PSCs will be compared with remote sensing data of ILAS instrument which will be installed in ADEOS satelite following by diagnose satelite arosol data. We also will be measure heterogeneous reactions on modeled PSCs.
  14. 1) Masaru SATO, Hiroshi IZUMI and Sadao MATSUZAWA, Infrared Spectra of Modeled Polar Stratospheric Clouds (PSCs) Films (in Japanese), Dai 6 kai Taikikagaku Shinpojiumu, STE Nagoya University (Toyokawa), 106-109, 12/21/1995-12/22/1995
  1. Characterization and photochemical ractions of organic compounds in aerosols
  2. 1995-1997
  3. air, atmosphere, hazardous substances, particles
  4. characterization, reaction mechanism, measurement, fate
  5. chemistry, physical chemistry, mass spectrometry, reaction mechanism
  6. Takesige WAKABAYASHI, Yukio SHIMIZU
  7. Excited States chemistry Div., Atmospheric Environmental Protection Dept.
  8. NIRE, AIST, MITI
  9. 16-3 Onogawa, Tsukuba, Ibaraki 305
  10. Japan
  11. 81-298-61-8260
  12. 81-298-61-8258
  13. Detection and analysis of organic compounds on aerosols and find processes of their fate in the atmospheric environment.
  14. 1) J.J.GAUMET,A.WAKISAKA,Y.SHIMIZU,and Y.TAMORI,Energetics for Carbon Clusters produced directly by Laser Vaporization of Graphite:J. Chem. Soc., Faraday Trans.,89,1667-1670,1993
    2) A.WAKISAKA,J.J.GAUMET,Y.SHIMIZU,Y.TAMORI,H.SATO and K.TOKUMARU,Growth of Carbon Clusters:J. Chem. Soc., Faraday Trans.,89,1001-1005,1993
  1. Transformation processes of volatile chemical substances in the environment
  2. 1996-1999
  3. global change, air, soil
  4. reaction mechanism, fate, remediation
  5. chemistry
  6. Koji TAKEUCHI, Shuzo KUTSUNA, Nobuaki NEGISHI, Hitomi KOBARA
  7. Photoenergy Application Div., Global Warming Control Dept.
  8. NIRE, AIST, MITI
  9. 16-3 Onogawa, Tsukuba, Ibaraki 305
  10. Japan
  11. 81-298-61-8162
  12. 81-298-61-8158
  13. Organic and inorganic volatile substances are transformed in the atmosphere. Photochemical reactions of the volatile compounds are studied to clarify the atmospheric degradation and removal processes.
  1. Electrochemical Studies on CO2 Reduction Catalysis Mediated by Metal Complexes
  2. 1996-1999
  3. global change, air
  4. reaction mechanism, conuter measures
  5. chemistry
  6. Koji TAKEUCHI, Kazuhide Koike, Hisao Hori
  7. Photoenergy Application Div., Global Warming Control Dept.
  8. NIRE, AIST, MITI
  9. 16-3 Onogawa, Tsukuba, Ibaraki 305
  10. Japan
  11. 81-298-61-8161
  12. 81-298-61-8158
  13. This project aims at electrochemically elucidating of reaction mechanism for CO2 reduction catalysis and developing electrochemical CO2 reduction metal complex catalysts
  14. 1) Hisao HORI et al., Efficient carbon dioxide photoreduction by novel metal complexes and its reaction mechanisms, Energy Conv. Management 36, 62, 1995.
  1. Development and Environmental Acceptability Study of New Alternative Chlorofluorocarbons
  2. 1995-2000
  3. global change, air
  4. reaction mechanism, impact assessment
  5. chemistry
  6. Takashi IBUSUKI, Shin-ya YOKOYAMA, Koji TAKEUCHI, Kazuhide KOIKE, Shuzo KUTSUNA
  7. Photoenergy Application Div., Global Warming Control Dept.
  8. NIRE, AIST, MITI
  9. 16-3 Onogawa, Tsukuba, Ibaraki 305
  10. Japan
  11. 81-298-61-8163
  12. 81-298-61-8158
  13. This project aims at developing the experimental methods to evaluate atmospheric lifetime and degradation products of chemical species mainly as the environmental acceptability study of the developing alternative refrigerants such as fluorinated ethers.
  14. 1) Shuzo KUTSUNA et al., Heterogeneous Reactions of Fluorinated Ethers on Allophane and Titanium Dioxide, Proc. Int. Symp. Environ. Impacts of Adv. Alternatives to CFC, Tsukuba, Japan, pp.163-168, 1996
  1. Development of Technology for Removing Air Pollutants by Photocatalysis
  2. 1993-1997
  3. air
  4. counter measures, remediation, reaction mechanism, monitoring
  5. chemistry, material science
  6. Takashi IBUSUKI, Shin-ya YOKOYAMA, Koji TAKEUCHI, Shuzo KUTSUNA, Hitomi KOBARA, Nobuaki NEGISHI
  7. Photoenergy Application Div., Global Warming Control Dept.
  8. NIRE, AIST, MITI
  9. 16-3 Onogawa, Tsukuba, Ibaraki 305
  10. Japan
  11. 81-298-61-8162
  12. 81-298-61-8158
  13. This project aims at developing technically and economically feasible purification methods for ambient air. Photocatalysts based on titanium dioxide were found to remove ppm-level nitrogen and sulfur oxides from air by oxidation. As the catalysts require only near ultraviolet light for activation and water for regeneration by rinsing the oxidation products (nitrate and sulfate) off, the catalysts can be operated outdoor conditions with natural energies only. The reaction mechanisms, improvement of photocatalytic activity, and immobilization of the catalysts are studied in the project.
  14. 1) Takashi IBUSUKI et al., Removal of low concentration nitrogen oxides through photoassisted heterogeneous catalysis, J. Molec. Catal., 88, 93-102, 1994,
    2) Koji TAKEUCHI et al., Removal of nitrogen oxides from air by catalytic oxidation with photoenergy, Shigen to Kankyo, 3(2), 103-110, 1994,
    3) Koji TAKEUCHI, Air-purifying sheets for cleaner streets, Look Japan, 41(12), 24-25, 1995
  1. Japanese Study on the Behavior of Greenhouse Gases and Aerosols
  2. 1990-1999
  3. global change, air, water, ocean
  4. counter measures, reaction mechanism, measurement, monitoring, modeling
  5. chemistry, geophysics
  6. Takashi IBUSUKI, Koji TAKEUCHI, Shuzo KUTSUNA, Kazuhide KOIKE, Hitomi KOBARA
  7. Photoenergy Application Div., Global Warming Control Dept.
  8. NIRE, AIST, MITI
  9. 16-3 Onogawa, Tsukuba, Ibaraki 305
  10. Japan
  11. 81-298-61-8168
  12. 81-298-61-8158
  13. This project aims at conducting research and observation on long-term trend of greenhouse materials and on the material circulation and quantitative analysis of natural balance in order to estimate and predict influence of anthropogenic and natural greenhouse gases.
  1. Study on Chemical Reactions in the Stratosphere
  2. 1995-1997
  3. global change, air
  4. reaction mechanism
  5. chemistry
  6. Takashi IBUSUKI, Koji TAKEUCHI, Kazuhide KOIKE, Shuzo KUTSUNA
  7. Photoenergy Application Div., Global Warming Control Dept.
  8. NIRE, AIST, MITI
  9. 16-3 Onogawa, Tsukuba, Ibaraki 305
  10. Japan
  11. 81-298-61-8163
  12. 81-298-61-8158
  13. This project aims at developing the experimental methods to measure the reaction probability of the heterogeneous reactions of nitrogen species on ice or aerosols under the similar reaction conditions as in the stratosphere.
  1. Development of New Refrigerants , Blowing Agents and Cleaning Solvents for Effective Use of Energy
  2. 1994-1999
  3. global change, air
  4. reaction mechanism, impact assessment
  5. chemistry
  6. Takashi IBUSUKI, Shin-ya YOKOYAMA, Koji TAKEUCHI, Kazuhide KOIKE, Shuzo KUTSUNA, Mitsuhiro TOMA
  7. Photoenergy Application Div., Global Warming Control Dept.
  8. NIRE, AIST, MITI and RITE
  9. 16-3 Onogawa, Tsukuba, Ibaraki 305
  10. Japan
  11. 81-298-61-8163
  12. 81-298-61-8158
  13. This project aims at developing the experimental methods to evaluate atmospheric lifetime and degradation products of chemical species mainly as the environmental acceptability study of the developing alternative refrigerants such as fluorinated ethers. The removal processes through photolysis, dissolution into water droplets as clouds, degradation on solid particles as aerosols are investigated.
  14. 1) M. TOMA et al., Measurement of Uptake Coefficients of Some Acetyl Halides and Fluorinated Ethers into Water, Proc. Int. Sym. on Environ. Impacts of Adv. Alternatives to CFC, Tsukuba, Japan, pp.139-144, 1996.
  1. VOC ( Volatile Organic Compounds ) Decomposition in Plasma
  2. 1994-1996
  3. air, hazardous substances
  4. counter measures, reaction mechanism
  5. chemistry, electrostatics
  6. Shigeru FUTAMURA, Aihua ZHANG, Yukio SHIMIZU
  7. Excited State Chemistry Division, Atmospheric Environmental Protection Department
  8. NIRE, AIST, MITI
  9. 16-3 Onogawa, Tsukuba, Ibaraki 305
  10. Japan
  11. 81-298-61-8266
  12. 81-298-61-8409
  13. The goal of this research is to elucidate mechanisms for plasma chemical decomposition of VOCs and clarify the effects of reaction parameters such as background gas, residence time, field strength, and input energy density on decomposition efficiencies and product distributions. The data obtained to date show that the initial steps for VOC decomposition proceed homolytically via energy transfer from hot electrons in nonthermal plasma media, independent of electron affinities of VOCs. VOC decomposition efficiencies increase with the magnitudes of field strength and input energy density. Active oxygen species partly promote initial VOC decomposition, but its contribution is much smaller than its nonoxidative decomposition. Product distributions are greatly affected by background gas and humidification. Better carbon recoveries and lower organic byproduct yields are obtained due to promoted autoxidation of intermediate radicals derived from VOC docomposition. Water promotes monooxygen transfer in plasma, accelerating alcohol formation from paraffins, epoxidation of olefins, and oxidation of CO to CO2D
  14. 1) Shigeru Futamura, et al., Towards Understanding of VOC Decomposition Mechanisms Using Nonthermal Plasma, Proc., IEEE-IAS Annual Meeting, Orlando, 1453-1458,1995
  1. Catalytic Technology Related to Combustion Exhaust
  2. 1994-1996
  3. global change, air
  4. counter measures, reaction mechanism
  5. engineering, chemistry
  6. Ikuo TAMORI, Koichi MIZUNO, Akihiko OHI, Satoshi KUSHIYAMA, Akira OBUCHI, Atsushi OGATA, Hiroshi YAGITA, Gratian R.BAMWENDA, Junko OI,
  7. Environmental Technology Lab., Atmospheric Environment Protection Dept.,
  8. NIRE, AIST, MITI
  9. 16-3 Onogawa, Tsukuba, Ibaraki 305
  10. Japan
  11. 81-298-61-8273
  12. 81-298-61-8259
  13. This project is an international cooperative study aiming at elucidating surface properties of precious metal loaded catalyst for NOx removal, in particular N2O decomposition.
  14. 1) Atsushi Ogata et. al., Active Sites and Redox Properties of Supported Palladium Catalysts for Nitric Oxide Direct Decomposition, J. Catal., 144, 452 (1994)
    2) Junko Oi et al., Catalytic Decomposition of N2O over Rhodium-Lorded Metal Oxides, Chem. Lett., 1995,453
  15. Institut du Recherches sur la Catalyse and Laboratoire d'Application de la Chimie a l'Environnement, CNRS, France
  1. Catalysis for Lean-burn Gasoline Engines-Catalytic Properies and Reaction Mechanisms-
  2. 1993-2000
  3. global change, air
  4. counter measures, reaction mechanism
  5. engineering, chemistry
  6. Ikuo TAMORI, Koichi MIZUNO, Akihiko OHI, Akira OBUCHI, Atsushi OGATA, Hiroshi YAGITA, Gratian G. BAMWENDA, Junko OI
  7. Environmental Technology Lab., Atmospheric Environment Protection Dept.,
  8. NIRE, AIST, MITI
  9. 16-3 Onogawa, Tsukuba, Ibaraki 305
  10. Japan
  11. 81-298-61-8273
  12. 81-298-61-8259
  13. This project is dedicated to DeNOx catalysis for lean-burn engines, where fuel consumption is less while NOx is emitted in oxygen-rich exhaust.
  14. 1) Akira Obuchi et. al., Selective Reduction of Nitrogen Oxides with Various Organic Substances on Precious Metal Catalysts under a High GHSV Condition, Second Japan-EC Joint Workshop on the Frontiers of Catalytic Science and Technology, p.87, 1995.
    2) G.R. Bamwenda et .al., Selective Reduction of Nitric Oxide with Propene over Platinum-Group Based Catalysts: Studies of Surface Speceis and Catalytic Activity, Appl. Catal. B: Environmental, 6, 311, 1995.
  1. Chemical Conversion/Decomposition of Methane by Catalysis
  2. 1991-1996
  3. global change, air
  4. counter measures, reaction mechanism
  5. engineering, chemistry
  6. Ikuo TAMORI, Koichi MIZUNO, Satoshi KUSHIYAMA, Akira OBUCHI, Atsushi OGATA, Hiroshi YAGITA
  7. Environmental Technology Lab., Atmospheric Environment Protection Dept.,
  8. NIRE, AIST, MITI
  9. 16-3 Onogawa, Tsukuba, Ibaraki 305
  10. Japan
  11. 81-298-61-8273
  12. 81-298-61-8259
  13. Catalytic conversion/decomposition of methane, a constituent of natural gas and one of greenhouse gases, is investigated on dehydrogenative coupling under hydrogen stream, electric activation or photoactivation, where carbon-carbon bonds are formed to give higher hydrocarbons such as ethylene, acetylene, and so on.
  14. 1) Atsushi Ogata et. al., Photoactivation of Methane on Metal Ion-Supported Silica Gel, Chem. Lett., 1995, 1117.
    2) Hiroshi Yagita et. al., Catalytic Dehydrogenative Coupling of Methane at High Temperature on Active Carbon-Effect of Total Reaction Pressure-, Environmental Catalysis, EFCE Pub. Series 112, p.639, 1995.
  1. Microwave-assisted Treatment Technique for Hazardous Organic Air Pollutants
  2. 1996-2000
  3. air, hazardous substances
  4. counter measures, reaction mechanism, other (materials)
  5. engineering, chemistry
  6. Ikuo TAMORI, Koichi MIZUNO, Satoshi KUSHIYAMA, Satoru KOBAYASHI, Atsushi OGATA, Hiroshi YAGITA
  7. Environmental Technology Lab., Atmospheric Environment Protection Dept.,
  8. NIRE, AIST, MITI
  9. 16-3 Onogawa, Tsukuba, Ibaraki 305
  10. Japan
  11. 81-298-61-8273
  12. 81-298-61-8259
  13. Selective adsorption of volatile organic compounds (VOCs) such as benzene and toluene on zeolites from gas mixtures containing water or other hydrophilic substances is controlled by microwave irradiation. Catalysis-assisted plasma decomposition of VOCs and other organic hazardous substances is also investigated.
  14. 1)Satoru Kobayashi et. al., Study of Adsorption Isotherm for Chlorofluorocarbons on Zeolites, Nippon Kagaku Kaishi, 1994, 828.
    2) Toshiaki Yamamoto, Koichi Mizuno, Atsushi Ogata, et. al., Catalysis-Assisited Plasma Technology gor Carbon Tetrachloride Destruction, IEEE-IAS Ann. Conf., 1994.

Hokkaido National Industrial Research Institute(HNIRI), Japan

  1. The research on advanced combustion technology adopting a microgravity environment
  2. 1993-1998
  3. combustion, air pollutant reduction, air, energy
  4. reaction mechanism
  5. engineering
  6. Kunihiro KITANO
  7. Silicon Material Section, Materials Division
  8. HNIRI, AIST, MITI
  9. 2-17 Tsukisamu-higashi, Toyohira-ku, Sapporo 062
  10. Japan
  11. 81-11-857-8462
  12. 81-11-857-8977
  13. The improvement of combustors is the important subject to solve the problem of the global environmental issue. The object of this research is to elucidate the combustion mechanisms of fuel and to establish the clean and efficient combustion technology. The example of research subjects is the emission control of CO2 and NOx from the standpoint of combustion mechanisms. Microgravity environment is adopted to simplify the phenomena of combustion for experimental observation. It is possible to eliminate the effect of natural convection and to make a homogeneous mixture of particulate fuel and air under the microgravity environment
  14. 1)Kunihiro Kitano, Coal Dust Cloud Combustion in a Microgravity Environment, Journal of Japan Institute of Energy 73,1053-1059,1994
    2)Kunihiro Kitano, Coal Gasification, Journal of Japan Institute of Energy 73,459-464,1994
    3)Kunihiro Kitano et al., Estimation of Active Site on Char Particle for Gasification Reaction, The 4th Japan-China Symposium on Coal and C1 Chemistry, Osaka,1993
  15. NASA Lweis Research Center, USA
  1. Research on Deep Sea Sequestering of Carbon Dioxide
  2. 1991-1998
  3. global change, ocean, carbon dioxide. air
  4. reaction mechanism, impact assessment
  5. physics, physical chemistry
  6. Jun'ichi KAWABATA, Sogo SAYAMA, Takeshi OKUTANI, Saburo ITO,Hideo NARITA, Tsutomu UCHIDA
  7. Materials Division,Director of Research Planning, Bioscience and Chemistry Division, Resource Chemistry Section, Resources and Energy Division
  8. HNIRI, AIST, MITI
  9. 2-17 Tsukisamu-higashi, Toyohira-ku, Sapporo, Hokkaido 062
  10. Japan
  11. 81-11-857-8940
  12. 81-11-857-8981
  13. This study aims to develop a new method for the sequestering of CO2 in deep sea as CO2 hydrate. Under the temperature and pressure conditions of deep sea, the mixture of CO2 and water forms the crystalline molecular complex, called CO2 hydrate clathrate. CO2 molecules is enclosed within the lattice formed by water molecules, which are strongly hydrogen bonded with each other. As the density of CO2 hydrate is higher than that of sea water, CO2 hydrate would be sequestered in deep sea. To investigate the feasibility of deep sea CO2 sequestering, it is necessary to study the physical properties of CO2 hydrate. The object of this study are to investigate the formation and dissociation processes of CO2 hydrate and its physical properties.
  14. 1)Tsutomu Uchida et al., Raman spectroscopic analysis of growth process of CO2 hydrates (in Japanese), CO2 taisaku-gijutsu to kiso-kenkyu, Kagaku Kogaku symposium series 38, 125-130, 1993
    2)Tsutomu Uchida et al., Physical data of CO2 hydrate, Direct Ocean Disposal of Carbon Dioxide (ed. by N. Handa), Terrapub. Tokyo (in press)
  15. none
  1. Simultaneous Control Techniques of N2O and NOx from Coal Combustion
  2. 1991-1994
  3. global change, air
  4. reaction mechanism, conuter measures
  5. engineering,
  6. Ryoichi YOSHIDA, Toshimasa HIRAMA, Hideo HOSODA
  7. Thermal Engineering Lab., Resources and Energy Eng. Dept.,
  8. HNIRI, AIST,MITI
  9. 2-17 Tsukisamu-higashi, Toyohira-ku, Sapporo 062
  10. Japan
  11. 81-11-857-8454
  12. 81-11-857-8900
  13. The objectives of this research project are to elucidate the mecha- nism of nitrogen and nitrous oxides (N2O and NOx) formation and to develop new combustion technology for simultaneous control of N2O and NOx emissions from bubbling and circulating fluidized-bed coal combus- tors. The effects of operating conditions, and coal and combustor typeson the emission levels of N2O and NOx have been examined using experi- mental combustors. In addition, catalytic effects of CaO, MgO and hematite particles were examined to reduce the emission levels. Finaly a novel technique for simultaneous reduction of the emissions, the ITS System, has been proposed based on the above experience. The ITS Systemenables us to reduce N2O and NOx emissions respectively by over 85% and 60% in the bubbling fluidized-bed combustor.
  14. 1)Toshimasa HIRAMA et al, Formation and Decomposition of Nitrous Oxide from a Ciculating Fluidized-Bed Coal Combustor, J. of Japan Inst. of Energy, 72, 252-262, 1993
    2)Hideo HOSODA et al., Emission Characte- ristics of Nitrous and Nitrogen Oxides from a Bubbling Fluidized-Bed Combustion and Comparison with the Results from a Circulating Fluidized-Bed Combustion, J. of Japan Inst. of Energy, 73, 128-135, 1994
  1. Advanced Technology for Emission Control of Sulfur and Nitrogen Oxides from Coal Combustors
  2. 1995-1998
  3. global change, air
  4. reaction mechanism, counter measure
  5. engineering
  6. Ryoichi YOSHIDA, Toshimasa HIRAMA, Hideo HOSODA, Kunihiro KITANO
  7. Heat Eng. Sec., Resouces and Enrgy Eng. Div.
  8. HNIRI, AIST, MITI
  9. 2-17 Tsukisamu-Higashi, Toyohira-ku, Sapporo 062
  10. Japan
  11. 81-11-857-8454
  12. 81-11-857-8400
  13. A new combustion system, flue gas recirculation with pure oxygen addition is applied for fluidized bed combustion of coal. The objectives of the research are yto clarify the emissiom mechanisms of nitrogen oxides and sulfur dioxide in the new system, and to develop a new technology for controlling the above gasious emissions.
  14. 1)Hideo Hosoda and Toshimasa Hirama, A Novel FBC Process of Coal for Pure Oxygen Added to Flue-Gas Recycled, under preparation for Australian Coal Science, 1996

Osaka National Research Institute(ONRI), Japan

  1. De-NOx Catalysts for Exhaust Gases of Low Fuel Consumption Engines
  2. 1993-2000
  3. air
  4. counter measures, reaction mechanism
  5. chemistry
  6. Yasuhiro TAKENAKA, Tetsuhiko KOBAYASHI, Atsushi UEDA, Mitsutaka OKUMURA
  7. Catalysis Section, Department of Energy and the Environment
  8. ONRI, AIST, MITI
  9. 1-8-31 Midorigaoka, Ikeda, Osaka 563
  10. Japan
  11. 81-727-51-9656
  12. 81-727-51-9630
  13. The aim of this research is the development of novel catalytic technologies for the removal of NOx emitted from lean-burn gasoline and diesel engines. We have found that gold exhibits good catalytic performances for the reduction of NO with propene in the presence of excess oxygen and moisture when gold is supported on alumina and zinc with high dispersion. Especially, gold supported on alumina gave the highest conversion of NO to nitrogen as about 80% at 700K. The mechanical mixing of manganese oxide with Au/alumina appreciably increased the conversion of NO to nitrogen. It reached over 90% at temperatures between 623K and 723K. The roles of manganese oxide which was mixed with Au/alumina should be concluded that it promots the NO oxidation.
  14. 1)Atsushi ueda et al., "Reduction of Nitrogen Monoxide with Propene over Supported Gold Catalysts in the Presence of Excess Oxygen and Moisture", Proceedings of the First World Congress of Environmental Catalysis, p.253-256, Pisa (Italy), 1995.
    2)Atsushi Ueda et al., Shokubai(Catalyst), 36, 112-118(1994).