Chchchcooh

The reaction thermodynamic parameters were also presented in Table 3. It can be seen that these reactions can easily occur once the formation of CH2COOH. 3.6. The main reactions to produce CO and H2 Carbon monoxide is principally generated from the dissociation of C02, as shown in Figure 3. The experiment also showed the selectivity of CO was almost proportional to C02 concentration in the feed 28 . In addition, the reaction between the hydrocarbon radicals and oxygen atom can also produce CO...

Info

Effect of methanol H20 ratio le chemical reduction of CO2 iron powder. , CH4 A , , C2H6. Iron powder, 0.8 g am volume, 30 mL reaction 5 h reaction temperature, 25 C. Fig. 2. Effect of zinc powder amount on the chemical reduction of C02 using zinc powder. Medium, H20 30 mL reaction time, 5 h reaction temperature, 25 C. Fig. 2. Effect of zinc powder amount on the chemical reduction of C02 using zinc powder. Medium, H20 30 mL reaction time, 5 h reaction temperature, 25 C....

Plasma Enhanced Preparation of Highly Dispersed NiAl Catalyst for C Reforming of Methane

Dang-guo Cheng, Qing Xia and Chang-jun Liu ABB Plasma Greenhouse Gas Chemistry Laboratory, Key Laboratory for Green Chemical Technology of Ministry of Education and School of Chemical Engineering, Tianjin University, Tianjin 300072, P.R. China FAX 86-22-27890078. E-mail changliu public.tpt.tj.cn A special plasma catalyst preparation, which includes a glow discharge plasma treatment followed by calcinations thermally, was developed for CO2 reforming of methane. Such prepared Ni A Os catalyst...

Electro and photocatalytic reduction of CO

Spectroscopic characterization of intermediates in C02 reduction with rhenium photocatalysts E. Fujita, Y. Hayashi, S. Kita and B.S. Brunschwig Electrochemical reduction of C02 at alloy electrode in methanol S. Kaneco, H. Yamauchi, H. Katsumata, T. Suzuki and K. Ohta Photoactivation of Ti centers in mesoporous silicate sieve under visible and UV light W. Lin and H. Frei Photocatalytic reduction of C02 with H20 on Ti-containing mesoporous silica hydrophobically modified using fluoride ions H....

Chairmans Remark

Thanks to the Contributors of 7th ICCDU, This proceedings contain papers presented and displayed as posters at the Seventh International Conference on Carbon Dioxide Utilization ICCDU VII held for four days during October 12-16, 2003 at Hoam Convention Center in Seoul, Korea. The ICCDU conferences are held every two years alternating continental. The First ICCDU was held in Nagoya, Japan in 1991, the second at Bari, Italy in 1993, the third at Oklahoma, USA in 1995, the fourth in Kyoto, Japan...

Iccdu Proceeding

The global environmental problems, especially the global warming caused by the accelerative accumulation of carbon dioxide in the atmosphere, are nowadays the most crucial for human beings as well as global sustainability. Due to this global environmental issue, the scientists and engineers, who had a strong interest and wished to contribute to solve the carbon dioxide problem from technological aspects, gathered and discussed the countermeasures in this conference. As a result of this effort,...

Co ho coh

Carbonaceous materials CaO 2H2O - gt 2H2 CaC03 paper. The residue was dried at 378 K overnight. The product gas and obtained gas by HC1 addition were analyzed by gas chromatography with TCD GC323, GL Sciences and FID GC353B, GL Sciences . The amount of inorganic carbon CO2 in both filtrates was measured by a TOC meter TOC-5000A, Shimadzu . The CO2 obtained by HC1 addition and C02 dissolved in the filtrates were regarded as CO2 fixed in CaO. The effect of the molar ratio of CaO as a CO2 sorbent...

Chemicals from C via heterogeneous catalysis at moderate conditions

State Key Laboratory of Coal Conversion, Institute of Coal Chemistry Chinese Academic of Sciences, Taiyuan, 030001 PR China For the mitigation of global warming due to carbon dioxide, catalytic conversion of CO2 has been extensively investigated for last decade. Most of studies in this field focused on the utilization of carbon dioxide mainly as a carbon source or as an oxide reagent. As a result, those processes required a significant amount of energy input because CO2 is thermodynamically...

Synthesis of dimethyl carbonate by transesterification over CaOcarbon solid base catalysts

Tong Wei, Mouhua Wang, Wei Wei, Yuhan Sun , Bing Zhong State Key Laboratory of Coal Conversion, Institute of Coal Chemistry Chinese Academic of Sciences, Taiyuan, 030001 PR China Carbon supported CaO solid base catalysts, CaO C and CaO-C were prepared by loading CaO on carbon through impregnation and pugging method, respectively. The catalytic performance of CaO-C prepared by pugging method was much higher than that of CaO C prepared by impregnation method due to its larger effective pore...

IVC as oxidant

New C02 chemistry - recent advances in utilizing C02 as an oxidant and current understanding on its role Tri-reforming of methane over Ni catalysts for C02 conversion to syngas with desired H2 CO ratios using flue gas of power plants without C02 separation C. Song, W. Pan, S.T. Srimat, J. Zheng, Y. Li, Y.-H. Wang, B.-Q. Xu and Q.-M. Zhu C02 dehydrogenation of propane over Cr-MCM-41 catalyst K. Takehira, Y. Oishi, T. Shishido, T. Kawabata, K. Takaki, Q. Zhang and Y. Wang C02 reforming of...

Co2 Hydrogenation To Methanol Synthesis

The use of CO2 as feedstock for producing chemicals will not have a major impact on the mitigation of greenhouse gas emissions, at least in a short-medium term scenario, but is an integral part of carbon management 1-3 , because provides a strategic path for its recycle and reuse. There are several motivations for producing chemicals from CO2 - CO2 is a cheap especially considering possible C02-emission taxes and nontoxic feedstock that can replace toxic chemicals such as phosgene or...

Results And Discussion

Tosoh Aia 900 Utilisation

The weight loss of CuFe204 was monitored with TGA during the reduction with ch4 gas up to 800 C Fig. 1-a . In the reaction, the weight of CuFe204 decreased showing a two-step reduction. One step reduction started from 350 C and the weight of CuFe204 decreased about 8 wt up to 540 C. The other step reduction started from 640 C and the weight of CuFe204 decreased about 19.5 wt at 800 C. There are 4 oxygen atoms in CuFe204, and the total weight percentages of oxygen atoms in CuFe204 are 26.7 ....

Introduction

Catalytic hydrog nation of carbon dioxide has been recognized as one of the best methods to mitigate global warming as well as to solve carbon resource problems 1-5 . Methanol synthesis from carbon dioxide and hydrogen has been most widely investigated, even if the conversion of carbon dioxide is limited by the thermodynamic constraint 1,2 . The thermodynamic equilibrium could be shifted if methanol is converted within the reaction system. One simple approach is to apply the hybrid or composite...

Synthetic hydrocarbon fuels and C utilization

Engler-Bunte-Institut, Universit t Karlsruhe TH , Engler-Bunte-Ring 1, D-76131 Karlsruhe, Germany corresponding author Georg.Schaub ciw.uni-karlsruhe.de The potential of generating or utilizing C02 during Fischer-Tropsch FT hydrocarbon synthesis affects overall efficiencies in synthetic hydrocarbon fuel production. Looking at different carbon-containing raw materials, the behavior of C02 during FT synthesis is determined by syngas composition ratio H2 CO, availability of H2 , type of catalyst...

Hydrocarbon Synthesis

High value hydrocarbon transportation fuels in particular diesel fuel can be synthesized from any carbon-containing raw material via synthesis gas production and subsequent Fischer-Tropsch FT synthesis Fig. 1 . This may become interesting because fuel supply today is based to a large extent on hydrocarbons and demands will increase very significantly in the future, due to the expected increase in the number of motor vehicles in the world. Car manufacturers expect a total of 1.4 x 109 of cars...

Chchchchch

CH3CH2CH2 H e' straight CH3CHCH3 H e' branched - CH3CH2CH2CH3 straight gt CH3CH CH3 CH3 branched CH3CH2CH2CH2 H e' straight CH3 CH2CHCH3 H e ' branched - gt CH3CII2CH2CH2CH3 straight CH3CH2CH CH3 CH3 branched Such reactions are responsible for the synthesis of higher hydrocarbons within discharges. In addition, alkenes and acetylene can be produced from the CH2 and CH radicals. At the same time, the formed hydrocarbon radicals will involve in these reactions to produce oxygenates, like...

Gj Gj

Mass And Energy Balance

Figure 1 Mass and energy balance of overall process from biomass to liquid. Figure 1 Mass and energy balance of overall process from biomass to liquid. In this study, we estimated overall process of biomass to liquid fuel, which was proposed by Agro-fuel Team supported by NEDO. The mass and energy balance was calculated, and the following conclusion was obtained, S 8 or 9 ton of liquid fuel would be produced from 100 dry-tons of rice straw at the condition of 02 C of 0.25 or 0.2, 24 or 27 of...

Pi Pni Zni

Equilibrium constant of the CO-shift reaction Number of moles of i Number of carbon atoms in i mol s Molar flow of i Stoichiometric coefficient of i in reaction j Pa Total pressure lK V Mass catalyst specific reaction rate of reaction j K Isothermal reactor temperature g s cm3 Modified residence time Yield of i related to total carbon fed Molar fraction of C02 in CO and C02 in the feed Stoichiometric weighted molar fraction of H2 in CO and C02 in the feed 1. Schaub, G., Unruh, D., Rohde, M.,...

Organization

Michele Aresta David Beecy Son-Ki Ihm Donald Darensbourg Tomoyki Inui Eckhard Dinjus Yoichi Kaya Baldur Eliasson Kenneth Nicholas Research Institute of Innovative Technology for the Earth, Japan ABB Switzerland Ltd., Switzerland Univ. of Oklahoma, USA Swiss Federal Institue of Technology, Switzerland Chalmers Univ. of Technology and Gothenburg Univ., Sweden Weizmann Institute of Science, Israel Allan A. Johansson Tatsuaki Yashima Shohei Inoue Shin-ya Yokoyama The Technical Research Centre of...

Heterogeneous Catalytic Reactions with C Status and Perspectives

Gabriele CENTI and Siglinda PERATHONER Department of Industrial Chemistry and Engineering of Materials and ELCASS European Laboratory for Surface Science and Catalysis , University of Messina, Italy.1 The use of CO2 as feedstock for producing chemicals is not only interesting to contribute to mitigation of greenhouse gas emissions, but an interesting challenge to explore new concepts and new opportunities for catalysis and industrial chemistry. The present state and perspectives in...

Acknowledgments

This research was supported by a grant from Carbon Dioxide Reduction amp Sequestration Research Center funded by the Ministry of Science and Technology of Korea. 1. Y. Yoshimura, N. Kijima, T. Hayakawa, K. Murata, K. Suzuki, F. Mizukami, K. Matano, T. Konishi, T. Oikawa, M. Saito, T. Shiojima, K. Shiozawa, K. Wakui, G. Sawada, K. Sato, S. Matsuo and N. Yamaoka, Catalysis Surveys from Japan, 4 2000 157. 2. Komatsu, T., Ishihara, H., Fukui, Y., and Yashima, T., Appl. Catal. A., 214 2001 103. 3....

Novel Catalysts for Gasification of Biomass with High Energy Efficiency

Gasification Catalysts

Tomohisa Miyazawa, Mohammad Asadullah, Mohammad Nurunnabi, Baitao Li, Kimio Kunimori, Keiichi Tomishige Institute of Materials Science, University of Tsukuba 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan Tel Fax 81-298-53-5030, E-mail tomi tulip.sannet.ne.jp We have developed novel catalysts for gasification of biomass with much higher energy efficiency than conventional methods non-catalyst, dolomite, commercial steam reforming Ni catalyst . It is found that novel Rh CeCVSiCh catalyst...

Feedstock Coal

As for potential CO2 utilization, the situation with coal is similar to that of biomass. The feedstock is poor in hydrogen, so syngas H2 content must be increased by shift conversion of CO, leading to high amounts of CO2 that are ultimately emitted to the atmosphere. Resulting carbon utilization and energy efficiencies are low Table 1 , leading to high extra-fossil CO2 emissions. Large integrated coal-to-liquid plants have been operating successfully in South Africa since the 1950s 6 , and very...

Mathematical Modelling Studies Of A Membrane Reactor

For the purpose of studying the limiting factors for membrane application, one-dimensional ID and two-dimensional 2D mathematical models for a fixed bed reactor configuration have been developed 7j. These models include the kinetics of FT and CO shift reactions determined in earlier experimental studies 8 , They should represent the effects of in-situ removal of H2O, determine permeance requirements and identify promising experimental conditions, The model includes the following assumptions i...

Reduction of carbon dioxide using metal powders

Hideyuki Katsumata' , Kouichirou Matsushitaa, Satoshi Kaneco3, Tohru Suzukib and Kiyohisa Ohtaa a Department of Chemistry for Materials, Faculty of Engineering, Mie University, Tsu, Mie 514-8507, Japan b Environmental Preservation Center, Mie University, Tsu, Mie 514-8507, Japan Corresponding author. E-mail address hidek chem.mie-u.ac.jp Reduction of CO2 was performed in the presence of metal powders such as iron, zinc and magnesium under ambient temperature and pressure. When iron powder was...

Fixed Co2 System Diagram

Co2 Conversion

Trimm, Topics Catal. 22 2003 319. 2 Z. Zsoldos, A. Sarkany, and L. Guczi, J. Catal., 145 1994 235. 3 A. Sarkany, Z. Zsoldos, B. Furlong, J.W. Hightower, and L. Guczi, J. Catal., 141 1993 566. 4 C.-T, Hong, C.-T. Yeh, and F.-H. Yu, Appl. Catal., 48 1989 , 385. 51 N. Iwasa, S. Masuda, N. Ogawa, and N. Takezawa, Appl. Catal. A, 125 1995 145. 16 N. Iwasa, T. Mayanagi, N. Ogawa, K. Sakata, and N. Takezawa, Catal. Lett., 54 1998 119. 7 MX. Cubeiro and J.L.G. Fierro,...