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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received April 6, 2001
Accepted June 7, 2001

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Hydrogenation of CO2 over Fe-K Based Catalysts in a Fixed Bed Reactor at Elevated Pressure

Myoung-Jae Choi^† Jun-Sik Kim¹ Hak-Ki Kim Sang-Bong Lee Yong Kang¹ Kyu-Wan Lee

Environment and Resource Team, KRICT, P.O.Box 107 Yusong, Daejeon 305-600, Korea ¹Dept. of Chem. Eng., Chungnam National University, Daejeon 305-764, Korea

mjchoi@pado.krict.re.kr

Korean Journal of Chemical Engineering, September 2001, 18(5), 646-651(6), 10.1007/BF02706381

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Abstract

Catalytic hydrogenation of CO2 to produce hydrocarbons was conducted in a fixed bed reactor (1.6 cm-ID×60 cm-High). Fe-K based catalysts (KRICAT-A, B) were used for more than 850 hours to maintain CO2 conversion level up to 30 C-mol% in the fixed bed micro-reactor. Effects of operating variables on the CO2 conversion, hydrocarbon yield and its selectivity were investigated. The CO2 conversion and total hydrocarbon yield increased with increasing reaction temperature (250-325 ℃), pressure (0.5-2.5MPa) and H2/CO2 mol ratio (2-5); however, they decreased with increasing space velocity (1,000-4,000 ml/g(cat.)hr) in the reactor. The selectivities of liquid products increased with increasing reaction pressure; however, they decreased with increasing temperature, space velocity and H2/CO2 ratio. From the results of an experimental study, optimum operating conditions for the maximum yield of olefinic liquid products were found as T=315 ℃, P=1.5MPa, SV=2,000 ml/g(cat.)hr and H2/CO2 ratio=3 in the fixed bed reactor within these experimental conditions.

Keywords

Catalyst Carbon Dioxide Fixed Bed Hydrogenation

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