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中南大学学报(英文版)

Journal of Central South University

Vol. 23    No. 2    February 2016

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Conversion and reaction kinetics of coke oven gas over a commercial Fe-Mo/Al2O3 catalyst
QU Yi-xin(屈一新)1, XU He-ming(徐贺明)1, 2, ZHAO Jian-feng(赵见峰)1, WANG Zhi-yan(王志彦)2, WANG Ya-tao(王亚涛)2

1. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
2. Coal Chemical Research and Development Center of Kailuan Group, Tangshan 063611, China

Abstract:Producing methanol from coke oven gas (COG) is one of the important applications of COG. Removal of sulfur from COG is a key step of this process. conversion and reaction kinetics over a commercial Fe-Mo/Al2O3 catalyst (T-202) were studied in a continuous flow fixed bed reactor under pressures of 1.6-2.8 MPa, space time of 1.32-3.55 s and temperatures of 240-360 °C. Though the COG contains about 0.6 mol/mol H2, hydrogenation of CO and CO2 is not significant on this catalyst. The conversions of unsaturated hydrocarbons depend on their molecular structures. Diolefins and alkynes can be completely hydrogenated even at relatively low temperature and pressure. Olefins, in contrast, can only be progressively hydrogenated with increasing temperature and pressure. The hydrodesulfurization (HDS) of CS2 on this catalyst is easy. Complete conversion of CS2 was observed in the whole range of the conditions used in this work. The original COS in the COG can also be easily converted to a low level. however, its complete HDS is difficult due to the relatively high concentration of CO in the COG and due to the limitation of thermodynamics. H2S can react with unsaturated hydrocarbons to form ethyl mercaptan and thiophene, which are then progressively hydrodesulfurized with increasing temperature and pressure. Based on the experimental observations, reaction kinetic models for the conversion of ethylene and sulfur-containing compounds were proposed; the values of the parameters in the models were obtained by regression of the experimental data.

 

Key words: coke oven gas; conversion; Fe-Mo/Al2O3 catalyst; sulfur-containing compound; kinetics

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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