کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9629159 | 461287 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Water gas shift reaction kinetics in Fischer-Tropsch synthesis over an industrial Fe-Mn catalyst
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
The kinetics of water gas shift (WGS) reaction over an Fe-Mn catalyst under Fischer-Tropsch synthesis (FTS) reaction conditions is studied in a spinning basket reactor. Experimental conditions are varied as follows: temperature of 533-573Â K, reactor pressure of 10.0-26.5Â bar, H2/CO feed ratio of 0.66-2.0 and space velocity of 0.66-2.65Ã10â3Â Nm3Â kgcatâ1Â sâ1. By separately fitting WGS kinetics parameters with experimental data, which is possible in the spinning basket reactor with neglecting concentration and temperature gradients, different kinetics models of WGS are derived and discriminated on the basis of four sets of WGS elementary reactions. Kinetics experimental results show that the WGS reaction under FTS reaction conditions is far from equilibrium. Two types of WGS mechanisms are investigated. One is the formate mechanism, and the other is the direct oxidation mechanism. It is found that the formate mechanism is better in fitting experimental data than the direct oxidation mechanism over the Fe-Mn catalyst under the FTS reaction conditions. The optimized kinetics model with formate intermediate dissociation as the rate-determining step (RDS) can fit the WGS experimental results well. The simplified WGS kinetics model can easily be used for industrial modeling applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 84, Issues 7â8, May 2005, Pages 917-926
Journal: Fuel - Volume 84, Issues 7â8, May 2005, Pages 917-926
نویسندگان
Bo-Tao Teng, Jie Chang, Jun Yang, Gang Wang, Cheng-Hua Zhang, Yuan-Yuan Xu, Hong-Wei Xiang, Yong-Wang Li,