کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9632222 | 461806 | 2005 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhancement of distillate selectivity in Fischer-Tropsch synthesis on a Co/SiO2 catalyst by hydrogen distribution along a fixed-bed reactor
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This work investigates the effect of hydrogen distribution in a fixed bed on the activity and selectivity of Co/SiO2 (22.2 wt.% Co) Fischer-Tropsch (FT) catalysts. Hydrogen is introduced from 4 equally spaced axial locations and the flow rates are adjusted with 3 different strategies; the so-called decreasing, equal, and increasing flow strategies. Distribution of hydrogen results in different H2/CO ratio along the reactor, which in turn controls the product selectivity. As compared to the co-feed strategy, the decreasing strategy suppressed methane selectivity by 20%, while enhancing C5+ selectivity by about 16% and increasing chain growth probability to a limited extent. The olefin to paraffin selectivity ratio also shows an improvement by a factor of 1.6-1.8, depending upon the type of strategy employed. The dependence of product selectivity on the operating conditions such as temperature, overall H2/CO ratio, and feed residence time was also explored.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel Processing Technology - Volume 86, Issues 12â13, 25 August 2005, Pages 1253-1264
Journal: Fuel Processing Technology - Volume 86, Issues 12â13, 25 August 2005, Pages 1253-1264
نویسندگان
S. Sharifnia, Y. Mortazavi, A. Khodadadi,