کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10274771 461725 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A novel particle/monolithic two-stage catalyst bed reactor and their catalytic performance for oxidative coupling of methane
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
A novel particle/monolithic two-stage catalyst bed reactor and their catalytic performance for oxidative coupling of methane
چکیده انگلیسی
A novel two-stage catalyst bed reactor was constructed comprising of the 5%Na2WO4-2%Mn/SiO2 particle catalyst and the 5%Na3PO4-2%Mn/SiO2/cordierite monolithic catalyst. The reaction performance of the oxidative coupling of methane (OCM) in the two-stage bed reactor system was evaluated. The effects of the bed height and operation mode, as well as the reaction parameters such as reaction temperature, CH4/O2 ratio and flowrate of feed gas on the catalytic performance were investigated. The results indicated that the two-stage bed reactor system exhibited a good performance for the OCM reaction when the feed gases were firstly passed through the particle catalyst bed and then to the monolithic catalyst bed. The CH4 conversion of 32.6% and C2 selectivity of 67.5% could be obtained with a particle catalyst bed height of 10 mm and a monolithic catalyst bed height of 50 mm in the two-stage bed reactor. Both of the CH4 conversion and C2 selectivity have been increased by 4.8% and 2.5%, respectively, as compared with the 5%Na2WO4-2%Mn/SiO2 particle catalyst in a single-bed reactor and by 7.7% and 16.1%, respectively, as compared with the 5%Na3PO4-2%Mn/SiO2/cordierite monolithic catalyst in a single-bed reactor. The catalytic performance of the OCM in the two-stage bed reactor system has been remarkably improved. The TPR results indicate the high temperature reduction oxygen species in the monolithic catalyst might be favorable to the formation of C2 products.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel Processing Technology - Volume 92, Issue 3, March 2011, Pages 541-546
نویسندگان
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