کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6588750 | 1423242 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Extension to multiple temperatures of a three-reaction global kinetic model for methane dehydroaromatization
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Extension to multiple temperatures of a three-reaction global kinetic model for methane dehydroaromatization Extension to multiple temperatures of a three-reaction global kinetic model for methane dehydroaromatization](/preview/png/6588750.png)
چکیده انگلیسی
An alternative to flaring of surplus natural gas is methane dehydroaromatization (MDA) to benzene (C6H6) over a bifunctional molybdenum/zeolite catalyst. Byproducts include H2, C2H4, and naphthalene (C10H8). While an MDA detailed elementary reaction mechanism is now available, a simpler global kinetic model is more useful for engineering and screening calculations. A literature three-step reaction model exists but with rate constants only at 950â¯K. In the current work, Arrhenius parameters for the three global reactions have been determined over 948-1023â¯K based on a regression of major gas species concentration data generated from Chemkin® simulations of a packed bed reactor running the detailed MDA mechanism. In addition, the three-step model is used to illustrate the need to remove H2, perhaps through a membranous reactor wall, in order to overcome strong equilibrium CH4 conversion limitations. Such H2 removal, though, improves C10H8 selectivity at the expense of C6H6.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 177, 23 February 2018, Pages 132-138
Journal: Chemical Engineering Science - Volume 177, 23 February 2018, Pages 132-138
نویسندگان
Y. Zhu, N. Al-ebbinni, R. Henney, C. Yi, R. Barat,