کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
58489 47154 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of oxygen supply rates on performances of catalytic membrane reactors: Application to the oxidative coupling of methane
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Influence of oxygen supply rates on performances of catalytic membrane reactors: Application to the oxidative coupling of methane
چکیده انگلیسی

The impact of oxygen permeability using an ionic oxygen conducting membrane reactor with surface catalyst was investigated for the oxidative coupling of methane to higher hydrocarbons. Dense Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCFO), Ba0.5Sr0.5Mn0.8Fe0.2O3−δ (BSMFO) and BaBi0.4Fe0.6O3 (BBFO) membrane disks with Pt/MgO catalysts were prepared by sol–gel deposition or wash-coating. It is demonstrated that the oxygen supply by permeation needs to fit to the consumption during the coupling reaction. In case of insufficient oxygen supply comparably poor conversions are observed while higher oxygen fluxes lead to increased methane conversions, especially in the presence of an efficient catalyst. Generally, increasing catalytic activity leads to lower C2 selectivity, especially for low oxygen permeation fluxes. The concept of a reactor employing dense catalytic membranes is viable, but the present study identifies further potential when the activity of the catalyst for the oxidative coupling is improved, leading to an overall enhanced performance of the membrane reactor.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 127, Issues 1–4, 30 September 2007, Pages 157–164
نویسندگان
, , ,