کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1275725 1497537 2013 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simultaneous production of H2 and C2 hydrocarbons by using a novel configuration solid-electrolyte + fixed bed reactor
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Simultaneous production of H2 and C2 hydrocarbons by using a novel configuration solid-electrolyte + fixed bed reactor
چکیده انگلیسی

A novel combined single chamber solid electrolyte plus fixed bed reactor configuration was developed for the simultaneous production of H2 and C2 hydrocarbons from a humidified CH4 atmosphere. Hence, a Pt/YSZ/Ag solid electrolyte cell was placed on the top of an active oxidative coupling catalyst powder bed Ce–Na2WO4/SiO2. H2 was produced via steam electrolysis in a Pt cathode of the solid electrolyte cell (H2O + 2e− → H2 + O2−). Simultaneously, the produced O2− ions were electrochemically pumped to the Ag anode, leading to the C2s production, via oxidative coupling of CH4 (4CH4 + 3O2− → C2H4 + C2H6 + 3H2O + 6e−). Additionally, non-reacted O2− molecules desorbed to the gas phase (2O2− → O2+4e−) and reacted with CH4 in the catalyst bed leading to an increase of C2s yield. The influence of different reaction parameters was investigated together with long-term reaction experiments, confirming the stability of this configuration for its practical application. The obtained results demonstrated that the addition of an active catalyst bed strongly enhances both: the efficiency of the single chamber steam electrolysis and the oxidative coupling process.

Figure optionsDownload as PowerPoint slideHighlights
► A new reactor configuration allowed to simultaneously produce H2 and C2 hydrocarbons.
► The presence of the catalyst bed increased the production of H2 and C2 hydrocarbons.
► The presence of the catalyst bed decreased the energy requirements of the system.
► Long-term experiments demonstrate the viability of this system for its application.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 8, 19 March 2013, Pages 3111–3122
نویسندگان
, , , , , , ,