کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1552368 998193 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Further advances toward the development of a direct heating solar thermal chemical reactor for the thermal dissociation of ZnO(s)
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Further advances toward the development of a direct heating solar thermal chemical reactor for the thermal dissociation of ZnO(s)
چکیده انگلیسی

We designed, built and experimentally tested a solar thermal chemical reactor for producing Zn from ZnO(s). We describe the salient features of the reactor concept, the design process itself, and initial experimental results from testing the reactor under solar conditions for both the thermal reduction of ZnO(s) and the carbothermal reduction of the oxide. The reactor operated reliably for more than 100 h. Reactor cavity temperatures reached 2000 K. For the carbothermal reduction of ZnO(s), the solid product was Zn with a purity exceeding 95 mol%. For this reaction, we report reactor and process efficiencies versus cavity temperature. Average values were as high as 14% and 12% respectively. There is an optimal operating temperature and feed condition for these efficiencies: the positive effect of high reaction rates at high temperatures must be balanced against high radiation losses from the reactor at high temperatures. At the operating conditions leading to the highest efficiencies, we produced 1.5 moles of Zn for each mole of consumed carbon. Although the reactor operated mechanically as expected for the thermal reduction of ZnO(s), we were not yet able to obtain high Zn yields.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy - Volume 80, Issue 5, May 2006, Pages 500–511
نویسندگان
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