کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6692769 501924 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation on water vapor effect on direct sulfation during wet-recycle oxy-coal combustion
ترجمه فارسی عنوان
بررسی اثر بخار آب بر سولفات مستقیم در احتراق ذغال سنگ آهکی مرطوب
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی
During oxy-coal combustion process, limestone desulfurization may change from indirect into direct sulfation due to the high partial pressure of CO2. When the wet flue gas is recycled, the water vapor will also be enriched in the furnace and affect the desulfurization reactions. In the paper, two limestone sorbents were used to study the effect of water vapor on direct sulfation. Parameters including water vapor concentration, temperature and SO2 concentration were analyzed. Results show that the presence of water vapor has a negligible effect on the direct sulfation during the kinetically-controlled regime, while enhances the calcium conversion during the diffusion-controlled stage. The presence of water vapor promotes the solid-state diffusion of the sulfated product, and sintering of the product layer is intensified. The vacancies in the particles migrate along crystal grain boundaries and through the crystal lattice, resulting in a reverse flow of mass into the pores. The pore structure character of the products sulfated in the presence of water vapor is improved.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 108, August 2013, Pages 121-127
نویسندگان
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