کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
157181 456964 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Carbon dioxide capture with dolomite: A model for gas–solid reaction within the grains of a particulate sorbent
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Carbon dioxide capture with dolomite: A model for gas–solid reaction within the grains of a particulate sorbent
چکیده انگلیسی

This work describes a mathematical model for a gas–solid reaction taking place within reactant particles made up of very small spherical grains, which grow during the reaction process due to solid product formation around the grain inner core, so that the particle void-fraction is reduced as the reaction proceeds. The structural changes in the spherical grains are taken into account in the proposed model by the inclusion of a variable diffusion coefficient of the gaseous reactant through the developing product layer. This progressively increasing transport resistance leads to a marked reduction in both reaction rate and sorbent capacity, as observed in practice in the carbonation of calcined dolomite, a process of importance in hydrogen production by means of coal or biomass gasification.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 64, Issue 10, 15 May 2009, Pages 2343–2352
نویسندگان
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