کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
209318 461665 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental study of the kinetics of sulfation of alkali chloride deposits
ترجمه فارسی عنوان
مطالعه تجربی سینتیک سولفات رسوبات کلرید قلیایی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• In-deposit sulfation of alkali chlorides was studied for a wide range of conditions.
• Experimental conditions were selected to simulate biomass-fired boilers.
• A kinetic expression (Arrhenius law) was derived from the experimental results.
• This kinetics has been compared with the expressions proposed by other authors.

The composition of ash deposits formed in biomass combustion systems can be significantly modified by the sulfation of alkali salts. In order to assess the efficiency of this process, the conversion of alkali chlorides into alkali sulfates occurring in deposits at surface temperatures representative of those in biomass boilers (350–650 °C) was quantified by means of specific short-term experiments with realistic deposits. The influence of operating conditions (reaction time, surface temperature and sulfur concentration) was characterized and the results were used to derive a kinetic expression for the in-deposit sulfation of KCl. This kinetics was compared with those proposed by other authors for solid NaCl and molten KCl. Contrary to previous results for solid NaCl, but in agreement with observations for solid KCl and calculations for molten KCl, the proposed kinetics predicts a relevant effect of sulfation on the properties of deposits formed in biomass-firing boilers even in the short-term scale.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel Processing Technology - Volume 140, December 2015, Pages 215–221
نویسندگان
, ,