Abstract
Transformation of agricultural wastes into biomass energy is a strategy towards the development of alternative energy sources. In this study, the effect of the additives on combustion performance of cow dung briquette was investigated. Cow dung briquette (CDB) was prepared using the cold-press briquetting technology by mixing of coal and cow dung as raw materials, composite of potassium nitrate, manganese dioxide and citric acid as combustion promoter, mixture of calmogastrin and molybdenum as smoking suppressor, sodium humate and red clay as binder and acidified calcium oxide as desulphurizer. The comprehensive combustion characteristic index (SN), the stable burning characteristic index (DW) and the burnout index (Cb) of CDB were calculated by thermogravimetric analysis. The desulphurizing property of CDB was examined. When the mass ratio of cow dung to coal is 1:3-4, the mass content of binder, combustion promoter, smoke suppressor and desulphurizer are 17.0%, 6.0%, 4.5% and 6.5%, respectively, the calorific value of CDB is 19.1 MJ/kg, ash content is 29.5%, volatile matter is 13.0% and desulphurization rate can be reached to 70.02%.
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