Effect of Solid Additives on Pyrolysis Behaviour of Makerwal Coal

The method used in this study provides a quantitative description of the relationship between the chemical structure of coal and the physical and chemical properties of the resultant pyrolysis products (gas, tar, liquid, and char). The purpose of this study is to investigate the effect of inorganic solid additives (Na2CO3, K2CO3, CaCO3, MgCO3, Fe2O3 and CaSO4,), on flash pyrolysis of high volatile bituminous coal samples from Makerwal coalfields by using open tubular type pyrolyzer coupled with gas chromatography. Two different coal samples were selected for this purpose. The sampling apparatus consisted of two traps in order to separate the products into fractions on the basis of their volatility such as tar, liquid, and gaseous fractions. The product yields released from each sample in their raw, de-mineralized and salt treated form were monitored. The gaseous fractions were directly introduced to GC for identification. The gases were C-1-C-5, hydrocarbons. The pyrolysis was carried out at 690 degrees C. Some evaluations and comparisons, from the results obtained, are presented.