An investigation on the parametric study of co-gasification in allothermal circulating fluidized bed gasifier.

Sadiq Hussain, Tazien Rashid, khurram shahzad, Niaz Ahmad Akhtar, Arshad chughtai, Akhtar Ali Kalrou, Muhammad Usman

Abstract


Co-gasification of coal and bagasse in circulating fluidized bed gasifier (CFBG) is an emerging technique. The objectives of the current study are to investigate the influence of different parameters (temperature, ER values and feed composition) on the yield of producer gas in temperature range of 750 °C to 950 °C under reducing atmosphere. The study revealed that higher ER values (0.24 to 0.38) not only effected the composition of the producer gas but also has strong influence on the temperature profile in the riser section of the gasifier. In the temperature range of 792 °C-882 °C, the molar ratio of H2/CO was decreased from 0.82 to 0.77, but with further increase in temperature (820 °C to 931 °C) the molar ratio increased from 0.81 to 0.87. However, the molar ratio of CO/CO2 increased from 0.57 to 0.67 and then decreased from 0.65 to 0.62 for the similar temperature range. The increase of bagasse fraction in low-grade coal leads to the decrease in the concentration of CO, H2 and CH4, however, an increase in the CO2 concentration was observed due to increased fraction of oxidants in the feedstock.


Keywords


Co-gasification of coal and bagasse in circulating fluidized bed gasifier (CFBG) is an emerging technique. The objectives of the current study are to investigate the influence of different parameters (temperature, ER values and feed composition) on the yi



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