Sharma Sanjeev Kumar, Anand Amrit, Gautam Shalini, Chattopadhyay Milan
Department of Fuel, Minerals and Metallurgical Engineering, Indian Institute of Technology (ISM) Dhanbad, Dhanbad, Jharkhand 826004, India.
ACS Omega. 2024 Aug 22;9(35):37035-37043. doi: 10.1021/acsomega.4c03475. eCollection 2024 Sep 3.
Coal gasification is the most demanding technology, increasing day by day for synthesis gas and chemical production in a clean environment. Coal is a primary source of energy or fuel. India has a high preservation of high-ash coal. Employment of this coal for gasification is tough due to its abrasive nature. Coal blending is an effective way to utilize such coal and to control the gasification performance. The present study focuses on using high-ash, low-rank Indian coal with high-rank imported coal in a suitable blend. The blending effect on raw gas yield (kg/kg of coal) and heating value (kcal/Nm) was studied for coal blends-CH1 (20:80), CH2 (30:70), CH3 (40:60), CH4 (50:50), and CH5 (60:40) of RC (raw Indian coal) with RH (raw high-rank imported coal). Also, the gasification characteristics of the WC (washed Indian coal) were studied similarly. It may be seen that the raw gas yield with blends of raw coal and the rank of imported coal is 1.11 to 1.46 (ton/ton of coal), whereas in washed Indian coal, it is 0.95 (ton/ton of coal). A slight change was observed in the heating value of raw gas, and its average value in the blended CH1 to CH5 coal is 2860 kcal/Nm, whereas in WC, it is 2956 kcal/Nm. The maximum utilization of raw coal in the blend for gasification can be 60%, which is economical and 0.55 times more effective than WC gasification.
煤气化是最具挑战性的技术，在清洁环境中用于合成气和化学品生产的需求日益增加。煤炭是主要的能源或燃料来源。印度高灰分煤炭储量丰富。由于其磨蚀性，使用这种煤炭进行气化具有难度。配煤是利用此类煤炭并控制气化性能的有效方法。本研究重点关注将高灰分、低阶的印度煤炭与高阶进口煤炭按适当比例混合使用。研究了印度原煤（RC）与进口高阶原煤（RH）的混合煤CH1（20:80）、CH2（30:70）、CH3（40:60）、CH4（50:50）和CH5（60:40）对原料气产量（kg/kg煤）和热值（kcal/Nm）的混合效果。此外，还以类似方式研究了洗选印度煤（WC）的气化特性。可以看出，原煤与进口煤混合后的原料气产量为1.11至1.46（吨/吨煤），而洗选印度煤的原料气产量为0.95（吨/吨煤）。观察到原料气热值有轻微变化，混合CH1至CH5煤的原料气热值平均值为2860 kcal/Nm，而洗选印度煤的原料气热值平均值为2956 kcal/Nm。混合煤用于气化的原煤最大利用率可达60%，这既经济又比洗选印度煤气化效率高0.55倍。
