The effects of partial demineralization and alkali metals on the thermochemical process of direct coal liquefaction residue in steam atmosphere were investigated by thermogravimetric analyzer,and the apparent activation energy of gasification was calculated.The results show that partial demineralization increases the conversion rate of direct coal residue in the course of pyrolysis and gasification,reduces the apparent activation energy of coke,and has a positive effect on the thermochemical process.NaCl shows no obvious catalytic effect during pyrolysis and gasification.KCl also show no obvious catalytic effect in the pyrolysis process,but in the gasification stage,it improves the gasification conversion rate of coke at low temperature,shows catalytic effect on the gasification,and makes the gasification reaction of coke switches to the internal diffusion transition zone.
关键词
煤直接液化渣/部分脱灰/碱金属/热化学过程/动力学
Key words
coal direct liquefaction residue/partial demineralization/alkali metal/thermochemical process/kinetic
维普
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