TG-FTIR研究煤油共热解产物逸出行为OA北大核心CSTPCD

Coal and residuum are first co-pyrolyzed,and then hydrogenated into small molecule products during co-liquefaction.Therefore,clarifying influence of residuum on coal pyrolysis performance is an important thermochemical basis for regulating the process.The co-pyrolysis behavior of atmospheric residuum(AR)and Naomaohu coal(NMH)were investigated by TG,TG-FTIR and distributed activation energy model.The results showed that the peak temperature of the maximum rate of weight loss for the co-pyrolysis process was reduced by 7 ℃ compared with the theoretical value calculated by weighted average of AR and NMH pyrolysis alone,while the weight loss increased by 3％,the average activation energy decreased by 23.6 kJ/mol.In addition,the peak area of alkyl O-containing functional groups such as alcohols and ethers increased,whereas those of CO and CO2 decreased,suggesting that AR had a positive effect on NMH pyrolysis.Meanwhile,alkyl radicals from AR decomposition would combine with O-containing radicals generated from coal pyrolysis,thus resulting in a decrease of CO and CO2 by inhibiting breakage of carboxyl groups.This work will provide a scientific evaluation basis for revealing the influence of residuum on composition of coal liquefaction product during co-liquefaction.