石炭とチャーの固体¹³C-NMR分析

石炭の水添ガス化反応研究への応用

抄録

The coal gasification process in a flash hydropyrolysis was investi-gated by comparing CP/MAS ¹³C-NMR spectra of the raw coal and its solid product (char).
The results with Loy Yang coal indicated that aliphatic carbon and oxygen bonded to aromatic carbon initially existed in coal disappeared from chars produced at temperatures higher than 705°C, and that the amount of aromatic carbon remained constant among coal and chars at 705, 725 and 750°C, and then it was progressively reduced as gasification temperature was raised (800, 875 and 950°C).
Reduction of aromatic carbon in pyrolysis at about 900°C occurred with similar rates among eight coals ranging from lignite to low-rank bituminous coal excespt for two coals.