燃料化学学报2016，Vol.44Issue(11)：1310-1317,8.
桦甸油页岩热解过程中热沥青的组成变化规律
Variation of chemical composition of thermal bitumen during Huadian oil shale pyrolysis
摘要
Abstract
The variation of chemical composition of thermal bitumen during Huadian oil shale pyrolysis was studied. Spent shale samples obtained by retorting oil shale at 300-550℃ were subjected to sequential Soxhlet extraction-acid pickling-Soxhlet extraction procedures to obtain free bitumen ( FB ) , bitumen bound with carbonates ( BB-1 ) and bitumen bound with silicates ( BB-2 ) . The bitumen samples were characterized by liquid chromatography fractionation, FT-IR and GC-MS. The results show that the total bitumen yield first increases and then decreases with increasing temperature from 300 to 550℃, and reached the maximum value of 4 . 63% at 400℃. Especially, the intense vaporization and decomposition of bitumen occurring at 400-450 ℃ causes a dramatic decrease in bitumen yield from 4. 63% to 0. 98%. Decarboxylation of aliphatic acids, decomposition of esters and cracking of long-chain alkanes take place at 350-450 ℃, which decreases the contents of acids and esters in FB and shortens the chain length of alkanes. The carboxylic acids derived from kerogen pyrolysis can react with carbonates to form carboxylates, leading to a high amount of aliphatic acids in 400 ℃ BB-1 (78. 82%). The contents of oxygenated compounds (acids, esters and phenols) and alkanes of 400℃ BB-2 are 80. 79% and 19. 21%, respectively, due to the combination between oxygenated compounds and clay minerals, and the insertion of alkanes into the interlayer space of montmorillonite.关键词
油页岩/热解/热沥青/化学组成Key words
oil shale/pyrolysis/thermal bitumen/chemical composition分类
化学化工引用本文复制引用
畅志兵,初茉,张超,白书霞,林浩..桦甸油页岩热解过程中热沥青的组成变化规律[J].燃料化学学报,2016,44(11):1310-1317,8.基金项目
The project was supported by the Major State Basic Research Development Program of China (973 program,2014CB744301).国家重点基础研究发展规划(973计划,2014CB744301)资助 （973 program,2014CB744301）
