CIESC Journal ›› 2015, Vol. 66 ›› Issue (3): 1104-1110.DOI: 10.11949/j.issn.0438-1157.20141312

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Characteristics of light gases evolution during oil shale pyrolysis

BAI Jingru, LIN Weisheng, PAN Shuo, WANG Qing   

  1. Engineering Research Centre of Oil Shale Comprehensive Utilization, Ministry of Education, Northeast Dianli University, Jilin 132012, Jilin, China
  • Received:2014-08-27 Revised:2014-11-02 Online:2015-03-05 Published:2015-03-05
  • Supported by:

    supported by the National Natural Science Foundation of China (51276034).

油页岩低温热解过程中轻质气体的析出特性

柏静儒, 林卫生, 潘朔, 王擎   

  1. 东北电力大学油页岩综合利用教育部工程研究中心, 吉林省 吉林市 132012
  • 通讯作者: 柏静儒
  • 基金资助:

    国家自然科学基金项目(51276034)。

Abstract:

Pyrolysis experiments were conducted on a unit of thermogravimetric-infrared-mass spectrometry at heating rate of 20℃·min-1 to examine the evolution characteristics of light gases from low temperature pyrolysis of oil shale obtained from four locations (FS, HD, MM and NM). The time-resolved light gases including H2, H2O, CO, CO2, CH4 and CnHm were investigated for their release rates and accumulated productions varying with the change of temperature. Light gases evolved at temperatures in the range of 180—540℃. Release rate curves for H2, CH4 and CnHm mainly resembled each other, appearing in Gaussian distribution. Release rate curves for CO and CO2 smoothly increased first and then accelerated sharply. After reaching a maximum the curves dropped quickly till the end of evolution. Change of H2O release rate was complicated. Release rates of internal water, mineral water and pyrolysis water of oil shale in three stages all increased to a maximum and then leveled off.

Key words: oil shale, pyrolysis, light gas, evolution characteristic

摘要:

为研究油页岩低温热解过程中轻质气体的析出特性,在热重-红外-质谱三联机上对国内有代表性的4个地区(FS、HD、MM和NM)油页岩以20℃·min-1的升温速率进行了热解实验研究,考察了H2、H2O、CO、CO2、CH4和CnHm 6种轻质气体的析出速率和累积产量随温度变化的规律。实验结果表明:油页岩轻质气体析出的温度范围在180~540℃;H2、CH4和CnHm的析出速率曲线大致相似,呈高斯分布,CO和CO2的析出速率则是先缓慢增加随后快速增加,达到最大值后又快速下降,直到析出结束,H2O的析出速率相对比较复杂,油页岩的内水、矿物质的结晶水和热解水在3个阶段析出,析出速率都是先增大,达到最大值而后减小。

关键词: 油页岩, 热解, 轻质气体, 析出特性

CLC Number: