Hydrocarbon High-efficiency Utilization Technology Research Center, Shaanxi Yanchang Petroleum (Group) Company Limited
Engineering Research Center for High-efficiency Utilization of Fossil Hydrocarbon Research of Petroleum and Chemical Industry

为考察不同热解条件对煤加压热解产物分布和产品品质的影响,利用加压热重装置研究了不同升温速率(10℃/min,20℃/min,30℃/min,40℃/min)、压力(1.0MPa,2.0MPa,3.0MPa,4.0MPa)和气氛(100%N2,100%CO2,50%CO2+50%H2)对油坊梁煤加压热解特性的影响。结果表明:在反应终温800℃、升温速率30℃/min、100%N2条件下,受加压抑制挥发分的逸出与扩散的影响,失重曲线、失重速率曲线及最大失重速率对应的峰温整体向高温侧移动,失重率由1.0MPa时的24.52%减小至4.0MPa时的19.46%。与100%N2气氛相比,100%CO2和50%CO2+50%H2气氛下失重率分别增加2.29%和1.32%。受高氢分压下较多的氢分子参与自由基的加氢饱和、高压促使挥发分发生二次反应,以及CO2与重质焦油发生重整反应的影响,压力由1.0MPa升高至4.0MPa时,焦油的碳的质量分数由82.12%增加至85.02%,氢的质量分数由6.44%增加至7.18%,n(H)∶n(C)由0.078增加至0.084。焦油中轻油、酚油和萘油的质量分数增加,沥青质的质量分数下降。焦油中脂肪烃化合物的相对含量降低2.08%,芳香烃化合物和酚类化合物的相对含量分别增加3.28%和1.87%,焦油的轻质化效果明显。

In order to investigate the effects of different pyrolysis conditions on the distri-bution and quality of coal pressurized pyrolysis products, the influences of heating rate (10 ℃/min,diffusion by the pressurization. The weight loss decreases from 24.52% at 1.0 MPa to 19.46% at 4.0 MPa. Compared with the 100%N2 atmosphere, the weight loss under 100%CO2 and 50%CO2+50%H2 atmosphere increase by 2.29% and 1.32%, respectively. Due to the effects of strengthened hydrogenation saturation process under the high hydrogen partial pressure, the pro-moted secondary reaction of volatile by the high pressure, and the reforming reaction of CO2 with the heavy tar, the mass fraction of carbon in tar increases from 82.12% to 85.02% as the pres-sure raises from 1.0 MPa to 4.0 MPa, the mass fraction of hydrogen increases from 6.44% to 7.18%, and the n(H)∶n(C) increases from 0.078 to 0.084 correspondingly. The mass fraction of light oils, phenol oils and naphthalene oils in the tar increases while the mass fraction of as-phaltene decreases. At the same time, the relative content of aliphatic hydrocarbon compounds in tar decreases by 2.08% and the relative content of aromatic hydrocarbons and phenolic com-pounds increases by about 3.28% and 1.87%, respectively. Hence the lightening effect of tar is noticeable.

陕西省重点研发计划项目(2023-YBGY-081)和陕西延长石油(集团)有限责任公司科技项目(ycsy2023ky-B-80).

黄 勇,高 亚 男,刘 丹,等.油 坊 梁 煤 加 压 热 解 特 性 的 实 验 研 究 [J].煤 炭 转 化,2023,46(5):31-41

HUANG Yong,GAO Yanan,LIU Dan,et al.Experimental study on pressurized pyrolysis characteristics of Youfangliang coal[J].Coal Conversion,2023,46(5):31-41