Effects of secondary reaction of primary volatiles on oil/gas yield and quality in oil shale pyrolysis

被引：0
|
作者：
Zhang Y.-M. [1 ]
Guan J.-T. [1 ]
Qiao P. [1 ]
Li J.-Z. [1 ]
Zhang W. [1 ]
机构：
[1] State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing
来源：
Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2021年 / 49卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Oil shale; Pyrolysis volatiles; Secondary reaction; Steam reforming;
D O I：
10.1016/S1872-5813(21)60046-4
中图分类号：
学科分类号：
摘要：
The reaction behaviors of primary volatiles from oil shale pyrolysis were investigated using a two-stage reactor under different in-situ thermal reaction conditions. The reaction parameters of secondary reactor, such as, reactor temperature, atmosphere and residence time, were studied for their effects on the pyrolysis oil/gas yield and quality. The results showed that the reaction temperature had profound influence on the oil and gas yield. The pyrolyzed shale oil and gas yield reduced by 15% and increased by 20% (mass) respectively, with the temperature of 2nd stage reactor increasing from 600 to 650 ℃ under optimized reaction condition of 1st stage. Comparing with nitrogen atmosphere, the liquid oil yield could be enhanced by 5% when steam was added as the reaction atmosphere in the second stage, and the corresponding oil was mainly concentrated in the gasoline and diesel distillations (that is, boiling point < 350 ℃). The GC-MS analysis illustrated that the secondary reaction at the residence time of 0−3 s was mainly pyrolysis while the presence of steam could increase the content of aromatics in the oil and meanwhile suppress the condensation of aromatics. When the residence time was greater than 3−5 s, the secondary reaction was mainly condensation of poly-aromatics, which led to the increase of coke. Meanwhile, the gasoline and diesel oil yield remained stable, and the VGO fractions decreased by about 30%. © 2021, Science Press. All right reserved.
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页码：924 / 932
页数：8
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共 30 条
  • [1] Statistical review of world energy, (2020)
  • [2] SHI Jian, LI Shu-yuan, MA Yue, Electron paramagnetic resonance study of Estonia oil shale and its pyrolysis products, J Fuel Chem Technol, 46, 1, (2018)
  • [3] ZHOU H R, LI H W, DUAN R H, YANG Q C., An integrated scheme of coal-assisted oil shale efficient pyrolysis and high-value conversion of pyrolysis oil, Energy, 196, (2020)
  • [4] YU Hai-long, JIANG Xiu-min, ZHAO Xiang, ZHOU Jun-hu, CEN Ke-fa, Study on mixed burning characteristics of oil shale and coal, J Fuel Chem Technol, 32, 3, pp. 274-277, (2004)
  • [5] DAI M, YU Z, Fang S, MA X., Behaviors, product characteristics and kinetics of catalytic co-pyrolysis spirulina and oil shale, Energy Convers Manage, 192, (2019)
  • [6] GAO Zi-xiang, Study on the pyrolysis characteristics of cellulose and hemicellulose in a fixed bed reactor, (2019)
  • [7] CHEN Z H, TIAN Y, LAI D G, ZHAN J H, GAO S Q., Oil shale pyrolysis in a moving bed with internals enhanced by rapid preheating in a heated drop tube, Energ Convers Manage, 224, (2020)
  • [8] LAI D G, CHEN Z H, LIN L X, ZHANG Y M, GAO S Q, XU G W., Secondary cracking and upgrading of shale oil from pyrolyzing oil shale over shale ash[J], Energy Fuels, 29, 4, pp. 2219-2226, (2015)
  • [9] HU C S, LIU C, LIU Q Y, ZHANG H Y, WU S L, XIAO R., Effects of steam to enhance the production of light olefins from ex-situ catalytic fast pyrolysis of biomass, Fuel Process Technol, 210, (2020)
  • [10] EFTHYMIOS K, YANG W H, WLODZIMIERZ B., Production of liquid feedstock from biomass via steam pyrolysis in a fluidized bed reactor, Energy Fuels, 27, 8, pp. 4748-4759, (2013)
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