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Biomass Chemical Engineering ›› 2019, Vol. 53 ›› Issue (4): 26-30.doi: 10.3969/j.issn.1673-5854.2019.04.004

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Characteristics of Low Temperature Co-pyrolysis Products of Low-rank Coal and Corncob

Ping KE(),Xuanming HE*(),Jing LIU,Dongzheng FENG   

  1. Hubei Coal Conversion and New Carbon Materials Key Laboratory, Wuhan University of Science and Technology, Wuhan 430081, China
  • Received:2018-04-02 Online:2019-07-30 Published:2019-08-05
  • Contact: Xuanming HE E-mail:keping_WUST@163.com;xmingh999@126.com
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Low temperature distillation equipment was used to study the low temperature co-pyrolysis of lignite and corncob under different proportions. The results showed that when the corncob content was 30%, the tar yield reached 11.70%, which was 53.75% higher than that of the lignite mono-pyrolysis. With the addition of corncob, the contents of CO, CH4 and H2 in pyrolysis gas gradually increased. The results of GC-MS showed that as adding 30% corncob, aliphatic content increased from 24% to 30.67%, the phenol content increased from 6.29% to 18.49%, heteroatom content decreased from 29.75% to 13.33%, which achieved a substantial pyrolysis of tar and high-quality tar generation. The SEM, BET and heat value analysis of pyrolysis char showed that the surface of co-pyrolysis char became more rough, and the pore structure was improved. The heat value of co-pyrolysis char was obviously higher than the lignite pyrolysis separately.

Key words: lignite, corncob, co-pyrolysis, char

CLC Number: