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bce ›› 2018, Vol. 52 ›› Issue (6): 23-30.doi: 10.3969/j.issn.1673-5854.2018.06.004

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Characteristic Analysis of Co-pyrolysis Products of Lignite and Soybean Pod

LI Cuihua1, HE Xuanming1,2, LI Chong1, FENG Dongzheng1, LIU Jing1, KE Ping1   

  1. 1. Hubei Coal Conversion and New Carbon Materials Key Laboratory, Wuhan 430081, China;
    2. School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
  • Received:2017-06-20 Online:2018-11-30 Published:2018-12-12

Abstract: The characteristics of co-pyrolysis products of lignite and soybean pod were studied by using homemade carbonization apparatus and the influences of different soybean pod ratios and blending Fe2O3 in lignite on the yields were also studied.The characteristics of co-pyrolysis products were analyzed by FT-IR, GC-MS, SEM-EDX and UV-vis, meanwhile, the char was used to study the adsorption of methylene blue.The results showed that the yield of pyrolysis tar rose to 11.98% with the blending ratio of 30%, which was increased by 44.86% compared to lignite pyrolysis alone and reached the most-positive deviation to the theoretical values(0.8%) and the results indicated that the addition of soybean pod had synergistic effect of promoting the production of tar.The addition of soybean pod could facilitate the breakage of oxygen-containing heterocycles, increase the number of straight-chain alkanes and reduce of aromatic compounds in co-pyrolysis tar. It could also enhance the quantity of oxygen-containing groups and the surface roughness of co-pyrolysis char. Blending of Fe2O3 increased the phenols and alcohols content in co-pyrolysis tar, and the folds of the char were more obvious. The methylene blue removal rate of co-pyrolysis char reached 33.62%, which was risen by 8.84% compared with that of coal char. And the removal rate of co-pyrolysis char with Fe2O3 reached 55.57%, which was risen by 65.29% compared with that of co-pyrolysis char.

Key words: co-pyrolysis, tar, char, functional group, morphology

CLC Number: