FUEL & CHEMICAL PROCESSES ›› 2011, Vol. 42 ›› Issue (5): 5-8.

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Composition analysis of extraction residue fromsupercritical methanolysis of lignite

Shen Gaiyan1   Zhou Yan1   Qiu Lili1    Xu Bin1  Wei Xianyong1,2   

  1. 1. Chemical Engineering and Technology College of Wuhan University of Science and Technology, Wuhan 430081, China;
    2. Key Laboratory of the Ministry of Education for Coal Processing and Efficient Clean Utilization of China University of Mining and Technology, Xuzhou 221008, China

  • Online:2011-09-30

Abstract:

 A study is carried out for the extraction residue from the supercritical methanolysis of lignite through proximate analysis, elemental analysis, ash composition analysis and calorific analysis. The results show that the water content of extraction residue from the methanolysis of lignite is 6.93%~11.35%, ash content is up to 22.10%~24.46% and volatile matter is 39.75%~45.53%. The extraction residue from the methanolysis of lignite has no caking and coking properties and its carbon content is 66.74%~76.03%； its hydrogen content is 4.51%~5.06%; its nitrogen content is 0.95%~0.99%; its sulfur content is 2.10%~2.57% and its oxygen content is 15.79%~25.13%；the C/H atomic ratios of extraction residue from methandysis of lignite are in the range from 1.214 to 1.302. The ash component of the extraction residue from the methanolysis of lignite contains mainly SiO2, Al2O3, CaO and Fe2O3, in which SiO2 content is up to 47%~54%. The calorific value of the extraction residue from the methanolysis of lignite is 20.21~22.65MJ/kg.

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