A STUDY ON THE INVESTIGATION OF IMPROVEMENT IN COAL LIQUEFACTION PRODUCT EFFICIENCY
Abstract
The aim of this study is to improvement the yields of Malatya-Arguvan lignite liquefaction products (char, preasphaltene, asphaltene, oil-gas). For this purpose, the liquefaction experiments of coal which firstly raw and then enriched by spiral have been carried out. The chemical characterizations of the obtained products were determined by proximate and ultimate analysis. The composition of the oil was identified by GC-MS. As a result of the enrichment, the char yield decreased by 9.28% whereas the preasphaltene yield increased by 5.31% and the oil + gas yield increased by 4.18%. Total conversion increased from 47.57% to 56.85%. It has been concluded that the enrichment process has a positive effect on the liquefaction yields.
Keywords
References
- [1] Lievens C, Ci D, Bai Y, Ma L, Zhang R, Chen J.Y, Gai Q. A study of slow pyrolysis of one low rank coal via pyrolysis-GC/MS. Fuel Processing Technology 2013; 116:85-93.
- [2] Xu Y, Zhang Y, Wang Y, Zhang G, Chen L. Gas evolution characteristics of lignite during low-temperature pyrolysis. Journal of Analytical and Applied Pyrolysis 2013; 104:625-631.
- [3] Meng F, Yu J, Tahmasebi A, Han Y, Zhao H, Lucas J, Wall T. Characteristics of chars from low-temperature pyrolysis of lignite. Energy Fuels 2013; 28:275-284.
- [4] He Q, Wan K, Hoadley A, Yeasmin H, Miao Z. TG-GC-MS study of volatile products from Shengli lignite pyrolysis. Fuel 2015; 156:121-128.
- [5] Li P, Zong Z.M, Liu F.J, Wang Y.G, Wei X.Y, Fan X, Zhao Y.P, Zhao W. Sequential extraction and characterization of liquefaction residue from Shenmu-Fugu subbituminous coal. Fuel Processing Technology 2015; 136:1-7.
- [6] Rahman M, Adesanwo T, Gupta R, Klerk A. Effect of direct coal liquefaction conditions on coal liquid quality. Energy and Fuels 2015; 29:3649-3657.
- [7] Kanca A, Dodd M, Reimer J.A, Uner D. Following the structure and reactivity of Tunçbilek lignite during pyrolysis and hydrogenation. Fuel Processing Technology 2016; 152:266-273.
- [8] Kural O. Coal Resources, Properties, Utilization, Pollution. Istanbul, Turkey: Ozgun Press, 1994.
- [9] Ekinci E, Yardim F, Razvigorova M, Minkova V, Goranova M, Petrov N, Budinova T. Characterization of liquid products from pyrolysis of subbituminous coals. Fuel Processing Technology 2002; 77-78:309-315.
- [10] Karaca H, Koyunuoğlu C. The co-liquefaction of Elbistan lignite and biomass Part II: The characterization of liquefaction products. Energy Sources, Part A: Recovery, Utilization and Environmental Effects 2010; 32:1167-1175.