Aksoğan Korkmaz, AydanBentli, İsmail2021-06-012021-06-012019Aksoğan Korkmaz, A., Bentli, İ. (2019). A study on the investıgation of improvement in coal liquefaction product efficiency. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering, 20 (4), 406-412. DOI: 10.18038/estubtda.4998191302-3160https://doi.org/10.18038/estubtda.4998192667-4211https://hdl.handle.net/20.500.12899/164The aim of this study is to improve the yields of Malatya-Arguvan lignite liquefaction products (char, preasphaltene, asphaltene, oil-gas). For this purpose, the liquefaction experiments of coal which was firstly raw and then enriched by spiral have been carried out. The chemical characterizations of the obtained products have been 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.eninfo:eu-repo/semantics/openAccessLiquefactionLigniteAsphaltanePreasphaltaneCharCoal liquefactionKömür sıvılaştırmaSıvılaşmaLinyitAsfaltanPreasfaltanOil-gasLignite liquefactionLinyit sıvılaştırmaArticle10.18038/estubtda.499819204406412