Aksoğan Korkmaz, AydanBentli, İsmail2021-12-292021-12-292019KORKMAZ A. A,BENTLİ İ (2019). A STUDY ON THE INVESTIGATION OF IMPROVEMENT IN COAL LIQUEFACTION PRODUCT EFFICIENCY. Eskişehir Technical University Journal of Science and and Technology A- Applied Sciences and Engineering, 20(4), 406 - 412. Doi: 10.18038/estubtda.4998192667-4211https://doi.org/10.18038/estubtda.499819https://hdl.handle.net/11616/44622https://search.trdizin.gov.tr/yayin/detay/359279Abstract: The 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 beencarried 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% whereasthe 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/openAccessArticle20440641210.18038/estubtda.499819359279