A STUDY ON THE INVESTIGATION OF IMPROVEMENT IN COAL LIQUEFACTION PRODUCT EFFICIENCY

Year 2019, Volume: 20 Issue: 4, 406 - 412, 30.12.2019

Aydan Aksoğan Korkmaz , İsmail Bentli

https://doi.org/10.18038/estubtda.499819

Cited By: 1

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

Liquefaction, Lignite, Asphaltane, Preasphaltane, Char

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.
• [11] Gözmen B, Artok L, Erbatur G, Erbatur O. Direct liquefaction of high-sufur coals: effects of the catalyst, the solvent and the mineral matter. Energy and Fuels 2002; 16:1040-1047.
• [12] Hesenov A, Gül Ö, Gafarova P, Erbatur O, Schobert H.H. Distribution of main product fractions in co-liquefaction of high-sulfur lignites blended with petroleum heavy bottoms. Prepr.Pap.-Am.Chem.Soc., Div.Fuel Chem. 2004; 49:500-502. [13] Gül Ö, Gafarova P, Hesenov A, Schobert H.H, Erbatur O. Catalytic direct liquefaction of high sülfür lignites: temperature and solvent effect on product distributions. Prepr.Pap.-Am.Chem.Soc., Div.Fuel Chem. 2004; 49:559-561.
• [14] Omais B, Courtiade M, Charon N, Thiebaut D, Quignard A. Characterization of oxygenated species in coal liquefaction products: An overview. Energy and Fuels 2010; 24:5807-5816.
• [15] Li X, Xue Y, Feng J, Yi Q, Li W, Guo X, Liu K. Co-pyrolysis of lignite and Shendong coal direct liquefaction residue. Fuel 2015; 144:342-348.
• [16] You Q, Wu S.Y, Wu Y.Q, Huang S, Gao J.S, Shang J.X, Min X.J, Zheng H.A. Product distributions and characterizations for integrated mild-liquefaction and carbonization of low rank coals. Fuel Processing Technology 2017; 156:54-61.
• [17] Aksoğan Korkmaz A. Zenginleştirme yöntemlerinin değişik linyitlerin piroliz ürün verimleri üzerine etkisi. Doktora Tezi, İnönü Üniversitesi, Malatya, Türkiye, 2017.
• [18] Speight J.G. The Chemistry and Technology of Coal. 2nd ed. New York, NY, USA: Marcel Dekker Inc., 1994.
• [19] Methakhu, S, Ngamprasertsith S, Prasassarakich P. Improvement of oil yield and its distribution from coal extraction using sulfide catalysts. Fuel 2007; 86:2485-2490.
• [20] Karaca H, Koyunuoğlu C. Co-liquefaction of Elbistan lignite and biomass Part I: The effect of the process parameters on the conversion of liquefaction products. Energy Sources, Part A: Recovery, Utilization and Environmental Effects 2010; 32:495-511.
• [21] Wang Z, Shui H, Pan C, Li L, Ren S, Lei Z, Kang S, Wei C, Hu J. Structural characterization of the thermal extracts of lignite. Fuel Processing Technology 2014; 120:8-15.