Citation: LI Xian, ZHU Xian-qing, XIAO Li, RYUICHI Ashida, KOUICHI Miura, LUO Guang-qian, YAO Hong. Degradative solvent extraction of demineralized and ion-exchanged low-rank coals[J]. Journal of Fuel Chemistry and Technology, ;2014, 42(8): 897-904. shu

Degradative solvent extraction of demineralized and ion-exchanged low-rank coals

1.
1. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;

Corresponding author: LI Xian,
Received Date: 20 January 2014
Available Online: 5 May 2014
Fund Project: 华中科技大学自主创新研究基金(2013TS077)。 (2013TS077)

Dehydration and upgrading are essential pretreatment methods for efficient utilization of low-rank coal. In previous works the authors employed degradative solvent extraction method to dehydrate and upgrade low-rank coals and fractionate them into several fractions. For further study of this method, two low-rank coals (MM and LY) were pretreated by acid washing for demineralization or acid washing and Na/Co ion-exchange. The pretreated and raw coals were then extracted by 1-methylnaphthalene (1-MN) at 350 ℃ and fractionated into upgraded coal (UC), high molecular weight extract (Deposit), low molecular weight extract (soluble), as well as a little H₂O and gas products. The results show that both acid washing and ion-exchange enhance the yields and carbon contents of the two extracts. Ion-exchange obviously promotes the removal of oxygen-containing functional group during extraction. The yield of high molecular weight extract of demineralized MM increases from 3.5% to 9.5%, and the carbon content and oxygen content of low molecular weight extract of Na ion-exchanged LY are as high as 85.3% and less than 6.4%, respectively. Ion-exchange has a distinct influence on physical and chemical properties of the extracts. The influence of Na ion-exchange is especially remarkable. Thus, demineralization and ion-exchange have evident promotion for the degradative solvent extraction of low-rank coal.
- degradative solvent extraction,
- low rank coal,
- demineralization,
- ion-exchange,
- pretreatment
1. [1]
  [1] UENO Y. Low rank coal utilization by HWT[Z]. Fukuoka: APEC Clean Fossil Energy Technical and Policy Seminar, 2010.
2. [2]
  [2] 关珺, 何德民, 张秋民. 褐煤热解提质技术与多联产构想[J]. 煤化工, 2011, (6): 1-4. (GUAN Jun, HE De-min, ZHANG Qiu-min. The technology of improving lignite quality through pyrolysis and the concept of poly-generation[J]. Coal Chemical Industry, 2011, (6): 1-4.)
3. [3]
  [3] 吴克, 陈翀, 黄文益, 彭派, 吴春来. 一种用褐煤制取液体燃料的热溶催化方法及其使用的催化剂和溶剂: 中国, 200710032428[P]. 2008-05-21. (WU Ke, CHEN Chong, HUANG Wen-yi, PENG Pai, WU Chun-lai. Catalytic thermal conversion of lignite to liquid fuel and the preparation of catalyst and solvent: CN, 200710032428[P]. 2008-05-21.)
4. [4]
  [4] SATO Y, KUSHIYAMA S, TATSUMOTO K, YAMAGUCHI H. Upgrading of low rank coal with solvent[J]. Fuel Process Technol, 2004, 85(14): 1551-1564.
5. [5]
  [5] KATALAMBULA H, GUPTA R. Low-grade coals: A review of some prospective upgrading technologies[J]. Energy Fuels, 2009, 23(7): 3392-3405.
6. [6]
  [6] MAKGATO M H, MOITSHEKI L J, SHOKO L, KGOBANE B L, MORGAN D L, FOCKE W W. Alkali-assisted coal extraction with polar aprotic solvents[J]. Fuel Process Technol, 2009, 90(4): 591-598.
7. [7]
  [7] ⅡNO M, TAKANOHASHI T, OHSUGA H, TODA K. Extraction of coals with CS2-N-methyl-2-pyrrolidinone mixed solvent at room temperature: Effect of coal rank and synergism of the mixed solvent[J]. Fuel, 1988, 67(12): 1639-1647.
8. [8]
  [8] MIURA K, SHIMADA M, MAE K. Extraction of coal at 300 to 350 ℃ to produce precursors for chemicals[Z]. Pittsburgh: the 15th Annual International Pittsburgh Coal Conference, 1998.
9. [9]
  [9] MIURA K, HASEGAWA Y, ASHIDA R. Upgrading of brown coal using solvent extraction at high temperature[J]. Prepr Pap Am Chem Soc Div Fuel Chem, 2009, 54(2): 870-871.
10. [10]
  [10] WANNAPEERA J, LI X, WORASUWANNARAK N, ASHIDA R, MIURA K. Production of high-grade carbonaceous materials and fuel having similar chemical and physical properties from various types of biomass by degradative solvent extraction[J]. Energy Fuels, 2012, 26(7): 4521-4531.
11. [11]
  [11] LI X, ASHIDA R, MIURA K. Preparation of high-grade carbonaceous materials having similar chemical and physical properties from various low-rank coals by degradativesolvent extraction[J]. Energy Fuels, 2012, 26(11): 6897-6904.
12. [12]
  [12] LI X, OKUDA K, ASHIDA R, LUO G, YAO H, MIURA K. Carbon fibers preparation by low-molecular-weight fraction obtained from low-rank coal or biomass by degradative solvent extraction[Z]. Beijing: the 30th Annual International Pittsburgh Coal Conference, 2013.
13. [13]
  [13] LI X, ASHIDA R, MIURA K, LUO G, YAO H. Gasification of low-rank coal upgraded by degradative solvent extraction[Z]. Fukuoka: the 12th Japan-China Symposium on Coal and C1 Chemistry, 2013.
14. [14]
  [14] LI X, PRIYANTO D E, ASHIDA R, MIURA K. Two-stage conversion of low-rank coal and biomass into liquid fuel under mild condition[Z]. Pittsburgh: the 29th Annual International Pittsburgh Coal Conference, 2012.
15. [15]
  [15] PRIYANTO D E, LI X, ASHIDA R, MIURA K. Preparation of activated carbon from extraction UC of low-rank coals[Z]. Bali: the 19th Regional Symposium of Chemical Engineering, 2012.
16. [16]
  [16] MOCHIDA I, MORIGUCHI Y, SHIMOHARA T, KORAI Y, FUJITSU H, TAKESHITA K. Enhanced reactivity of some lignites by deashing pretreatment in hydrogen-transferring liquefaction under atmospheric pressure[J]. Fuel, 1983, 62(4): 471-473.
17. [17]
  [17] TYLER R J, SCHAFER H N. Flash pyrolysis of coals: Influence of cations on the devolatilizationbehaviour of brown coals[J]. Fuel, 1980, 59(7): 487-494.
18. [18]
  [18] SUGANO M, MASHIMO K, WAINAI T. Structural changes of lower rank coals by cationexchange[J]. Fuel, 1999, 78(8): 945-951.
19. [19]
  [19] MOTT R A, SPOONER C E. The calorific value of carbon in coal: The Dulong relationship[J]. Fuel, 1940, 19(226): 242.
20. [20]
  [20] FONG W S, KHALIL Y F, PETERS W A, HOWARD J B. Plastic behaviour of coal under rapid-heating high-temperature conditions[J]. Fuel, 1986, 65(2): 195-201.
21. [21]
  [21] MOONEY M. The viscosity of a concentrated suspension of spherical particles[J]. J Colloid Sci, 1951, 6(2): 162-170.
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