FURTHER-STUDIES OF GIESELER FLUIDITY DEVELOPMENT IN NEW-ZEALAND COALS

被引:17
作者
CLEMENS, AH
MATHESON, TW
机构
[1] Coal Research Association of New Zealand (Inc.), Lower Hutt
关键词
OXIDATION; GIESELER FLUIDITY; WEBB COAL;
D O I
10.1016/0016-2361(92)90008-C
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The hydrogen donor ability of fresh samples of a Webb coal with high Gieseler fluidity is shown to be greater than that of samples of the same coal after oxidation has caused a significant decline in fluidity. Model compounds containing hydrogen donor sites similar to those in coal are found to donate hydrogen when heated through a Gieseler temperature profile and to undergo oxidation at these sites under the conditions used to destroy fluidity in coals. The addition of sulphided metal catalysts is found to destroy Gieseler fluidity. The results support the theory that a major factor in fluidity development is a supply donor hydrogens involved in the generation of low molecular weight 'solvating' species.
引用
收藏
页码:193 / 197
页数:5
相关论文
共 22 条
  • [1] DEPENDENCE OF COAL LIQUEFACTION BEHAVIOR ON COAL CHARACTERISTICS .3. STATISTICAL CORRELATIONS OF CONVERSION IN COAL-TETRALIN INTERACTIONS
    ABDELBASET, MB
    YARZAB, RF
    GIVEN, PH
    [J]. FUEL, 1978, 57 (02) : 89 - 94
  • [2] RELATIVE RATE CONSTANTS OF HYDROGEN TRANSFER TO BENZYL RADICAL
    BOCKRATH, B
    BITTNER, E
    MCGREW, J
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1984, 106 (01) : 135 - 138
  • [3] Bockrath B. C., 1983, COAL SCI, V2, P65
  • [4] THE EFFECT OF DECACYCLENE ON COAL FLUIDITY
    CLEMENS, AH
    MATHESON, TW
    [J]. FUEL, 1987, 66 (07) : 1009 - 1010
  • [5] OXIDATION STUDIES OF HIGH FLUIDITY COALS
    CLEMENS, AH
    MATHESON, TW
    LYNCH, LJ
    SAKUROVS, R
    [J]. FUEL, 1989, 68 (09) : 1162 - 1167
  • [6] A RAPID AND CONVENIENT METHOD FOR MEASURING THE SWELLING OF COALS BY SOLVENTS
    GREEN, TK
    KOVAC, J
    LARSEN, JW
    [J]. FUEL, 1984, 63 (07) : 935 - 938
  • [7] MULTIPLE MECHANISMS FOR THE LOSS OF COKING PROPERTIES CAUSED BY MILD AIR OXIDATION
    LARSEN, JW
    LEE, D
    SCHMIDT, T
    GRINT, A
    [J]. FUEL, 1986, 65 (04) : 595 - 596
  • [8] THE MOLECULAR-BASIS OF COAL THERMOPLASTICITY
    LYNCH, LJ
    WEBSTER, DS
    SAKUROVS, R
    BARTON, WA
    MAHER, TP
    [J]. FUEL, 1988, 67 (04) : 579 - 583
  • [9] LYNCH LJ, 1984, NATO ASI SER C-MATH, V124, P617
  • [10] HYDROGEN-TRANSFER-PROMOTED BOND SCISSION INITIATED BY COAL FRAGMENTS
    MCMILLEN, DF
    MALHOTRA, R
    HUM, GP
    CHANG, SJ
    [J]. ENERGY & FUELS, 1987, 1 (02) : 193 - 198