An appropriate kinetic model for well-preserved algal kerogens

被引:87
作者
Burnham, AK
Braun, RL
Coburn, TT
Sandvik, EI
Curry, DJ
Schmidt, BJ
Noble, RA
机构
[1] EXXON PROD RES CO,HOUSTON,TX 77252
[2] STATOIL,N-4035 STAVANGER,NORWAY
[3] ARCO E&P TECHNOL,PLANO,TX 75023
关键词
D O I
10.1021/ef950142s
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
While the broadness of the pyrolysis profile of most kerogens is described well by a parallel reaction model, the pyrolysis profile at a constant heating rate for certain well-preserved algal kerogens is narrower than can be described by a single first-order reaction. Further, these kerogens show an acceleratory period under isothermal conditions that is inconsistent with any parallel or nth-order reaction model. Three different models (serial, Bouster, and three-parameter) are tested against isothermal and nonisothermal pyrolysis data for a few samples, with the conclusion that the three-parameter model fits well and is the most stable and reliable. The three-parameter model reduces to a first-order model when the acceleration parameter is zero. The overall activation energy and frequency factor from this model are very close to those of the T-max-shift method recommended earlier.
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页码:49 / 59
页数:11
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