OXIDATION-KINETICS OF WYOMING POWDER RIVER BASIN COAL IN O-2 BETWEEN 295-K AND 398-K

被引：21

作者：

KELEMEN, SR

FREUND, H

机构：

[1] Corporate Research Science Laboratory, Exxon Research and Engineering Company, Annandale, New Jersey 08801

来源：

ENERGY & FUELS | 1990年 / 4卷 / 02期

关键词：

D O I：

10.1021/ef00020a007

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：

We have quantified the reaction of O2 with Powder River Basin subbituminous coal between 295 and 398 K. Initial oxidation produced mainly gaseous CO2 and H2O as oxidation products. The rate of increase of CO2 can be fit to a single kinetic expression. The apparent activation energy is 14.6 kcal/mol with an A factor of 4.6 × 106 (O/C) (day)−1. Measurements on the rate of CO2 formation at 351 K at different partial pressures of O2 in helium shows nearly a first-order dependence in O2 below 100 mmHg but a dependence approaching zero order at high pressures. The total amount of surface and bulk organic oxygen remains almost constant during the initial oxidation period. The oxidation rate parameters are discussed and compared with previous results from Illinois No. 6 coal. © 1990, American Chemical Society. All rights reserved.

引用

页码：165 / 171

页数：7

共 32 条

[1] AN EVALUATION OF THE POTENTIAL OF ESCA (ELECTRON-SPECTROSCOPY FOR CHEMICAL APPLICATIONS) (AND OTHER SPECTROSCOPIC TECHNIQUES) IN THE SURFACE AND BULK CHARACTERIZATION OF KEROGENS, BROWN COAL AND GILSONITE [J].