CO2 gasification rate analysis of coal in molten blast furnace slag-For heat recovery from molten slag by using a chemical reaction

被引：37

作者：

Li, Peng ^{[1
,2
]}

Lei, Wei ^{[2
]}

Wu, Bin ^{[2
]}

Yu, Qingbo ^{[1
]}

机构：

[1] Northeastern Univ, Sch Met & Mat, Shenyang 110819, Liaoning, Peoples R China

[2] CISDI Ind Furnace CO LTD, Chongqing 400013, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2015年 / 40卷 / 03期

关键词：

Gasification; Coal; Molten blast furnace slag; Energy recovery; Kinetic; ELEVATED-TEMPERATURES; CO2/CHAR GASIFICATION; CARBON-DIOXIDE; LATENT-HEAT; KINETICS; FEASIBILITY; CHARS; STEAM; MECHANISM;

D O I：

10.1016/j.ijhydene.2014.11.091

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The coal gasification rate of Datong coal in molten blast furnace slag using carbon dioxide as gasifying agent was studied at the temperature ranging from 1473 to 1723 K. The kinetic model was developed. The influence of reaction temperature and coal/slag mass ratio in the reaction rate was analyzed. The reaction rate has a strong dependence on reaction temperature and coal/slag ratio. The peak value of reaction rate increases firstly, and then levels off, or even decreases a little as temperature increases. Within the same reaction time, the carbon conversion and peak value of reaction rate increase with increasing coal/slag ratio. Molten BF slag is active catalyst for carbon gasification. The volume reaction model A(1) has the best fit on coal gasification in molten BF slag. The kinetic parameters applicable to volume reaction model at high temperature with different coal/slag ratios were obtained. The value of intrinsic activation energy is between 50 kJ/mol and 90 kJ/mol. The global rate equation that includes these parameters was developed. Rate = dx/dt = k(0i) exp( - Eqt/RT)(1 - x) Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：1607 / 1615

页数：9

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