CaO与SO2反应的热重法研究

摘要/Abstract

摘要： 真空下CaO与SO₂的TG反应按两阶段进行,即初始快速(约7s)和产物层扩散控制反应,活化能分别为36.7、75.2kJ/mol.石灰石类型、微孔结构、颗粒尺寸和温度影响反应速率,在1000℃和1×10²pa反应30s,CaO转化率达59%.

关键词: SO₂, 石灰石, 硫酸盐化反应, 热重法

Abstract: The high temperature sulfation of CaO with SO₂ has been investigated by TG method under vacuum, Experimental data indicated that the sulfation process was a two-stage reaction, a very fast surface reaction with an activation energy of 36.7kJ/mol followedby a product-layer diffusion controlled reaction with an activation energy of 75.2 kJ/mol.The initial period was about 7s.This process of sulfation was affected by limestone type,micro structure, particle size and temperature, while the SO₂ concentration hardly affectedthe sulfation.A 59% CaO conversion was achieved in 30s at 1000℃ and 1×10²pa.

Key words: SO², limestone, sulfation, thermogravimetry

钟秦. CaO与SO₂反应的热重法研究[J]. 应用化学, 1995, 0(3): 36-39.

Zhong Qin. Thermogravimetric Study on the Reaction of CaO with SO₂[J]. Chinese Journal of Applied Chemistry, 1995, 0(3): 36-39.

[1]	王学杰, 游金宗. 司他夫定的热分解机理及动力学[J]. 应用化学, 2011, 28(06): 709-715.
[2]	张黎明, 李霞, 曹井国. 大黄游离羟基蒽醌的TG-DTA分析[J]. 应用化学, 2006, 23(9): 1058-1060.

CaO与SO₂反应的热重法研究

Thermogravimetric Study on the Reaction of CaO with SO₂

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