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Citation: Zhong Qin. Thermogravimetric Study on the Reaction of CaO with SO₂[J]. Chinese Journal of Applied Chemistry, ;1995, 12(3): 36-39. shu

Thermogravimetric Study on the Reaction of CaO with SO₂

Zhong Qin

Chemical Engineering Institute, Nanjing University of Science and Technology, Nanjing 210094

Received Date: 16 August 1994
Revised Date: 30 December 1994

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 followed by a product-layer diffusion controlled reaction with an activation energy of 75.2kJ/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 affected the sulfation. A 59% CaO conversion was achieved in 30s at 1000℃ and 1×10²pa.
- SO₂,
- limestone,
- sulfation,
- thermogravimetry
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Thermogravimetric Study on the Reaction of CaO with SO₂