Desulfurization reactant gas-solid coupled diffusion within CaO grain aggregate in the flue gas of coal-fired power plant. Issue 4 (16th February 2016)

• Record Type: Journal Article
• Authors: Shang, J. Y.; Liu, Z. L.; Wang, S. L.; Wang, C. B.; Liu, H. C.
• Is Part Of: Energy sources. Volume 38:Issue 4(2016)
• Page Start: 494
• Page End: 502
• Publication Date: 2016-02-16
• Subjects: Aggregate -- gas-solid coupled diffusion -- limestone -- product layer -- SO2; Natural resources -- Periodicals; Energy consumption -- Periodicals; Energy consumption -- Climatic factors -- Periodicals; Energy conversion -- Periodicals; Energy conversion -- Environment aspects -- Periodicals; Power (Mechanics) -- Periodicals; 333.7905
• DOI: 10.1080/15567036.2012.763075
• Languages: English
• ISSNs: 1556-7036

Abstract

ABSTRACT: There is still room for further improvement in the SO2 removal efficiency of dry limestone desulfurization in the coal-fired power plant. The micro-structure of limestone particle is experimentally investigated by thermogravimetric analysis, scanning electron microscopy, and Mercury porosimeter. Gaseous diffusion theory and solid-state ion diffusion theory are coupled to derive dimensionless mass transfer equations, which are verified by thermogravimetric analysis in 3, 000 ppm SO2 . It is derived that solid-state ion diffusion controls the initial reaction stage. More attention should be paid to the fact that any pathway to improve solid-state ion diffusion velocity is useful for limestone desulfurization efficiency.