Experimental Study on SO₂ and NO_x Removal during Briquette Combustion

Abstract:

In this paper, the desulphurization of coals prepared briquettes using lime based products (calcium hydroxide and calcium carbonate) and sodium hydroxide as desulphurizing agents (DSA) was investigated in a vertically integrated experimental furnace. Meanwhile, the effect of sodium hydroxide on the denitrification was also studied. The results indicated that calcium carbonate as a DSA is more efficient for SO₂ removal during the char combustion, whereas hydrated lime and NaOH are efficient in both char and volatile combustion. For most of the coals, the desulfurization efficiencies in case of lime hydrated reaches over 80 %, whereas desulfurization efficiencies is below 70% when calcium carbonate is used as DSA. It was also found that NaOH can be used as denitrifying agent as well as desulphurizing agent, and the maximum denitrifying efficiencies by using NaOH denitrifying agents for coal A and coal B are 59% and 54%, respectively.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 741-745
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.741
• Online since: January 2013
• Authors: Lin Bo Qin, Jun Han, Tie Mi, Long Liu, Hao Wang, Xiu Lin Yang
• Keywords: Coal Combustion, Denitrifying Agents, Desulphurizing Agents, NO_x, Removal, SO₂

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