Preparation and Adsorption Property of Modified Activated Carbon for Purification of HCN in Closed Carbide Furnace Tail Gas

Abstract:

For utilization of CO contained in tail gases of coal chemical industry, adsorption purification of HCN in closed carbide furnace tail gas was investigated on an activated carbon was modified with KOH (AC1) and the other activated carbon was modified with NaOH and sulfonated cobalt phthalocyanine (AC2). The experiment results show that two kinds of modified activated carbons are proved to be effective adsorbents for HCN removal, but the HCN adsorption capacity for AC2 is 1.47 times that for AC1. For AC2 adsorbent, the purification efficiency increased with the increase of oxygen content and adsorption temperature. The results show that, 1.5% for optimum oxygen content and 90°C for optimum adsorption temperature. The specific surface and the pore structure properties of AC2 adsorbent before and after HCN adsorption were tested by N2 adsorption experiments. The N2 adsorption tests show that, the predominant adsorption of HCN occurs in the micropores in radius 7.4～16.6 Å. Deactivated AC2 adsorbent could be restored to the original activated state, even after several regenerations.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 1862-1866
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.1862
• Online since: February 2012
• Authors: Ming Jiang, Ping Ning, Zhong Hua Wang, Yang Wei Bai, Wei Chen, Wei Zhang, Rui Bo Wang
• Keywords: Adsorption, Carbide Furnace Tail Gas, HCN, Modified Activated Carbon, Purification

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