Enhanced capture of elemental mercury by bamboo-based sorbents

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• 作者：Zengqiang Tan ; Jun Xiang ; ^{xiangjun@mail.hust.edu.cn} ; Sheng Su ; ^{susheng_sklcc@hotmail.com} ; Hancai Zeng ; Changsong Zhou ; Lushi Sun ; Song Hu ; Jianrong Qiu
• 关键词：Mercury ; Bamboo charcoal ; KI ; Mechanism study
• 刊名：Journal of Hazardous Materials
• 出版年：2012
• 出版时间：15 November, 2012
• 年：2012
• 卷：239-240
• 期：Complete
• 页码：160-166
• 全文大小：618 K

文摘

To develop cost-effective sorbent for gas-phase elemental mercury removal, the bamboo charcoal (BC) produced from renewable bamboo and KI modified BC (BC-I) were used for elemental mercury removal. The effect of NO, SO₂ on gas-phase Hg⁰ adsorption by KI modified BC was evaluated on a fixed bed reactor using an online mercury analyzer. BET surface area analysis, temperature programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS) were used to determine the pore structure and surface chemistry of the sorbents. The results show that KI impregnation reduced the sorbents¡¯ BET surface area and total pore volume compared with that of the original BC. But the BC-I has excellent adsorption capacity for elemental mercury at a relatively higher temperature of 140 ¡ãC and 180 ¡ãC. The presence of NO or SO₂ could inhibit Hg⁰ capture, but BC-I has strong anti-poisoning ability. The specific reaction mechanism has been further analyzed.