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Understanding the effect of thiophene sulfur on brominated petroleum coke for elemental mercury capture from flue gases
RSC Advances ( IF 3.9 ) Pub Date : 2021-1-22 , DOI: 10.1039/d0ra10208c Yi Xiao 1 , Xiuyun Liu 1 , Yongfa Diao 2
RSC Advances ( IF 3.9 ) Pub Date : 2021-1-22 , DOI: 10.1039/d0ra10208c Yi Xiao 1 , Xiuyun Liu 1 , Yongfa Diao 2
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Developing highly efficient and inexpensive adsorbent is a critical technology for elemental Hg removal from the coal combustion flue gases worldwide. Here, we present a novel approach that a waste by-product of petroleum coke containing organic sulfur enhanced bromine binding during the bromine modification process and the brominated petroleum coke increased its mercury adsorption. Experiments and density functional theory reveal that the mercury adsorption capacity directly correlated with the surface organic sulfur and the binding bromine content. Our direct observations and theoretical modeling demonstrate that HgBr and Hg(Br) Br are the primary chemical forms chemisorbed on the surface of this new carbon-based sorbent, which is approaching to bind on the carbon site next to the S atom. The synergetic effect of the inherent thiophene sulfur and loaded bromine enhanced the Hg removal efficiency of the adsorbent.
中文翻译：
了解噻吩硫对溴化石油焦从烟气中捕获元素汞的影响
开发高效且廉价的吸附剂是从全球燃煤烟气中去除元素汞的关键技术。在这里，我们提出了一种新的方法，即含有机硫的石油焦副产物在溴改性过程中增强了溴的结合，溴化石油焦增加了其汞吸附。实验和密度泛函理论表明，汞吸附量与表面有机硫和结合溴含量直接相关。我们的直接观察和理论模型表明，HgBr 和 Hg(Br) Br 是化学吸附在这种新的碳基吸附剂表面的主要化学形式，该吸附剂即将结合在 S 原子旁边的碳位点上。
更新日期：2021-01-22
中文翻译：
了解噻吩硫对溴化石油焦从烟气中捕获元素汞的影响
开发高效且廉价的吸附剂是从全球燃煤烟气中去除元素汞的关键技术。在这里，我们提出了一种新的方法，即含有机硫的石油焦副产物在溴改性过程中增强了溴的结合，溴化石油焦增加了其汞吸附。实验和密度泛函理论表明，汞吸附量与表面有机硫和结合溴含量直接相关。我们的直接观察和理论模型表明，HgBr 和 Hg(Br) Br 是化学吸附在这种新的碳基吸附剂表面的主要化学形式，该吸附剂即将结合在 S 原子旁边的碳位点上。
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