Issue 8, 2021, Issue in Progress

Understanding the effect of thiophene sulfur on brominated petroleum coke for elemental mercury capture from flue gases

Abstract

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.

Graphical abstract: Understanding the effect of thiophene sulfur on brominated petroleum coke for elemental mercury capture from flue gases

Article information

Article type
Paper
Submitted
03 Dec 2020
Accepted
03 Jan 2021
First published
22 Jan 2021
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2021,11, 4515-4522

Understanding the effect of thiophene sulfur on brominated petroleum coke for elemental mercury capture from flue gases

Y. Xiao, X. Liu and Y. Diao, RSC Adv., 2021, 11, 4515 DOI: 10.1039/D0RA10208C

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