Graphitic Carbon Nitride for Gaseous Mercury Emission Control: A Review

被引：26

作者：

Liu, Dongjing ^{[1
]}

Yang, Lingtao ^{[2
]}

Ling, Yang ^{[3
]}

Wu, Jiang ^{[2
]}

Li, Bin ^{[1
]}

Li, Chaoen ^{[4
]}

机构：

[1] Jiangsu Univ, Sch Energy & Power Engn, Zhenjiang 212013, Jiangsu, Peoples R China

[2] Shanghai Univ Elect Power, Coll Energy & Mech Engn, Shanghai 200090, Peoples R China

[3] Univ Shanghai Sci & Technol, Sch Energy & Power Engn, Shanghai 200093, Peoples R China

[4] Ningbo Univ Technol, Sch Civil & Transportat Engn, Ningbo 315016, Zhejiang, Peoples R China

来源：

ENERGY & FUELS | 2022年 / 36卷 / 08期

基金：

中国国家自然科学基金;

关键词：

GAS-PHASE HG-0; ELEMENTAL MERCURY; FLUE-GAS; PHOTOCATALYTIC OXIDATION; ACTIVATED CARBONS; REMOVAL; COAL; ADSORPTION; PERFORMANCE; COMPOSITES;

D O I：

10.1021/acs.energyfuels.2c00578

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

: Mercury emissions from combustion of coal, biomass, and solid waste threaten human life and the environment. As the principal mercury species in flue gas, elemental mercury (Hg0 ) can easily escape from available air pollution control instruments because of its chemical inertness, high volatility, and aqueous insolubility. Recently, graphitic carbon nitride (g-C3N4) seems to be an intriguing candidate for Hg0 emission control. This review highlights the latest advances in adsorptive and photocatalytic removal of Hg0 by g-C3N4-based composites. Metal oxide (MeOx)- and halide-modified g-C3N4 can effectively capture Hg0 from simulated flue gas. Nonetheless, acidic flue gas components can degrade the performances of MeOx/g-C3N4 adsorbents, while halide-modified g-C3N4 suffers from release of halogen and potential leaching risk of mercury. Metal sulfide (MeSx)-modified g-C3N4 appears to be the best candidate for Hg0 capture owing to its superior tolerance to sulfur dioxide, fast adsorption rate, and high mercury capacity. Combining bismuth oxyhalides (BiOX) with g-C3N4 can promote photocatalytic oxidation of elemental mercury under visible light irradiation; nonetheless, the Hg0 removal efficiency is still unsatisfactory, and the underlying photocatalysis mechanism is not yet clear.

引用

页码：4297 / 4313

页数：17

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