Research progress on catalytic oxidation technologies of gaseouselemental mercury in flue gases
Journal Title: Energy Environmental Protection - Year 2023, Vol 37, Issue 3
Abstract
Mercury catalytic oxidation technologies in recent studies are summarized in this study to highlight the present research development and future perspective of catalysts. The mercury oxidation catalysts are classified into V-based catalyst, noble metal catalyst and transition metal oxides catalyst. The mercury oxidation efficiency (MOE) of V-based catalyst strongly depends on HCl and Cl_2 concentrations in the flue gas. The noble metal catalyst (e.g., Au, Ag, Pt, Ru and Pd-based) is a promisingmercury oxidation catalyst because of its strong affinity toward mercury atom. The transition metal oxides (Cu, Mn, Fe, Mo, Ag, Pd, Cr, etc.) has also been used to develop low and middle temperature catalysts for Hg^0 oxidation. Most of these catalysts have very high mercury oxidation efficiencies at a certain temperature, but NH_3 and SO_2 in the flue gas seriously suppress the catalyst activity from 94.7%±3.9% and 83.9%±4.8% to 66.8%±16.8% and 57.1%±7.5%, respectively. It is concluded that puremetal oxides serving as single oxidation site would not be suitable mercury oxidation catalysts in the complex flue gas environment. The multicomponent metallic oxide catalysts generate more species oxidation reaction sites for NO reduction and Hg^0, which promotes the possibility of NO and Hg^0 synergic removal. This work also proposes the future challenge of highly efficient Hg0 oxidation catalyst.
Authors and Affiliations
LI Guoliang|School of Energy and Environmental Engineering, University of Science and Technology Beijing, China, YE Kaihang|School of Energy and Environmental Engineering, University of Science and Technology Beijing, China, GENG Mengda|School of Energy and Environmental Engineering, University of Science and Technology Beijing, China, ZHENG Yang|School of Energy and Environmental Engineering, University of Science and Technology Beijing, China, YUE Tao*|School of Energy and Environmental Engineering, University of Science and Technology Beijing, China
Keywords
Related Articles
- EP ID EP737960
- DOI 10.20078/j.eep.20230504
- Views 71
- Downloads 0
Advances in Coking Wastewater Treatment and Zero Discharge Technology
Coking wastewater contains a complex mixture of organic substances that are challenging to decompose, including phenols, polycyclic aromatic hydrocarbons (PAHs), and nitrogen-containing heterocyclic compounds (NHCs). The...
Research progress on total nitrogen removal for aquaculture wastewater
Aquaculture plays a significant role in promoting China′s economic development and ensuring the safety of the food supply. However, in recent years, the rapid development of China′s aquaculture industry has led to the di...
Research progress of biomass activated carbon regeneration technology
Biomass activated carbon regeneration technology is widely used for environmental treatment and resource recovery. Various regeneration methods are available, including thermal, chemical, microwave, electrochemical, biol...
Applications of zeolite-based catalysts in CO_2 utilization
Development of highly efficient CO_2 conversion technologies is key to advancing carbon capture and unitization (CCU), being very important to achieve the China′s carbon neutral climate goals. Zeolites are microporous an...
Study on simultaneous desalination and removal of organic matter from water by electro-Fenton membrane distillation composite process
An electrocatalytic hydrophobic membrane was prepared by vacuum filtration method, and a novel electro-Fenton membrane distillation (EF-MD) composite process was developed based on electrocatalytic hydrophobic membrane c...