A review on recent advances in catalytic combustion of chlorinated volatile organic compounds

Abstract

Chlorinated volatile organic compounds (CVOCs) with strong stability, poor reactivity and high toxicity in waste gases are emitted into the atmosphere from many industrial operations, which has caused sustained harm to both human health and atmospheric environment. Catalytic combustion is regarded as one of the most effective methods to eliminate CVOCs due to its high removal efficiency, low energy consumption and low production of secondary pollutants. However, the screening of efficient catalysts (i.e. low cost, high activity and durability) still remains challenging. In this review, recent developments on catalytic combustion of CVOCs, including catalysts, reaction condition, catalytic reaction mechanism, deactivation reasons and regeneration methods are summarized. It is emphasized that the active components, structures and supports of catalysts have significant effects on their activity, selectivity, stability and longevity. In addition, it is pointed out that catalyst deactivation is closely related to chlorine poisoning, sintering, carbon deposition and metal active phase leaching. Compared with other catalysts, perovskite‐type composite oxides and spinel‐type composite oxides have shown to be promising materials in the catalytic combustion of CVOCs due to their particular structure and nature (e.g. surface area, redox property and surface acidity). Thereafter, the outlooks on catalytic combustion of CVOCs are also presented in this article based on the studies in the literature, which offer influential information for further research on the treatment technology of CVOCs. © 2020 Society of Chemical Industry

Zeolite-Based Materials for the Catalytic Oxidation of VOCs: A Mini Review

“…Along with the refinement studies, the control of chlorinated volatile organic compounds (CVOCs) has received a lot of attention from scholars due to their high stability, poor reactivity and high toxicity ( Li et al, 2020 ). CB (C 6 H 5 Cl), DCE (CH 2 ClCH 2 Cl), DCM (CH 2 Cl 2 ), and TCE (C 2 HCl 3 ) are the typical CVOCs discharged by industrial sources.…”

The Study on the Active Site Regulated RuOx/Sn0.2Ti0.8O2 Catalysts with Different Ru Precursors for the Catalytic Oxidation of Dichloromethane

“…Therefore, many CVOCs have been listed as priority pollutants by the United States, China and many other countries [5][6][7][8]. The catalytic combustion method is considered to be an advanced technology that can effectively eliminate CVOCs due to its advantages of low ignition temperature, low energy consumption, high removal efficiency, and small secondary pollution [9,10]. Because the existing catalysts generally face problems such as low catalytic activity and poor chlorine poisoning resistance, the development of efficient and stable catalysts is at the core of catalytic combustion process research [11].…”

“…The important reason of chlorine poisoning deactivation of the catalyst is that the Cl species adsorbed on the surface of the catalyst is difficult to remove in a sufficient time-frame, thus blocking the active sites of the catalyst [9,12]. Ru-based catalysts are widely used in heterogeneous catalysis, including the decomposition of various organic compounds [13,14] and the oxidation of carbon monoxide [15,16], due to their excellent redox performance.…”

Oxidation of Dichloromethane over Au, Pt, and Pt-Au Containing Catalysts Supported on γ-Al2O3 and CeO2-Al2O3

“…Among the end-off pipe technologies, catalytic oxidation is a cost-effective and environmentally friendly destructive method for the abatement of VOCs [ 2 , 8 , 9 ]. In CVOC oxidation, selectivity of the catalyst is of great importance to ensure the production of HCl while restraining the formation of byproducts and, also, minimizing the deactivation of the catalyst.…”

“…In addition, the Al 2 O 3 -CeO 2 -supported catalysts showed good activity in DCM oxidation and enhanced selectivity towards CO 2 , but the HCl yields remained below 90% at the temperature range used in the experiments. [ 12 ] In general, platinum group metals have proven to be highly active and durable catalysts for the oxidation of CVOCs [ 2 , 9 , 21 ].…”