Industrial Chlorinated Organic Removal with Elimination of Secondary Pollution: A Perspective

Abstract

Chlorinated volatile organic compounds (CVOCs) emitted from the industrial fabrication process and coatings, pharmacy, and incineration are toxic to the environment and humans. Catalytic combustion can convert CVOCs into CO 2 , H 2 O, and HCl/Cl 2 at lower temperatures; as such, it is regarded as a promising method at present. However, it still causes serious secondary pollutants because of the involved toxic polychlorinated byproducts that are discharged in the tail gas or deposited on the catalyst surface or reaction device. This is because the individual combustion process cannot completely remove the dissociated chlorine to form HCl; therefore, it can react again with the catalyst or byproducts, resulting in the deactivation of the catalyst and the formation and accumulation of polychlorinated byproducts, including dioxin. The industrial catalytic hydro-dechlorination (HDC) process is more concerned with formation of HCl and acquisition of desired products, which is expected to achieve a possible result of complete elimination of industrial CVOC gas without secondary byproduct pollution via combination of the combustion process and HDC process. Herein, we highlight the reaction characteristics of combustion and HDC methods against CVOCs and provide a perspective on the need for accomplishing the elimination and recycling of industrial CVOCs in the design of possible combined processing methods.

Sulfur-Modified Nickel-Based Hybrid Nanosheet as a Robust Bifunctional Electrode for Hydrogen Generation via Formaldehyde Reforming

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Degradation of Sodium Acetate by Catalytic Ozonation Coupled with a Mn-Functionalized Fly Ash: Reaction Parameters and Mechanism

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Perspective, Review, and Featured Articles of 2023

“…For Part C the focus is on chemical transformations at solid surfaces. The removal of chlorinated organics from industrial pollution faces many challenges; however, incorporating liquid water in the reaction chamber helps prevent deactivation of the catalyst and the inadvertent creation of dioxins, as illustrated by Dong et al Cargnello and co-workers gave their perspective on how understanding the morphological changes that occur in active sites of heterogeneous catalysts can allow for their rational design and contribute to a complete description of catalyst behavior . Fung et al gave an extensive overview of the organic reactions catalyzed on metal oxide surfaces .…”