Catalytic Combustion Of Volatile Organic Compounds Research Articles

Recent Development of Catalysts for Removal of Volatile Organic Compounds in Flue Gas by Combustion: A Review

Volatile organic compounds (VOCs) emitted from anthropogenic sources pose direct and indirect hazards to both atmospheric environment and human health due to their contribution to the formation of photochemical smog and potential toxicity including carcinogenicity. Therefore, to abate VOCs emission, the catalytic oxidation process has been extensively studied in laboratories and widely applied in various industries. This report is mainly focused on the benzene, toluene, ethylbenzene, and xylene (BTEX) with additional discussion about chlorinated VOCs. This review covers the recent developments in catalytic combustion of VOCs over noble metal catalysts, nonnoble metal catalysts, perovskite catalysts, spinel catalysts, and dual functional adsorbent-catalysts. In addition, the effects of supports, coke formation, and water effects have also been discussed. To develop efficient and cost-effective catalysts for VOCs removal, further research in catalytic oxidation might need to be carried out to strengthen the understanding of catalytic mechanisms involved.

Catalytic Combustion of Volatile Organic Compounds over a Structured Zeolite Membrane Reactor

A novel structured zeolite membrane reactor based on a Cu–Mn (1:6)/ZSM-5/PSSF catalyst was developed for catalytic combustion of volatile organic compounds (VOCs). First, the ZSM-5 membrane/PSSF (paper-like sintered stainless steel fibers) composite was fabricated by the wet layup papermaking/sintering process and secondary growth process. The copper/manganese binary oxides modified ZSM-5 membrane catalyst was synthesized by an incipient wetness impregnation method. Catalytic combustion of VOCs in single and binary components was investigated over these structured zeolite membrane reactors using different gas hourly space velocity (GHSV) (3822–11466 h–1). Results showed that the complete destruction of isopropyl alcohol or ethyl acetate in a single component can be achieved below the temperature of 300 °C. The study exhibited that the presence of toluene in the binary mixture had a slight effect on the conversion of isopropyl alcohol or ethyl acetate. Isopropyl alcohol and ethyl acetate were found to be more reactive than toluene in the binary mixture. A higher temperature above 300 °C was needed to totally destroy toluene in the binary mixture. The structured zeolite membrane reactor exhibited a relatively lower bed pressure drop, excellent reaction stability, reasonable mass/heat transfer efficiency, and excellent contacting efficiency as well as relatively lower diffusion resistance.

Catalytic combustion of VOCs on non-noble metal catalysts

Volatile organic compounds (VOCs) are toxic and contribute significantly to the formation of the photochemical smog, which has remarkable impact to the air quality; therefore, the research on the removal of VOCs has attracted increasing interests during the last decade. This review covers the recent developments in catalytic combustion of VOCs over non-noble metal catalysts including mixed metal oxide catalysts, perovskite catalysts and Au-containing catalysts. The effect of water vapor, coke formation and the effect of supports on the catalytic combustion process will be discussed. The concept of an adsorption/catalytic combustion dual functional system is introduced and several examples of such systems are evaluated. To develop efficient and cost effective VOC removal technologies, further research in catalytic combustion needs to develop novel non-noble metal catalysts and adsorbents, and improve the understanding of catalytic mechanisms involved.

The catalytic combustion of VOCs over copper catalysts supported on cerium-modified and zirconium-pillared montmorillonite

Abstract A series of CuO supported on cerium-modified and zirconium-pillared montmorillonite (CuO/CZM) was synthesized. Here, the temperatures for total oxidation of acetone, ethyl acetate and toluene over CuO/CZM were at 230, 250 and 300 °C. The surface properties of CuO/CZM catalysts were investigated by XRD, BET, TEM, AFM, and TPR techniques. The interlayer space was enlarged and the surface area increased after montmorillonite (MMT) was pillared by zirconium and modified by cerium. The new support seems to play an important role in dispersing CuO. The good catalytic performance and reasonable cost, when comparing with noble metal type catalysts, make CuO/CZM catalysts a promising candidate for industrial processing of volatile organic compounds (VOCs) elimination.

04/02959 Catalytic combustion of volatile organiccompounds: Everaert, K. and Baeyens, J. Journal of Hazardous Materials, 2004, 109,(1–3), 113–139

04/02959 Catalytic combustion of volatile organiccompounds: Everaert, K. and Baeyens, J. Journal of Hazardous Materials, 2004, 109,(1–3), 113–139

ChemInform Abstract: Catalytic Combustion of VOC (Volatile Organic Compounds) Mixtures in a Monolithic Reactor.

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