Plasma-assisted Catalysis for the Abatement of Isopropyl Alcohol over Metal Oxides

摘要: This work investigated the plasma-catalytic decomposition of isopropyl alcohol (IPA) and behavior byproduct compounds over monolith-supported metal oxide catalysts. Iron (Fe2O3) or copper (CuO) was loaded on a monolithic porous α-Al2O3 support, which placed inside coaxial electrodes plasma reactor. The IPA efficiency itself hardly depended presence type oxides because rate plasma-induced so fast, but formation largely affected by them. concentrations unwanted byproducts, including acetone, formaldehyde, acetaldehyde, methane, carbon monoxide, etc., were in order Fe2O3/α-Al2O3 < CuO/α-Al2O3 from low to high. Under condition (flow rate: 1 L min -1 ; concentration: 5,000 ppm; O2 content: 10%; discharge power: 47 W), selectivity towards CO2 about 40, 80 95% for α-Al2O3, Fe2O3/α-Al2O3, respectively, indicating that is most effective oxidation IPA. Unlike plasma-alone processes tar-like products formed volatile organic are deposited, present plasma-catalyst hybrid system did not exhibit such phenomenon, thus retaining original catalytic activity.