The Catalytic Incineration of Styrene over an Mn₂O₃/Fe₂O₃ Catalyst

Abstract

In this study, styrene monomer (SM) was treated by a commercial catalyst, Mn 2 O 3 /Fe 2 O 3 , in a fixed-bed reactor. The study can be classified into two major parts. First, the effects of operating factors, such as temperature, SM concentration, space velocity, and O 2 concentration, on the performance of the catalyst were investigated. Second, two catalyst life tests were carried out to characterize the deactivation effect of SM.The results show that the catalyst results in higher conversion of SM at a higher inlet temperature and higher O 2 concentrations. The conversion of SM decreases with increasing SM concentration and space velocity. From the statistical analysis of the data, we find that temperature is the most important factor on the catalytic incineration. Oxygen concentration, SM concentration, and space velocity are significant parameters as well. This paper also provides information on the deactivation effect of SM. The catalysts were characterized by surface and pore-size analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM), and electron spectroscopy for chemical analysis (ESCA) before and after the tests. The results show that the catalytic deactivation may be caused by carbon coating, and the pore size and surface area of the catalyst are smaller after deactivation.

The destruction of dichloroethane over a γ-alumina supported manganese oxide catalyst

“…This is inconsistent with the results of Lou and Lee [34], which showed that the effect of the O 2 content (%) on the reaction rate was insignificant in the process of catalytic incineration of CHCl 3 . A detailed review of the work in the literature on the effect of O 2 concentration for the catalytic decomposition has been presented by Chu et al [35], Tseng and Chu [36], and Tseng et al [22]. They indicated that the O 2 concentration had a positive effect on the conversion of ethyl mercaptan and methyl isobutyl ketone, respectively.…”

Decomposition of Chlorinated Volatile Organic Compound by Metal Catalytic Incineration

“…Although very active, the application of catalyst is using to low operating temperatures because of volatile formation and toxic chromium oxy-chloride. [1].This study we also notice that function of the oxy-dechlorination of 1, 2-dichloroethane with excessive oxygen was carried out during laboratory scale tubular reactor with packed Pt and Fe 2 O 3 catalyst. Spivey [3] indicated that those major parameters affecting catalytic incineration of VOCs included catalyst type, VOC speciation, VOCs concentration, operating temperature, space velocity and O 2 concentration.…”

“…Treatment of environmental pollution caused by Cl-VOC (e.g. dichloromethane, 1,2-dichloroethane) emissions has become an important topic recently [1]. Methods usually used to abate VOCs include incineration with or without catalyst, adsorption, absorption, and condensation.…”

“…Although very active, the application of catalyst is using to low operating temperatures because of volatile formation and toxic chromium oxy-chloride. [1].…”

Adsorption Behavior of Toluene on Modified 1X Molecular Sieves

“…Volatile organic compounds (VOCs) are organic compounds such as aliphatic hydrocarbons, aromatic hydrocarbons, esters, ethers, and halohydrocarbons that have a high vapor pressure under normal room-temperature conditions (Harper, 2000;Li et al, 2009;Tseng et al, 2001). Sources of VOC emissions include fuel combustion, transport, industrial processes, solvent use, and storage and distribution of fuels (Chang et al, 2002;Li, 1996).…”