Conversion of chlorinated hydrocarbon over mesoporous catalysts

I&EC 54

Young-Kwon Park, catalica@uos.ac.kr, Department of Environmental Engineering, University of Seoul, 90, Jeonnog-dong, Dongdaemun-gu, Seoul, 130-743, South Korea, Kyung Seun Yoo, yooks@kw.ac.kr, Department of Environmental Engineering, Kwangwoon University, 447-1, Wolgye-Dong, Nowon-Gu, Seoul, 139-701, South Korea, Seung-Soo Kim, sskim@kipeq.or.kr, Research Center, Korea Institute of Petroleum Quality, 653-1, Yangcheong-ri, Ochang-eup, Cheongwon-gun, Chungcheongbuk-do, 363-883, South Korea, and Jong-Ki Jeon, jkjeon@kongju.ac.kr, Department of Chemical Engineering, Kongju National University, Gongju, 314-701.
Dioxins, known as persistent organic pollutants (POP), are mainly by-products of industrial processes. In terms of dioxin release into the environment, solid waste incinerators are the worst culprits due to incomplete combustion. Well known examples are the highly toxic polychlorinated dioxins (PCDDs) and dibenzofuranes (PCDFs) formed in municipal incinerators. Significant efforts have been made in order to reduce POP emissions (especially of chlorinated compounds) at the international level, which were translated in a series of protocols signed within the framework of several international conventions. Such materials have been considered to be human carcinogens for decades. Previous works were conducted to decompose chlorinated compounds by various methods, such as catalytic oxidation, catalytic hydro-dechlorination, UV irradiation, ozonation, pyrolysis, and electron beam treatment. Among them, catalytic oxidation is one of the most promising technologies for the removal of organic compounds from waste gas. Metal oxides or supported noble metals (platinum and palladium) are the most investigated catalysts for the destruction of organic pollutants. Performances of Pt/Al2O3 catralysts for chlorobenzene oxidation have been widely investigated. Also, zeolites have been considered as effective alternative catalyst to noble metal and metal oxide catalysts used in most commercial applications for air pollution control. However mesoporous materials has not been investigated for 1,2-dichlorobenze decomposition. In this study, the catalytic activities of Pt/mesoporous catalysts such as Pt/Al-MCM-41, Pt/Al-MCM-48, Pt/Al-SBA-15 were compared with Pt/ƒ×-Al2O3. The catalytic activity of Pt/Al-MCM-41 is higher than that of Pt/ƒ×-Al2O3. As Si/Al ratio increases, the catalytic activity increased. This implies that acidity is very important factor for oxidation of 1,2-dichlorobenze. Catalytic activities of Pt/Al-MCM-48, Pt/Al-SBA-15 are also presented. This work was supported by the grant number (R01-2006-000-10786-0) from the basic research program of the Korea Science and Engineering Foundation.
 

IEC Poster Session
8:00 PM-10:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Industrial & Engineering Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007