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Catalytic Cracking of Waste Lubricant Oil over Solid Acid Catalysts  

Hwang, In Hye (Department of Environmental Engineering Kongju National University)
Yang, Hyeon Sun (Department of Environmental Engineering Kongju National University)
Lee, Jong-Jib (Division of Chemical Engineering, Kongju National University)
Choi, Ko-Yeol (Department of Chemical Engineering, Seoul National University of Science and Technology)
Lee, Chang-Yong (Department of Environmental Engineering Kongju National University)
Publication Information
Applied Chemistry for Engineering / v.23, no.3, 2012 , pp. 320-325 More about this Journal
Abstract
The catalytic cracking of waste lubricant oil was carried out on silica-alumina (SA), hydrogen-type mordenite (HM), and dealuminated mordenite (DM) with the silica/alumina ratio of 10.5, 10, and 12.5, respectively. Activity in the catalytic cracking was found to be in the order of SA > DM > HM. Carbon number distribution of the oil obtained over SA was similar to that of gasoline while that of the oil obtained over DM was similar to that of diesel. Carbon number distribution of the oil obtained over HM was similar to that between gasoline and diesel. Acid amounts of three kinds of catalysts were found to be in the order of $SA\;{\approx}\;HM$ > DM. Unlike HM and DM with pores of an uniform diameter below 10 A, SA had a pore size distribution within the range of 10 to 50 A. These results indicate that the acid amount and pore size of the catalysts may be related to the carbon number distribution of the cracked oil. The decrement of surface area by the accumulation of carbon and impurities on the surface of the catalyst was found to be in the order of SA > DM > HM.
Keywords
catalytic cracking; waste lubricant oil; silica-alumina; H-type modernite; dealuminated modernite;
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