Adjustment of the Product Distribution over a Bifunctional Ca12Al14O33-Supported MnOx Catalyst from Cracking Gasification of the Petroleum Residue

Abstract

Cracking gasification of the petroleum residue toward expected gas and light oil products is catalyzed in a fluidized bed reactor using calcium aluminate (C12A7) and Mn-modified C12A7 as the bifunctional catalysts. The performances of the reaction temperature and Mn-modified C12A7 catalysts on the product distribution for the vacuum residue cracking are studied. The results showed that ethylene, propylene, and butylene are the primary products of the petroleum residue cracking over C12A7, reflected in the C2–C4 olefinicity of 63.4% at 650 °C with catalyst/oil of 7.0. For Mn-modified C12A7 catalysts, the C2–C4 olefinicity of the 0.4 wt % Mn/C12A7 catalyst is increased to 66.9%, while that of 1.0 and 2.0 wt % Mn/C12A7 catalysts is decreased to 40.1 and 25.1%, respectively. Besides, the C4–C5 hydrocarbon yield is increased from about 3.0 wt % over C12A7 and 0.4 wt % Mn/C12A7 catalysts to approximately 11.5 wt % over 1.0 and 2.0 wt % Mn/C12A7 catalysts. This indicated a technical feasibility for adjusting the...