Các nghiên cứu về các chất xúc tác / phụ gia cho xăng Desulfurization qua Cracking xúc tác Đối với một phản ứng xúc tác bởi một chất xúc tác rắn, ít nhất là một chất phản ứng phải hấp thụ và phản ứng xảy ra trên các trang web hoạt động trên bề mặt bởi một cơ chế Langmuir-Hinshelwood hoặc Rideal-Eley. Rõ ràng, những đứt gãy của các trái phiếu của các chất phản ứng và hình thành các trái phiếu của các sản phẩm mang mối quan hệ gần gũi với các thuộc tính bề mặt của chất xúc. | 5 Studies on Catalysts Additives for Gasoline Desulfurization via Catalytic Cracking C. Y. LI H. H. SHAN Q. M. YUAN C. H. YANG J. S. ZHENG B. Y. ZHAO and J. F. ZHANG University of Petroleum Dongying Shandong Province People s Republic of China I. INTRODUCTION For a reaction catalyzed by a solid catalyst at least one reactant must adsorb and the reaction happens on the active sites on the surface by either a Langmuir-Hinshelwood or Rideal-Eley mechanism. Obviously the rupture of the bonds of the reactants and the formation of the bonds of the products bear close relationship to the surface properties of the catalyst. If there are no interactions between the reactants and the catalyst surface then the catalytic reaction will not occur. The development of new catalysts used to be for improving production efficiency reducing production cost or producing new products. With civilization and the advancement of humankind however the aims for developing catalysts have changed gradually and more and more catalysts have been used to eliminate harmful materials. The treatment of polluted water and waste gases needs catalysts the automotive emissions converter is a typical example. In refineries producing low-sulfur low-olefin and high-octane-number environmentally benign gasoline also requires catalysts. Sulfur in gasoline is not only a direct contributor to SOX emissions it is also a poison affecting the low-temperature activity of automobile catalytic converters. Therefore it influences volatile organic compounds NOX and total toxic emissions 1 . Consequently developed countries limit the content of sulfur in gasoline stringently. In the United States sulfur content will be lower than 30 Mg g in 2005. In China it will be reduced to 300 Mg g from the present 800 Mg g. About 90 of sulfur in gasoline originates from FCC gasoline so reducing the sulfur content of FCC gasoline is the main target of sulfur removal. Several Copyright n 2003 by Marcel Dekker Inc. All Rights .
