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Study on Sulfur Reduction Additives for FCC Process

Author: YuXiaoYan
Tutor: LiChunYi
School: China University of Petroleum
Course: Chemical processes
Keywords: Catalytic cracking Gasoline Desulfurization Additives Made of porous material
CLC: TE624.1
Type: Master's thesis
Year: 2008
Downloads: 211
Quote: 1
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Abstract


\In 2008 gasoline sulfur content standards reduced to 150μg / g, and standards for gasoline in some countries in Europe and the United States has been reduced to 10 μg / g . However, on the other hand , with the development of China's oil refining industry , domestic crude oil increasingly difficult to meet the needs of the oil refining industry , processing of imported high-sulfur raw materials has become a development trend . In China, about 80% of the gasoline from the catalytic cracking process , of which 90% of the sulfur accounts for about the commodity gasoline sulfur content . FCC gasoline desulfurization technology research and development , to reduce the sulfur content in gasoline has become a top priority . The desulfurization effect USY/ZnO/Al2O3 system , and does not reduce the rate of conversion of heavy oil , but easy and under hydrothermal conditions ZnO Al reaction system , resulting in adsorption desulfurization activity centers and cracking desulfurization center inactivation . In this paper, on the basis of the original additive to homemade pure silicon porous material as a carrier be isolated so that it is loaded into the pores of ZnO and Al both adsorption the ZnO and cracking of the active center of the sulphide sulfur activity center USY are protected not mutually reactive , and can be maintained to aid the performance of the selective removal of sulfides . Evaluation of the additives introduced of homemade pure silicon porous materials in the microreactor and fixed fluidized bed device , and additive structure using X-ray diffraction instrument (XRD) scan . Experimental results show that , the the homemade pure silicon porous material of ZnO and USY play the role of an effective barrier ; Lanzhou VGO as feedstock , a refinery catalyst is balanced by the agent ( micro- activity of 59) , the introduction of the home - made ??porous material aids added amount was 25% , the desulfurization rate can reach 30% or more , and the gasoline selectivity , hydrocarbon composition , and no significant change in gasoline octane number . Examine the desulfurization performance of the active ingredient A , A higher L sour , Al2O3/USY/A / a homemade porous material system desulfurizing effect are better.

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CLC: > Industrial Technology > Oil and gas industry > Oil, natural gas processing industry > Petroleum refining > The refining process > Crude oil pretreatment
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