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Study In Synthesis And Analysis Of New Fluid Catalytic Cracking Catalyst With Characterization And Reaction Properties Of Cracking

Posted on:2010-05-20Degree:DoctorType:Dissertation
Country:ChinaCandidate:Y Q YangFull Text:PDF
GTID:1101360278497219Subject:Analytical Chemistry
Abstract/Summary:PDF Full Text Request
The main contents of this paper describe how to synthesize the new materials of the fluid catalytic cracking (FCC) catalysts.By analyzing the pore structure parameters of the new materials FCC catalyst, the associated study on analysis of the new catalytic cracking catalyst and their pore structure and reaction properties are carried out. As a result, the satisfactory analytical methods of phosphorus, iron, lanthanum and rare earth elements contained in the new materials FCC catalyst were determined by using X-ray fluorescence spectrometry. The objective of this paper is to guide the design of catalytic reaction process and enhance the further research of the new FCC catalyst materials through studying the catalyst shape, size and structure in the view of analytical theories.This paper consists of the following three parts:Part One A review on study progress of new fluid catalytic cracking catalyst in synthesis, analysis, characterization and reaction propertiesChapter One A review on study progress of the new material of fluid catalytic cracking catalystThe fluid catalytic cracking (FCC) reaction and its catalytic cracking catalysts are introduced when the new materials for FCC catalyst and its process are summarized and categorized. Then, the potential development and application prospects of FCC catalysts and new materials with the high cracking activity and low coking properties are predicted.Chapter Two Study progress of the fluid catalytic cracking catalyst in relation between reaction capability and pore structureIn the preparation process of FCC catalyst, there is the existence of pore structure and surface area changes. Therefore, the accurate analysis of high-performance research on changes of pore structure characteristics will become the basis of FCC catalyst synthesis. In this paper, the characterization of pore structure analysis, reaction course of changes in pore structure and pore structure model are summarized on the three aspects of FCC catalyst pore structure analysis method, and the characteristics of various methods are compared too. In meantime, the FCC catalyst analysis methods focusing on the prosperous development are discussed. A particular study on the relations between the change of pore structure and reaction properties in the catalyst preparation process is introduced referring to literatures.Chapter Three A review on the X-ray Fluorescence Spectrometry analysisThis chapter introduces the basic principles and the instrumentation of the X-ray fluorescence spectrometry analysis. It mainly summarizes and categorizes the applications of X-ray Fluorescence Spectrometry, and vistas the newly developing techniques and further trends of the X-ray Fluorescence Spectrometry method to analyze the elements used in the new material catalyst based on the published references.Chapter Four Significance and the main research contents of the thesisSignificance and objectives of this research, main contents, innovative points, experiments and the characterization approaches in this thesis are introduced.Part Two Study on the reaction capability and the pore structure of new material with FCC catalystThe properties of Jinyang soil taken from Shanxi Province and the catalyst from its in-situ crystallization were studied in the laboratory. The result showed that the essential properties of Jinyang soil met with the requirement for making catalyst by in-situ crystallization, which possessed the stronger and appropriate alkaline dissolvable rates for active alumina and active silica respectively, as well as good performance of crystallization and cracking. After the thermal treatment and chemical modification of kaolin, the certain reactive mesoporous structure was formed in CLS material, and the novel FCC catalyst containing CLS exhibited the excellent heavy oil cracking capability and superior selectivity to desired products.Part Three Determination of the new material catalyst by X-ray Fluorescence SpectrometryChapter One Determination of Phosphorus and Iron in Co-catalyst by X-ray Fluorescence SpectrometryThe aim of this work was to develop a new technique for quantitative analysis of phosphorus and iron contents in co-catalyst by X-ray fluorescence spectrometry (XRFS). A set of synthesized standard samples were prepared for the experiments with this purpose when the interferences of inter-elements were corrected by the Empirical Coefficient Method. The standard samples were manually synthesized, and the powder pellets were used for sample preparation while and the matrix effects were corrected by the experience coefficients. The characteristic X-rays of phosphorus and iron elements could selectively be determined with the enhanced accuracy and reduced time consumption within a range without signal interference from main-component elements. Manufacturing sample and measurement conditions of the new method were brought up; The matrix effects of Co-catalyst samples were verified by Empirical Coefficient Method. The results of experiment showed that the accuracy and precision of this method satisfactorily had the high repeatability. The measuring ranges of elements were w 0.01-2.50% for phosphorus and w 0.01-2.50% for Iron with the relative deviations of 0.34% for Phosphorus and 0.59% for Iron, respectively. This method showed the satisfactory accordant results in comparison with the chemical method and inductively coupled plasma (ICP). It also has provided the analytical values for phosphorus and iron in co-catalyst. This new method has the advantages of satisfactory accuracy, high precision, less interference, easy sample handling and high efficiency. In addition, the samples are not decomposed during the analysis process when each sample only requires 5 minutes to be taken for measurement. This new method will be able to meet the growing demands of quantitative analysis of phosphorus and iron content in co-catalysts. This method had the satisfactory accuracy and precision, so the analytical range was large, and had been successfully applied to the determine phosphorus and iron in co-catalyst.Chapter Two Determining the content of La on modified zeolite by X-ray Fluorescence Spectrometry After eliminating particle size effects and mineral effects by sufficiently grinding and using proper preparation methods of standards, absorption-enhancement effects of the XRFS to determine the content of La2O3 on modified zeolite were mainly discussed in this paper. If the absorption-enhancement effects were corrected by the experience coefficients, the results appeared to be in good agreement with the classical chemical method, and can meet the requirements of scientific research analysis and industrial analysis.
Keywords/Search Tags:Fluid catalytic cracking catalyst, New material, Jinyang Soil of Shanxi, in-situ crystallization, Reaction capability, Pore structure, X-ray fluore-scence spectrometry, Phosphorus, Iron, La, Co-catalyst, Zeolite, Determination
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