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Synthesis Characterization And Light N Alkane Isomerization Activity Of Mesoporous Sulfated Zirconia Catalysts
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Book Synopsis Synthesis, Characterization, and Light N-alkane Isomerization Activity of Mesoporous Sulfated Zirconia Catalysts by : Michael A. Risch
Download or read book Synthesis, Characterization, and Light N-alkane Isomerization Activity of Mesoporous Sulfated Zirconia Catalysts written by Michael A. Risch and published by . This book was released on 1999 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Mesoporous Sulfated Zirconia and Its Use as a Solid Acid Catalyst by :
Download or read book Synthesis and Characterization of Mesoporous Sulfated Zirconia and Its Use as a Solid Acid Catalyst written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Synthesis, Characterization and Catalytic Activity of Sulfated Zirconia by : Genevieve P. D. Serrette
Download or read book The Synthesis, Characterization and Catalytic Activity of Sulfated Zirconia written by Genevieve P. D. Serrette and published by . This book was released on 1998 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Characterization and Reactions of Zirconia-Based Solid Acids by : Meghshyam Keshvarao Patil
Download or read book Synthesis, Characterization and Reactions of Zirconia-Based Solid Acids written by Meghshyam Keshvarao Patil and published by LAP Lambert Academic Publishing. This book was released on 2012-04 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid acids and superacids are the topics of everlasting interest due to numerous applications in many areas of the chemical industry. The present understanding of acid induced or catalyzed reactions cover an extremely broad field, ranging from large-scale industrial processes in hydrocarbon chemistry to enzyme-controlled reactions in the living cell. Among solid acid catalysts, the sulfated zirconia (SZ) has been received lot of interest which was first prepared and explored as a hydrocarbon isomerization catalyst in 1962. This book which is based on a comprehensive research study gives a detail information regarding synthesis of zirconia based solid acid catalysts, their characterization and applications particularly in organic synthesis and transformation reactions; and Cu(I)-Zeolite as a green catalyst for synthesis of propargylamines. This book is essential for researcher working in the field of catalysis.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2003 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Zirconia Based Solid Acid Catalysts for Biodiesel Production by : Yue Zhang
Download or read book Synthesis and Characterization of Zirconia Based Solid Acid Catalysts for Biodiesel Production written by Yue Zhang and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Synthesis and Characterization of Zirconia Based Solid Acid Catalysts for Biodiesel Production" by Yue, Zhang, 张悦, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Biodiesel is a promising renewable alternative fuel to fossil energy. For the biodiesel production from low-cost feedstock, a pretreatment step is essential, which is the esterification of free fatty acids (e.g. oleic acid) in the feedstock in order to avoid soap formation and minimize catalyst deactivation. Sulfuric acid modified zirconia (H2SO4-ZrO2) is known as an effective heterogeneous catalyst for esterification. However, due to rapid 〖SO〗_4 DEGREES(2-) leaching, its reusability is low and its practical use is thus largely hindered. Zirconia supported on silica (ZrO2-SiO2) serves as a kind of non-sulfated zirconia catalyst against the leaching of the active species. Moreover, the silica support offers a large surface area and excellent thermal stability, which can accommodate a number of active zirconia species. Furthermore, there are Zr-O-Si bondings at the contact area between ZrO2 and SiO2, which might result in the formation of a new strong acid species and induce an increase of the zirconia acidity accordingly. Herein, two types of ZrO2-SiO2 catalysts were prepared, by using the reverse microemulsion method and sol-gel-hydrothermal method, denoted as ZrO2-SiO2-ME and ZrO2-SiO2-SG, respectively. The as synthesized ZrO2-SiO2 were characterized by TEM, SEM, EDX, XRD, BET and IR. ZrO2-SiO2-ME demonstrated a good dispersion of ZrO2 nanoparticles, encapsulating in the monodispersed SiO2 host matrix, while ZrO2-SiO2-SG possessed the SiO2 support with a mesoporous structure, with an average pore size of 7 nm and a surface area of 418 m2/g. The catalysts both exhibited excellent catalytic activity and stable performance in the esterification of oleic acid. Besides non-sulfated zirconia, sulfated zirconia catalysts other than traditional H2SO4-ZrO2 were also developed as solid acid catalysts for biodiesel production. Two sulfur-containing strong acids, chlorosulfonic acid (HClSO3) and (NH4)2SO4, were employed to acidify ZrO2, and two sulfated zirconia catalysts were prepared accordingly, namely HClSO3-ZrO2 and S-ZrO2. They were characterized by SEM, EDX, XRD, BET, IR, TGA and NH3-TPD. Comparing with H2SO4-ZrO2, HClSO3-ZrO2 and S-ZrO2 contained higher sulfur content and more acid sites. More importantly, both HClSO3-ZrO2 and S-ZrO2 demonstrated high catalytic activity and excellent durability in the esterification of oleic acid. It is known that consecutive esterification and transesterification reactions are suitable for direct biodiesel production and acetylation of glycerol enables the conversion of this biodiesel byproduct to a biofuel additive. Therefore, all the above mentioned catalysts were examined to compare their catalytic abilities in these reactions. Among the four catalysts, HClSO3-ZrO2 exhibited the highest catalytic activity in both reactions under optimal conditions. The thesis work here described the preparation and characterization of four types of ZrO2-based solid acid catalysts. Their catalytic activities were thoroughly investigated upon the several essential steps in biodiesel production. In addition, the synthesis condition-activity relation was studied and the synthesis and reaction conditions were delicately tuned. DOI: 10.5353/th_b4985882 Subjects: Catalysts - Synthesis Zirconium oxide Biodiesel fuels
Book Synopsis Characterization and Reactivity of Transition Metal Modified Sulfated Zirconia Catalysts for Low Temperature N-butane Isomerization by : Jose E. Tabora
Download or read book Characterization and Reactivity of Transition Metal Modified Sulfated Zirconia Catalysts for Low Temperature N-butane Isomerization written by Jose E. Tabora and published by . This book was released on 1996 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Characterization and Hydrogen-molybdenum Oxide Zirconia Catalyst Interaction for N-heptane Isomerization by : Nurun Najwa Ruslan
Download or read book Synthesis, Characterization and Hydrogen-molybdenum Oxide Zirconia Catalyst Interaction for N-heptane Isomerization written by Nurun Najwa Ruslan and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Characterization and Hydrogen-molybdenum Oxide Zirconia Catalyst Interaction for N-heptane Isomerization by : Nurun Najwa Ruslan
Download or read book Synthesis, Characterization and Hydrogen-molybdenum Oxide Zirconia Catalyst Interaction for N-heptane Isomerization written by Nurun Najwa Ruslan and published by . This book was released on 2012 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Microporous and Mesoporous Solid Catalysts by : Eric G. Derouane
Download or read book Microporous and Mesoporous Solid Catalysts written by Eric G. Derouane and published by John Wiley & Sons. This book was released on 2006-08-14 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This series offers practical help for advanced undergraduate, graduate and postgraduate students, as well as experienced chemists in industry and academia working with catalysts in organic and organometallic synthesis. It features tested and validated procedures, authoritative reviews on classes of catalysts, and assessments of all types of catalysts. Micro- and Mesoporous Solid Catalysts describes the use of zeolites and mesoporous solids as catalysts for the production of fine and specialty chemicals. Specific tips and hints are provided and some typical procedures are described in detail In addition to discussing the pros and cons, several major organic transformations are examined including aromatic substitutions, heterocyclic ring formation, amines synthesis, oligomerisation, oxidation and hydroxylation, and other regioselective and stereoselective reactions Features tutorial introductory chapters, including tips and hints for achieving successful organic transformations Important reactions are featured together with recommendations to resolve potential problems.
Book Synopsis Preparation of Catalysts VII by : R. Maggi
Download or read book Preparation of Catalysts VII written by R. Maggi and published by Elsevier. This book was released on 1998-08-17 with total page 1007 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of the VIIth International Symposium on the Scientific Bases for the Preparation of Heterogeneous Catalysts, are in line with the general scope of this series of events. Emphasis in all Symposia has been on the scientific aspects of the preparation of new and industrial catalysts, or on new methods of preparation, rather than on the catalytic reactions in which such solids are ultimately used. In the present context, the catalytic event itself has only been considered as another, though often decisive, method of catalyst characterization.
Book Synopsis Crystalline Mesoporous Zirconia Catalysts Having Stable Tetragonal Pore Wall Structure by :
Download or read book Crystalline Mesoporous Zirconia Catalysts Having Stable Tetragonal Pore Wall Structure written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Methods for the preparation of new sulfated mesoporous zirconia materials/catalysts with crystalline pore walls of predominantly tetragonal crystal structure, characterized by nitrogen physisorption measurement, X-ray diffraction, transmission electron microscopy and catalytic tests using n-butane isomerization to iso-butane and alkylation of 1-naphthol with 4-tert-butylstyrene as probe reactions. Sulfate deposition is preferred for the transformation of a mesoporous precursor with amorphous pore walls into a material with crystalline pore walls maintaining the mesoporous characteristics.
Book Synopsis Sulfated Zirconia Alkane Isomerization Catalysts by :
Download or read book Sulfated Zirconia Alkane Isomerization Catalysts written by and published by . This book was released on 2004 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preparation and Characterization of Sulfated Zirconia Catalysts by :
Download or read book Preparation and Characterization of Sulfated Zirconia Catalysts written by and published by . This book was released on 2011 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Supramolecular Templating of Mesoporous Zirconia-based Nanocomposite Catalysts by : Michael Sha-Nang Wong
Download or read book Supramolecular Templating of Mesoporous Zirconia-based Nanocomposite Catalysts written by Michael Sha-Nang Wong and published by . This book was released on 2000 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Modification, Characterization and Catalytic Studies of Zeolite Based Bifunctional Catalysts for Hydroisomerization Reactions by :
Download or read book Synthesis, Modification, Characterization and Catalytic Studies of Zeolite Based Bifunctional Catalysts for Hydroisomerization Reactions written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Zeolite ZSM-12 was identified as a promising candidate for hydroisomerization of n-alkanes and a large part of the work was focused on the preparation of ZSM-12 and studying its catalytic performance. Reliable and efficient methods for synthesis of ZSM-12 with high levels of acidity were not available in the literature. Through systematic studies, the synthesis was greatly simplified and ZSM-12 was successfully crystallized at a relatively low Si/Al ratio of 30 using tetraethylammonium cations as the template. In the hydroisomerization of n-heptane as well as mixtures of n-alkanes, ZSM-12 catalysts provided a significantly higher selectivity to both monobranched and dibranched isomers, compared to other large pore zeolites. Kinetic studies carried out using individual octane isomers showed that the formation of certain dibranched and tribranched isomers was mildly hindered by the shape selective effect of the ZSM-12 pore, which resulted in the higher isomer yield. It was found that the cracking activity of ZSM-12 could be increased by three to four times by carrying out the calcination to remove the template at temperatures higher than what is normally used. The variation of the cracking activity with respect to the calcination temperature was very unusual, only the samples calcined in two separate narrow temperature ranges showed substantially enhanced activity. Extensive FTIR characterizations, with pyridine adsorbed on the acidic zeolite, indicated that the enhancement in the cracking activity was due to a synergistic interaction between the framework Brn̲sted acid sites and a Lewis acidic extra framework aluminum (possibly cationic) species present in the zeolite. Hydroisomerization of n-heptane was studied over large pore zeolites with different acidity properties and wide range of Si/Al ratios. The performance of zeolite catalysts with enhanced activity were very sensitive to the platinum precursor used and the pretreatment conditions. The results suggested that zeolite acidity characteristics do not affect the isomer yield, provided the catalyst is carefully prepared to ensure good metal/acidity balance. Therefore, it appears that the only way to obtain isomer yields higher than that of Y zeolite is by employing shape selective zeolites.
Book Synopsis Synthesis, Characterisation and Catalysis of Mesoporous ZSM-5 Catalysts by : Yi-Hsin Chou
Download or read book Synthesis, Characterisation and Catalysis of Mesoporous ZSM-5 Catalysts written by Yi-Hsin Chou and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
