Synthesis and Characterization of Ceria-zirconia Mixed Oxides Based Catalysts PDF Download
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Author: Carla Eponina Hori
Publisher:
ISBN:
Category :
Languages : en
Pages : 312
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Author: Carla Eponina Hori
Publisher:
ISBN:
Category :
Languages : en
Pages : 312
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Author: Daniel J. Rosenberg
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages :
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Author: Alessandro Trovarelli
Publisher: World Scientific
ISBN: 1848169647
Category : Science
Languages : en
Pages : 909
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Book Description
This book follows the 2002 edition of Catalysis by Ceria and Related Materials, which was the first book entirely devoted to ceria and its catalytic properties. In the ten years since the first edition a massive amount of work has been carried out in the field, and ceria has gained a prominent position in catalysis as one of the most valuable material for several applications. This second edition covers fundamental and applied aspects of the latest advances in ceria-based materials with a special focus on structural, redox and catalytic features. Special emphasis is given to nano-engineered and nano-shaped systems which are a key factor in the predictive and rational design of ceria with novel properties.In addition, the book presents recent advances in emerging and traditional large-scale applications of ceria in catalysis, such as the treatment of emissions from mobile sources (including diesel and gasoline engines). The primary readership includes catalysis and material science researchers from academy and industry and postdoctorate and graduate students in chemistry, chemical engineering and physics.
Author: Eric Prates da Costa
Publisher:
ISBN:
Category :
Languages : de
Pages : 0
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Author: Dr T. E Mohan Kumar
Publisher: Krishna Publication House
ISBN: 9390627389
Category : Antiques & Collectibles
Languages : en
Pages :
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Author: Salvatore Scire
Publisher: Elsevier
ISBN: 0128156627
Category : Technology & Engineering
Languages : en
Pages : 402
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Book Description
Cerium Oxide (CeO2): Synthesis, Properties and Applications provides an updated and comprehensive account of the research in the field of cerium oxide based materials. The book is divided into three main blocks that deal with its properties, synthesis and applications. Special attention is devoted to the growing number of applications of ceria based materials, including their usage in industrial and environmental catalysis and photocatalysis, energy production and storage, sensors, cosmetics, radioprotection, glass technology, pigments, stainless steel and toxicology. A brief historical introduction gives users background, and a final chapter addresses future perspectives and outlooks to stimulate future research. The book is intended for a wide audience, including students, academics and industrial researchers working in materials science, chemistry and physics. Addresses a wide range of applications of ceria-based materials, including catalysis, energy production and storage, sensors, cosmetics and toxicology Provides the fundamentals of ceria-based materials, including synthesis methods, materials properties, toxicology and surface chemistry Includes nanostructured ceria-based materials and a discussion of future prospects and outlooks
Author: Yue Zhang
Publisher:
ISBN: 9781361310243
Category :
Languages : en
Pages :
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Book Description
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
Author: Hadis Amani
Publisher:
ISBN:
Category :
Languages : en
Pages : 548
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Book Description
Author: Emmy Laybourne
Publisher: Feiwel & Friends
ISBN: 1429955244
Category : Young Adult Fiction
Languages : en
Pages : 304
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Book Description
Your mother hollers that you're going to miss the bus. She can see it coming down the street. You don't stop and hug her and tell her you love her. You don't thank her for being a good, kind, patient mother. Of course not—you launch yourself down the stairs and make a run for the corner. Only, if it's the last time you'll ever see your mother, you sort of start to wish you'd stopped and did those things. Maybe even missed the bus. But the bus was barreling down our street, so I ran. Fourteen kids. One superstore. A million things that go wrong. In Emmy Laybourne's action-packed debut novel, six high school kids (some popular, some not), two eighth graders (one a tech genius), and six little kids trapped together in a chain superstore build a refuge for themselves inside. While outside, a series of escalating disasters, beginning with a monster hailstorm and ending with a chemical weapons spill, seems to be tearing the world—as they know it—apart.
Author: Charles N. Satterfield
Publisher: Krieger Publishing Company
ISBN: 9781575240022
Category : Technology & Engineering
Languages : en
Pages : 554
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Book Description
Blending theory and practice, this text provides the information needed to work with solid catalysts in the laboratory, pilot plant or commercial installation. This revised and expanded edition incorporates recent theories and industrial applications.
