From Microporous to Mesoporous Molecular Sieve Materials and Their Use in Catalysis

From Microporous to Mesoporous Molecular Sieve Materials and Their Use in Catalysis
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DOI:
10.1002/chin.199752317
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发表时间:
1997-12
期刊:
ChemInform
影响因子:
--
通讯作者:
A. Corma
A. Corma
中科院分区:
其他
文献类型:
--
作者:
A. Corma

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可以说沸石是工业上使用最广泛的催化剂。它们是结晶微孔材料,在精细化学品和特种化学品的生产中,特别是在处理动力学直径低于10 μ m的分子时,作为炼油、石油化学和有机合成的催化剂已经非常成功。它们在催化方面取得成功的原因与这些材料的以下特性有关:(1)它们具有非常高的表面积和吸附能力。(2)沸石的吸附性能可以控制,并且它们可以从疏水性材料到亲水性材料变化。(3)可以在骨架中产生活性位点,例如酸位点,并且可以针对特定应用定制它们的强度和浓度。(4)它们的通道和空腔的尺寸在许多感兴趣的分子的典型范围内(5-12 μ m),并且存在于这些微孔中的强电场2与客体分子的电子限制3一起负责反应物的预活化。(5)它们复杂的通道结构允许沸石呈现不同类型的形状选择性,即产物、反应物和过渡态,其可用于将给定的催化反应导向所需产物,避免不希望的副反应。(6)沸石的所有这些性质在催化中是至关重要的,并使它们成为上面列出的工艺类型的有吸引力的选择,最终取决于这些材料的热和水热稳定性。在沸石的情况下,它们可以被激活,以生产非常稳定的材料,不仅耐热和耐蒸汽,而且还耐化学侵蚀。Avelino Corma Canos于1951年出生于西班牙的Moncófar。他在瓦伦西亚大学学习化学(1967 - 1973年)并获得博士学位。1976年在马德里孔普卢顿大学。1990年,他成为瓦伦西亚理工大学的数学技术研究所(UPV-CSIC)主任。他目前的研究领域是沸石作为催化剂,涵盖合成,表征和反应性方面的酸碱和氧化还原催化。A. Corma在国际期刊上发表了大约250篇关于这些主题的文章,三本书,以及一些评论和书籍章节。他是Zeedom,Catalysis Review Science and Engineering,Catalysis Letters,Applied Catalysis,Journal of Molecular Catalysis,Research Trends,CaTTech和Journal of the Chemical Society,Chemical Communications的编委会成员。A. Corma是20项专利的合著者,其中5项是商业应用。他曾获得杜邦新材料奖(1995年)和西班牙国家技术研究奖“列奥纳多托雷斯克韦多”(1996年)。
It is possible to say that zeolites are the most widely used catalysts in industry. They are crystalline microporous materials which have become extremely successful as catalysts for oil refining, petrochemistry, and organic synthesis in the production of fine and speciality chemicals, particularly when dealing with molecules having kinetic diameters below 10 Å. The reason for their success in catalysis is related to the following specific features of these materials: 1 (1) They have very high surface area and adsorption capacity.(2) The adsorption properties of the zeolites can be controlled, and they can be varied from hydrophobic to hydrophilic type materials.(3) Active sites, such as acid sites for instance, can be generated in the framework and their strength and concentration can be tailored for a particular application.(4) The sizes of their channels and cavities are in the range typical for many molecules of interest (5-12 Å), and the strong electric fields2 existing in those micropores together with an electronic confinement of the guest molecules3 are responsible for a preactivation of the reactants.(5) Their intricate channel structure allows the zeolites to present different types of shape selectivity, ie, product, reactant, and transition state, which can be used to direct a given catalytic reaction toward the desired product avoiding undesired side reactions.(6) All of these properties of zeolites, which are of paramount importance in catalysis and make them attractive choices for the types of processes listed above, are ultimately dependent on the thermal and hydrothermal stability of these materials. In the case of zeolites, they can be activated to produce very stable materials not just resistant to heat and steam but also to chemical attacks.Avelino Corma Canos was born in Moncófar, Spain, in 1951. He studied chemistry at the Universidad de Valencia (1967− 1973) and received his Ph. D. at the Universidad Complutense de Madrid in 1976. He became director of the Instituto de Tecnologıa Quımica (UPV-CSIC) at the Universidad Politécnica de Valencia in 1990. His current research field is zeolites as catalysts, covering aspects of synthesis, characterization and reactivity in acid− base and redox catalysis. A. Corma has written about 250 articles on these subjects in international journals, three books, and a number of reviews and book chapters. He is a member of the Editorial Board of Zeolites, Catalysis Review Science and Engineering, Catalysis Letters, Applied Catalysis, Journal of Molecular Catalysis, Research Trends, CaTTech, and Journal of the Chemical Society, Chemical Communications. A. Corma is coauthor of 20 patents, five of them being for commercial applications. He has been awarded with the Dupont Award on new materials (1995), and the Spanish National Award “Leonardo Torres Quevedo” on Technology Research (1996).