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Morphological Effects on Catalytic Performance of LTL Zeolites in Acylation of 2-Methylfuran Enhanced by Non-Microwave Instant Heating
Materials Chemistry and Physics ( IF 4.6 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.matchemphys.2020.122688
Nur Hidayahni Ahmad , T. Jean Daou , Pedro Maireles-Torres , Moussa Zaarour , Svetlana Mintova , Tau-Chuan Ling , Eng-Poh Ng

Abstract Morphological characteristics of zeolites can have significant effects on the catalytic reactions. However, the roles of zeolite morphology on catalytic reactions, particularly Friedel-Crafts acylation of 2-methylfuran, are still not clear. Hence, LTL-type zeolites with different morphologies are prepared by using bamboo leaf bio-silica source where the zeolites are used to elucidate the morphological properties in this acylation reaction. The results show that LTL zeolites with short-rod, cylindrical, stick-like and nanosized shapes can be prepared by simply tuning the water content of the precursor hydrogels and the crystallization time. The morphological properties of LTL zeolites are also found to have pronounced influences on their surface properties (surface areas, pore volumes, number of micropore channels, textural properties) and acidity (amount, strength and type) where these properties affect their catalytic activity in acylation of 2-methylfuran under non-microwave instant heating condition. Furthermore, the influence of temperature and heating time on the kinetics of catalytic acylation of 2-methylfuran, and the catalytic comparative study between nanosized LTL zeolite and several homogeneous and heterogeneous catalysts are also discussed.

中文翻译:

非微波瞬时加热增强LTL沸石对2-甲基呋喃酰化反应催化性能的形态学影响

摘要 沸石的形貌特征对催化反应具有重要影响。然而,沸石形态在催化反应中的作用,特别是 2-甲基呋喃的 Friedel-Crafts 酰化,仍不清楚。因此,通过使用竹叶生物二氧化硅源制备了具有不同形态的 LTL 型沸石,其中沸石用于阐明该酰化反应中的形态特性。结果表明,通过简单地调整前体水凝胶的含水量和结晶时间,可以制备具有短棒状、圆柱状、棒状和纳米级形状的 LTL 沸石。还发现 LTL 沸石的形态特性对其表面特性(表面积、孔体积、微孔通道数量、结构特性)和酸度(数量、强度和类型),其中这些特性影响它们在非微波瞬时加热条件下酰化 2-甲基呋喃的催化活性。此外,还讨论了温度和加热时间对2-甲基呋喃催化酰化动力学的影响,以及纳米LTL沸石与几种均相和多相催化剂的催化对比研究。
更新日期:2020-04-01
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