Innovative Synthesis and Catalytic Proficiency of Mg/Al/La Mixed Oxide Catalysts in Glycerol Transesterification with Dimethyl Carbonates

IF 1.3 4区 化学 Q4 CHEMISTRY, PHYSICAL
M. Malyaadri, K. Jagadeeswaraiah, T. Narasimha murthy, PRG. Nallappa reddy
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引用次数: 0

Abstract

A series of Mg/Al/La mixed oxide catalysts were synthesized using an alkali-free coprecipitation method and calcined at various temperatures. The catalysts were characterized using Fourier transform infrared spectroscopy, X-ray diffraction, and temperature-programmed desorption of CO2. These catalysts were evaluated for transesterification of glycerol with dimethyl carbonates to yield glycerol carbonates. The catalyst with an Mg : Al : La weight ratio of 3 : 1 : 1 demonstrated optimum performance in the formation of glycerol carbonates and exhibited excellent activity even at 75°C. However, its activity decreased during recycling. The effects of various parameters, such as reaction temperature, catalyst concentration, and the molar ratio of glycerol to dimethyl carbonates, were studied to optimize the reaction conditions.

Abstract Image

Mg/Al/La混合氧化物催化剂在甘油与碳酸二甲酯酯交换反应中的创新合成及催化性能
采用无碱共沉淀法合成了一系列Mg/Al/La混合氧化物催化剂,并在不同温度下进行煅烧。采用傅里叶变换红外光谱、x射线衍射和程序升温解吸CO2对催化剂进行了表征。这些催化剂对甘油与碳酸二甲酯酯交换制碳酸甘油进行了评价。Mg: Al: La质量比为3:1:1的催化剂在形成碳酸甘油方面表现出最佳的性能,即使在75°C时也表现出优异的活性。然而,在回收过程中,其活性下降。考察了反应温度、催化剂浓度、甘油与碳酸二甲酯的摩尔比等参数对反应的影响,优化了反应条件。
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来源期刊
Kinetics and Catalysis
Kinetics and Catalysis 化学-物理化学
CiteScore
2.10
自引率
27.30%
发文量
64
审稿时长
6-12 weeks
期刊介绍: Kinetics and Catalysis Russian is a periodical that publishes theoretical and experimental works on homogeneous and heterogeneous kinetics and catalysis. Other topics include the mechanism and kinetics of noncatalytic processes in gaseous, liquid, and solid phases, quantum chemical calculations in kinetics and catalysis, methods of studying catalytic processes and catalysts, the chemistry of catalysts and adsorbent surfaces, the structure and physicochemical properties of catalysts, preparation and poisoning of catalysts, macrokinetics, and computer simulations in catalysis. The journal also publishes review articles on contemporary problems in kinetics and catalysis. The journal welcomes manuscripts from all countries in the English or Russian language.
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