Investigation of sulfonated solid acid catalysts derived from oil palm kernel shell, corncob, and diatomaceous earth for esterification of ethanol and propanoic acid, characterisation and their performance

Solid acid catalysts with acid strength of -14.52 < H0 < -8.2 were prepared by sulfate treatment of the samples of boehmite calcined at 105-800 °C. Two preparation methods were used: impregnation of the calcined boehmite with 3.5 M H2SO4 or mixing of the boehmite samples with anhydrous aluminum sulfate, in both cases followed by calcination in nitrogen at 650 °C. The catalysts were characterized by measurements of surface area, adsorption of pyridine and benzene, acid strength measurements by the indicator method and by catalytic activity tests in the isomerization of cyclohexene, p-xylene and n-hexane. Properties of the catalysts prepared by both methods were comparable.

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Metal–Organic Framework-Based Solid Acid Materials for Biomass Upgrade

Transactions of Tianjin University ◽

10.1007/s12209-021-00298-4 ◽

2021 ◽

Author(s):

Yutian Qin ◽

Jun Guo ◽

Meiting Zhao

Keyword(s):

High Efficiency ◽

Solid Acid ◽

Metal Organic Framework ◽

Acid Sites ◽

Solid Acid Catalysts ◽

Future Research ◽

Acid Catalysts ◽

Metal Organic ◽

Biomass Transformation ◽

Organic Framework

AbstractBiomass is a green and producible source of energy and chemicals. Hence, developing high-efficiency catalysts for biomass utilization and transformation is urgently demanded. Metal–organic framework (MOF)-based solid acid materials have been considered as promising catalysts in biomass transformation. In this review, we first introduce the genre of Lewis acid and Brønsted acid sites commonly generated in MOFs or MOF-based composites. Then, the methods for the generation and adjustment of corresponding acid sites are overviewed. Next, the catalytic applications of MOF-based solid acid materials in various biomass transformation reactions are summarized and discussed. Furthermore, based on our personal insights, the challenges and outlook on the future development of MOF-based solid acid catalysts are provided. We hope that this review will provide an instructive roadmap for future research on MOFs and MOF-based composites for biomass transformation.

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Nonthermal Plasma Induced Fabrication of Solid Acid Catalysts for Glycerol Dehydration to Acrolein

Catalysts ◽

10.3390/catal11030391 ◽

2021 ◽

Vol 11 (3) ◽

pp. 391

Author(s):

Lu Liu ◽

Xiaofei Philip Ye

Keyword(s):

Solid Acid ◽

Nonthermal Plasma ◽

Temperature Programmed Desorption ◽

Argon Atmosphere ◽

Solid Acid Catalysts ◽

Acid Catalysts ◽

Pyridine Adsorption ◽

X Ray ◽

Glycerol Dehydration ◽

Temperature Programmed

The feasibility of fabricating better solid acid catalysts using nonthermal plasma (NTP) technology for biobased acrolein production is demonstrated. NTP discharge exposure was integrated in catalyst fabrication in air or argon atmosphere. The fabricated catalysts were characterized by Brunauer–Emmett–Teller surface area analysis, temperature-programmed desorption of ammonia, X-ray powder diffraction and Fourier-transform infrared spectroscopy of pyridine adsorption, in comparison to regularly prepared catalysts as a control. Further, kinetic results collected via glycerol dehydration experiments were compared, and improvement in acrolein selectivity was displayed when the catalyst was fabricated in the argon NTP, but not in the air NTP. Possible mechanisms for the improvement were also discussed.

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