Sustainable Sorbitol Dehydration to Isosorbide using Solid Acid Catalysts: Transition from Batch Reactor to Continuous Flow System

Nanoscale CeO2–MoO3/SiO2 solid acid shows an outstanding catalytic performance in the oxidative coupling of amines under industrially-favourable conditions.

Download Full-text

Development of a continuous-flow tubular reactor for synthesis of 5-hydroxymethylfurfural from fructose using heterogeneous solid acid catalysts in biphasic reaction medium

New Journal of Chemistry ◽

10.1039/d0nj05978a ◽

2021 ◽

Author(s):

Sadra Souzanchi ◽

Laleh Nazari ◽

Kasanneni Tirumala Venkateswara Rao ◽

Zhongshun Yuan ◽

Zhongchao Tan ◽

...

Keyword(s):

Continuous Flow ◽

Solid Acid ◽

Tubular Reactor ◽

Reaction Medium ◽

Solid Acid Catalysts ◽

Acid Catalysts ◽

Industrial Chemicals ◽

Platform Chemical ◽

Biphasic Reaction ◽

Heterogeneous Solid

5-Hydroxymethylfurfural (5-HMF) is an important biomass-derived platform chemical used to produce polymers, biofuels and other valuable industrial chemicals. In this work, 5-HMF is synthesized from biomass-derived fructose through a continuous...

Download Full-text

Preparation of Strong Acid Catalysts by Sulfate Treatment of Calcined Boehmite

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19922241 ◽

1992 ◽

Vol 57 (11) ◽

pp. 2241-2247 ◽

Cited By ~ 2

Author(s):

Tomáš Hochmann ◽

Karel Setínek

Keyword(s):

Catalytic Activity ◽

Surface Area ◽

Aluminum Sulfate ◽

Solid Acid ◽

Strong Acid ◽

Acid Strength ◽

Solid Acid Catalysts ◽

Acid Catalysts ◽

Preparation Methods ◽

Indicator Method

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.

Download Full-text

Effect of electroporation in a continuous flow system on bioaccumulation of magnesium, zinc and calcium ions in Lactobacillus rhamnosus B 442 cells

Bioelectrochemistry ◽

10.1016/j.bioelechem.2021.107769 ◽

2021 ◽

Vol 140 ◽

pp. 107769

Author(s):

Sujka Monika ◽

Pankiewicz Urszula ◽

Flisar Karel ◽

Miklavčič Damijan ◽

Haberl-Meglič Sasa

Keyword(s):

Calcium Ions ◽

Continuous Flow ◽

Flow System ◽

Lactobacillus Rhamnosus ◽

Continuous Flow System

Download Full-text

Developments of a continuous-flow system with immobilized biocatalysts towards sustainable bioprocessing

Reaction Chemistry & Engineering ◽

10.1039/d1re00189b ◽

2021 ◽

Author(s):

Apisit Naramittanakul ◽

Supacha Buttranon ◽

A. Petchsuk ◽

Pimchai Chaiyen ◽

Nopphon Weeranoppanant

Keyword(s):

Continuous Flow ◽

Flow System ◽

Continuous Flow System ◽

P Immobilization ◽

Feasible Solutions

Immobilization methods have emerged as feasible solutions for increasing the re-usability of biocatalysts, and for simplifying their separation from the desired products. Immobilized biocatalysts can directly be applied to a...

Download Full-text

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.

Download Full-text

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.

Download Full-text