scholarly journals One-step Preparation of Carbonaceous Solid Acid Catalysts by Hydrothermal Carbonization of Fructose for Cellulose Hydrolysis

2014 ◽  
Vol 72 (4) ◽  
pp. 502 ◽  
Author(s):  
Youfen Lian ◽  
Lulu Yan ◽  
Yu Wang ◽  
Xinhua Qi
Keyword(s):  
Solid Acid ◽  
Cellulose Hydrolysis ◽  
Hydrothermal Carbonization ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
One Step

Rational Design of Solid-Acid Catalysts for Cellulose Hydrolysis Using Colloidal Theory

2021 ◽  
Author(s):  
Ziyang Zhang ◽  
Geoffrey A Tompsett ◽  
Christopher Lambert ◽  
Sergio Granados-Focil ◽  
Michael T. Timko
Keyword(s):  
Rational Design ◽  
Solid Acid ◽  
Molecular Level ◽  
Cellulose Hydrolysis ◽  
Solid Acid Catalysts ◽  
Acid Catalysts

Solid-acid catalysts functionalized with catalytic groups have attracted intense interests for hydrolyzing cellulose into fermentable compounds. However, the solid-acid catalysts design has been guided by molecular level of interactions and...

Novel polymeric solid acid catalysts for cellulose hydrolysis

RSC Advances ◽  
2013 ◽  
Vol 3 (46) ◽  
pp. 24280 ◽  
Author(s):  
Xianghong Qian ◽  
Jing Lei ◽  
Sumith Ranil Wickramasinghe
Keyword(s):  
Solid Acid ◽  
Cellulose Hydrolysis ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Polymeric Solid

scholarly journals A New Method for Solid Acid Catalyst Evaluation for Cellulose Hydrolysis

2021 ◽  
Vol 2 (4) ◽  
pp. 645-669
Author(s):  
Maksim Tyufekchiev ◽  
Jordan Finzel ◽  
Ziyang Zhang ◽  
Wenwen Yao ◽  
Stephanie Sontgerath ◽  
...  
Keyword(s):  
Solid Acid ◽  
Reaction Pathway ◽  
Solid Acid Catalyst ◽  
False Negative ◽  
Acid Catalyst ◽  
Cellulose Hydrolysis ◽  
Solid Acids ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Supernatant Liquid

A systematic and structure-agnostic method for identifying heterogeneous activity of solid acids for catalyzing cellulose hydrolysis is presented. The basis of the method is preparation of a supernatant liquid by exposing the solid acid to reaction conditions and subsequent use of the supernatant liquid as a cellulose hydrolysis catalyst to determine the effects of in situ generated homogeneous acid species. The method was applied to representative solid acid catalysts, including polymer-based, carbonaceous, inorganic, and bifunctional materials. In all cases, supernatant liquids produced from these catalysts exhibited catalytic activity for cellulose hydrolysis. Direct comparison of the activity of the solid acid catalysts and their supernatants could not provide unambiguous detection of heterogeneous catalysis. A reaction pathway kinetic model was used to evaluate potential false-negative interpretation of the supernatant liquid test and to differentiate heterogeneous from homogeneous effects on cellulose hydrolysis. Lastly, differences in the supernatant liquids obtained in the presence and absence of cellulose were evaluated to understand possibility of false-positive interpretation, using structural evidence from the used catalysts to gain a fresh understanding of reactant–catalyst interactions. While many solid acid catalysts have been proposed for cellulose hydrolysis, to our knowledge, this is the first effort to attempt to differentiate the effects of heterogeneous and homogeneous activities. The resulting supernatant liquid method should be used in all future attempts to design and develop solid acids for cellulose hydrolysis.

scholarly journals Optimization of Salix Carbonation Solid Acid Catalysts for One-Step Synthesis by Response Surface Method

2019 ◽  
Vol 9 (8) ◽  
pp. 1518
Author(s):  
Ping Lu ◽  
Kebing Wang ◽  
Juhui Gong
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Solid Acid ◽  
Catalytic Performance ◽  
Solid Acid Catalysts ◽  
Esterification Reaction ◽  
Infrared Analysis ◽  
Acid Catalysts ◽  
Surface Method ◽  
One Step

Salix carboniferous solid acid catalysts were successfully obtained via one-step carbonization and sulfonation of Salix psammophila in the presence of concentrated sulfuric acid, which was then used in the esterification reaction between oleic acid and methanol to prepare the biodiesel. The esterification rate of the catalyst obtained from the reaction indicated the catalytic performance of the catalyst. Afterwards, the recycling performance of the catalyst was optimized and characterized based on Fourier transform infrared spectrometer. The catalyst performance was examined and optimized through the response surface method, and the catalyst was determined and characterized based on scanning electron microscope (SEM), elemental analysis, thermogravimetric analysis, and infrared analysis. The results suggested that the optimal preparation conditions were as follows: reaction temperature of 125 °C, reaction time of 102 min, solid–liquid ratio of 17 g/100 mL, standing time of 30 min, and the highest conversion level of 94.15%.

One-step process to produce furfural from sugarcane bagasse over niobium-based solid acid catalysts in a water medium

2020 ◽  
Vol 207 ◽  
pp. 106482 ◽  
Author(s):  
Mariana N. Catrinck ◽  
Paula S. Barbosa ◽  
Helder R.O. Filho ◽  
Robson S. Monteiro ◽  
Márcio H.P. Barbosa ◽  
...  
Keyword(s):  
Sugarcane Bagasse ◽  
Solid Acid ◽  
Solid Acid Catalysts ◽  
Water Medium ◽  
Acid Catalysts ◽  
Step Process ◽  
One Step

scholarly journals Synthesis of Porous Organic Polymer-Based Solid-Acid Catalysts for 5-Hydroxymethylfurfural Production from Fructose

Catalysts ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 656 ◽  
Author(s):  
Wilhemina Sebati ◽  
Suprakas Sinha Ray ◽  
Richard Moutloali
Keyword(s):  
Solid Acid ◽  
Oxidative Polymerization ◽  
Chlorosulfonic Acid ◽  
Solid Acid Catalysts ◽  
Liquid Fuels ◽  
Organic Polymer ◽  
Acid Catalysts ◽  
One Step ◽  
Magnetic Solid ◽  
Magnetic Solid Acid

Herein, we report the synthesis of nanoporous polytriphenylamine polymers (PPTPA) by a simple one-step oxidative polymerization pathway and the materials were sulfonated with chlorosulfonic acid to introduce acidic sulfonic groups to the polymers to form solid acid catalysts (SPPTPA). Magnetic properties were added to SPPTPA catalysts by depositing Fe3O4 nanoparticles to develop (FeSPPTPA) solid acid catalysts, for performing dehydration of fructose to 5-hydroxymethylfurfural (HMF), which is regarded as a sustainable source for liquid fuels and commodity chemicals. XRD, FTIR spectroscopy, SEM, TGA, and N2 sorption techniques were used to characterize synthesized materials. The FeSPPTPA80 nanocatalyst showed superior catalytic activities in comparison to other catalysts due to the nanorods that formed after sulfonation of the PPTPA polymeric material which gave the catalyst enough catalytic centers for dehydration reaction of fructose. The recyclability tests revealed that the magnetic solid acid catalysts could be reused for four consecutive catalytic runs, which made FeSPPTPA a potential nanocatalyst for production of HMF.

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