Cellulose-derived superparamagnetic carbonaceous solid acid catalyst for cellulose hydrolysis in an ionic liquid or aqueous reaction system

2013 ◽  
Vol 15 (8) ◽  
pp. 2167 ◽  
Author(s):  
Haixin Guo ◽  
Youfen Lian ◽  
Lulu Yan ◽  
Xinhua Qi ◽  
Richard Lee Smith
Keyword(s):  
Ionic Liquid ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Reaction System ◽  
Acid Catalyst ◽  
Cellulose Hydrolysis

scholarly journals Preparation and Characterization of Sulfonated Carbon from Candlenut Shell as Catalyst for Hydrolysis of Cogon Grass Cellulose into Glucose

2020 ◽  
Vol 32 (6) ◽  
pp. 1404-1408
Author(s):  
Taslim ◽  
Dian Halimah Batubara ◽  
Seri Maulina ◽  
Iriany ◽  
Okta Bani
Keyword(s):  
Solid Acid ◽  
Batch Reactor ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Cellulose Hydrolysis ◽  
Imperata Cylindrica ◽  
Hydrolysis Process ◽  
Catalyst Production ◽  
Hydrolysis Of

Cogon grass (Imperata cylindrica) is convertible into glucose by hydrolysis process, which usually requires a catalyst. A solid acid catalyst of sulfonated carbon was used in this work. This study aimed to observe the viability of candlenut shell as carbonaceous source in solid acid catalyst production and to characterize the sulfonated carbon. The carbonization was performed at 250-550 ºC for 4 h, while sulfonation was carried out at 100-180 ºC for 6 h. Sulfonated carbon was then characterized by H+ activity/acid density test, scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX) and Fourier transform infrared (FTIR) spectroscopy. Sulfonated carbon was then tested as a heterogeneous catalyst for hydrolysis reaction. The reaction was performed in a stainless steel batch reactor at 100 ºC for 6 h. Glucose formed by hydrolysis was measured by dinitrosalicylic acid (DNS) method. Results of this study suggested that sulfonated carbon derived from candlenut shell may be used as a catalyst for cogon grass cellulose hydrolysis to produce glucose

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 Acid Properties of GO and Reduced GO as Determined by Microcalorimetry, FTIR, and Kinetics of Cellulose Hydrolysis-Hydrogenolysis

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1393
Author(s):  
Van Chuc Nguyen ◽  
Sarah Kheireddine ◽  
Amar Dandach ◽  
Marion Eternot ◽  
Thi Thu Ha Vu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
High Mobility ◽  
Acid Catalyst ◽  
Strong Acid ◽  
Cellulose Hydrolysis ◽  
Acid Sites ◽  
Pyridine Adsorption ◽  
Nh3 Adsorption

Graphene oxide addresses increasing interests as a solid acid catalyst working in water for carbohydrate conversion. If there is a general agreement to correlate its unique catalytic performances to its ability to adsorb sugars, the origin of its acidity remains controversial. In this article, we study the acid strength of graphene oxide (GO) prepared by modified Hummers method and that of reduced GO by calorimetry of NH3 adsorption and by FTIR of pyridine adsorption. Very strong acid sites are detected on GO by calorimetry, while reduced graphene oxide (reGO) is not very acidic. The FTIR of pyridine adsorption shows the prevailing presence of Br∅nsted acid sites and a unique feature, the presence of pyridine coordinated by hydrogen bonds. This exceptionally strong Br∅nsted acidity is tentatively explained by the presence of graphene domains decorated by hydroxyl, carboxylic, or sulfonated groups within the GO sheet, resulting in a high mobility of the negative charges which makes the proton free and explains its strong acidity. Accordingly, only GO is active and selective for native cellulose hydrolysis, leading to 27% yield in glucose. Finally, we show that sugar alcohols cannot be formed directly from cellulose using GO combined with Pt/re-GO under hydrogen, explained by the reduction of oxygenated functions of GO. The instability of the functional groups of GO in a reducing atmosphere is the weak point of this peculiar solid acid.

Ultrasound-Ionic Liquid Pretreatment Enhanced Conversion of the Sugary Food Waste to 5-Hydroxymethylfurfural in Ionic Liquid/Solid Acid Catalyst System

2019 ◽  
Vol 150 (5) ◽  
pp. 1373-1388 ◽  
Author(s):  
Qinghua Ji ◽  
Xiaojie Yu ◽  
Abu El-Gasim A. Yagoub ◽  
Mo Li ◽  
Olugbenga Abiola Fakayode ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Food Waste ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Catalyst System ◽  
Ionic Liquid Pretreatment

Enhanced hydrolysis of bamboo biomass by chitosan based solid acid catalyst with surfactant addition in ionic liquid

2017 ◽  
Vol 174 ◽  
pp. 154-159 ◽  
Author(s):  
Wenqing Si ◽  
Yichen Li ◽  
Jie Zheng ◽  
Shun’an Wei ◽  
Dan Wang
Keyword(s):  
Ionic Liquid ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Hydrolysis Of

Practical and efficient synthesis of tetrahydrobenzo[b]pyran using caffeine supported on silica as an ionic liquid solid acid catalyst

2018 ◽  
Vol 15 (12) ◽  
pp. 2811-2819
Author(s):  
Mohammad Bakherad ◽  
Ali Keivanloo ◽  
Elmira Moradian ◽  
Amir H. Amin ◽  
Rahele Doosti ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Efficient Synthesis
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