Heterogeneous heteropolyacid-based catalysts for hydrolysis of cellulosic biomass

2022 ◽  
pp. 117-154
Author(s):  
Xiaoxiang Luo ◽  
Hongguo Wu ◽  
Putla Sudarsanam ◽  
Hu Li
Keyword(s):  
Cellulosic Biomass ◽  
Hydrolysis Of

scholarly journals Structure of a Talaromyces pinophilus GH62 arabinofuranosidase in complex with AraDNJ at 1.25 Å resolution

2018 ◽  
Vol 74 (8) ◽  
pp. 490-495 ◽  
Author(s):  
Olga V. Moroz ◽  
Lukasz F. Sobala ◽  
Elena Blagova ◽  
Travis Coyle ◽  
Wei Peng ◽  
...  
Keyword(s):  
Plant Biomass ◽  
Cellulosic Biomass ◽  
Structural Basis ◽  
Side Chain ◽  
Polymeric Substrates ◽  
Hydrolysis Of ◽  
Insight Into ◽  
Positively Charged ◽  
Talaromyces Pinophilus ◽  
Resolution Structure

The enzymatic hydrolysis of complex plant biomass is a major societal goal of the 21st century in order to deliver renewable energy from nonpetroleum and nonfood sources. One of the major problems in many industrial processes, including the production of second-generation biofuels from lignocellulose, is the presence of `hemicelluloses' such as xylans which block access to the cellulosic biomass. Xylans, with a polymeric β-1,4-xylose backbone, are frequently decorated with acetyl, glucuronyl and arabinofuranosyl `side-chain' substituents, all of which need to be removed for complete degradation of the xylan. As such, there is interest in side-chain-cleaving enzymes and their action on polymeric substrates. Here, the 1.25 Å resolution structure of the Talaromyces pinophilus arabinofuranosidase in complex with the inhibitor AraDNJ, which binds with a K d of 24 ± 0.4 µM, is reported. Positively charged iminosugars are generally considered to be potent inhibitors of retaining glycosidases by virtue of their ability to interact with both acid/base and nucleophilic carboxylates. Here, AraDNJ shows good inhibition of an inverting enzyme, allowing further insight into the structural basis for arabinoxylan recognition and degradation.

Heterogeneous Acid-Catalyzed Hydrolysis of Cellulose

2012 ◽  
Vol 512-515 ◽  
pp. 421-425
Author(s):  
Jia Xin Liu ◽  
Yu Dong Huang
Keyword(s):  
Fossil Fuel ◽  
Solid Acid ◽  
Cellulosic Biomass ◽  
Biomass Hydrolysis ◽  
Key Technology ◽  
Selective Transformation ◽  
Hydrolysis Of Cellulose ◽  
Acid Catalyzed ◽  
Effective Use ◽  
Hydrolysis Of

With the world’s focus on reducing our dependency on fossil fuel resources, one of the challenges will be the development of efficient catalysts for selective transformation of cellulosic biomass. Hydrolysis of cellulose to glucose is a key technology for effective use of lignocellulose because glucose can be efficiently converted into various chemicals, biofuels, foods, and medicines. Thus far, substantial efforts have been devoted to the degradation of cellulose but these processes have significant drawbacks. Some of these problems can potentially be overcome with the application of solid acid catalysts. In this paper, recent studies on heterogeneous acid-catalyzed hydrolysis of cellulose are summarized.

scholarly journals An Overview of Recent Developments in Hetero-Catalytic Conversion of Cellulosic Biomass

2020 ◽  
Vol 4 ◽  
pp. 43-54
Author(s):  
Mohamed Rashid Ahmed-Haras ◽  
Nhol Kao ◽  
Md. Sakinul Islam ◽  
Liam Ward
Keyword(s):  
Sulfuric Acid ◽  
Catalytic Conversion ◽  
Cellulose Hydrolysis ◽  
Nanocrystalline Cellulose ◽  
Cellulosic Biomass ◽  
Heterogeneous Catalytic ◽  
Research Activities ◽  
Acid Catalyzed ◽  
Solid Acids Catalysts ◽  
Hydrolysis Of

In recent years, research activities involved in the production of nanocellulosic materials have grown substantially, rapidly stimulating the development of innovative production techniques. These materials are chemically extracted by acid-catalyzed Hydrolysis of the renewable and widely available cellulosic biomass. In this regard, sulfuric acid-catalyzed Hydrolysis of cellulosic biomass is a commonly known method for the production of nanostructured cellulose. However, this method may result in many disadvantages, including short catalyst-lifetime, corrosive to the reactor materials and managing the spent sulfuric acid resulted from the production process. This dictates the implementation of an eco-industrial alternative for the catalytic production of nanocrystalline cellulose (NCC). A viable and practical alternative is the application of heterogeneous (solid acids) catalysts, which can be more conducive in providing favorable platforms for efficient cellulose hydrolysis. This review highlights the current production methods of nanocrystalline cellulose. Further, recent literature on the heterogeneous-catalytic conversion of cellulosic biomass is briefly discussed. The limitations and disadvantages of these techniques are also described.

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