Preparation and investigation of highly selective solid acid catalysts with sodium lignosulfonate for hydrolysis of hemicellulose in corncob

Abstract

A novel carbon-based catalyst with high catalytic ability and xylose selectivity was prepared from sodium lignosulfonate.

Mathematical Model With Phosphate Activation Effect Validates Batch (R)-phenylacetylcarbinol Biotransformation Process Utilizing Candida Tropicalis Pyruvate Decarboxylase in Phosphate Buffer 

“…RSST for each set of biotransformation profiles is the summation of individual RSS values for product and by-products formation, substrates consumption, and enzyme deactivation profiles as shown in Eq. (7). MSE is the ratio of RSST and available degree of freedom (DOF) for each system.…”

“…The food and agriculture sectors had estimated USD 1.13 trillion (2019) and USD 1.84 billion (2018) in revenue respectively from microbial biotransformation [3][4][5] . Although chemocatalysts can offer the relatively high catalytic activity and selectivity for some reactions 6,7 , a number of organic compounds transformation processes still rely heavily on biocatalysts to achieve the desired level of enantioselectivity [8][9][10] . Thus, biocatalysts including enzymes, cells organelles, and whole cells in either native or artificially constructed forms 11 have been widely used in the production of both high-volume / low-value compounds such as ethanol [12][13][14][15][16][17] and low-volume / high-value chemical species including (R)-phenylacetylcarbinol (PAC) 2,15,[18][19][20][21][22][23][24] .…”

Generation of Reducing Sugars from Corncob by Magnetic Carbon-Based Solid Acid Pretreatment Combined with In Situ Enzymatic Hydrolysis

“…Among these, pretreatment by carbon-based solid acids (e.g., prepared by the incomplete carbonization of biomass materials and the subsequent sulfonation) have been identi ed as a novel catalyst, which are cheaper and exhibit good catalytic performance (Guo et al 2013). Various kinds of materials were used as precursor to investigate synthesize carbon-solid acid catalyst for pretreatment of lignocellulose through different synthesizing methods, such as lignin-containing spent liquor (Bai et al 2016), active carbon (Ansanay et al 2017), sodium lignosulfonate (Li et al 2018), and microcrystalline cellulose (Qi et al 2018).…”

Hydrolysis of Oligosaccharides and Polysaccharides on Sulfonated Solid Acid Catalysts: Relations between Adsorption Properties and Catalytic Activities

“… 11 , 17 Such sulfonated carbon catalysts were shown also for hydrolysis of various polysaccharides such as starch 17 − 21 and hemicellulose. 22 − 25 However, to develop environmentally friendly processes for biomass conversions, the sulfonated carbon catalysts are demanded to improve catalytic activity.…”