Selective hydrolysis of hemicellulose from wheat straw by a nanoscale solid acid catalyst

Karakterisasi Dan Potensi Katalis Karbon Aktif Tersulfonasi Limbah Kayu Pada Reaksi Hidrolisis Sekam Padi Menggunakan Microwave

“…kekuatan asam dari gugus SO 3 H (Fraga et al, 2015;Li et al, 2013). Dari Gambar 3, dapat dilihat adanya serapan vibrasi masing-masing gugus fungsi yang terkandung pada sampel K dan KA-SO 3 H. Bilangan gelombang di sekitar 3400-an cm -1 merupakan puncak serapan dari vibrasi tarik gugus -OH dari karboksil dan fenolik grup (Zhong et al, 2015;Lin et al, 2018 (Suganuma et al, 2008), phenolic -OH dan -COOH menunjukkan kemampuan hidrofilik pada air dan reaktan . Gugus SO 3 H dan O=S=O disinyalir merupakan situs aktif kunci untuk reaksi hidrolisis yang memiliki kemampuan menghidrolisis ikatan α-1,4 dan β-1,4 glikosidik dari molekul selulosa yang teradsorp (Intaramas et al, 2018).…”

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

“…As reported, the presence of these byproducts was inevitable during the hydrolysis of lignocellulose. 4,24 Furfural was the degradation product of xylose or xylooligosaccharide. According to the eqn (3), the selectivity of xylose was calculated to be 86.75%.…”

“…Zhang prepared the solid acid catalyst Fe 3 O 4 /C-SO 3 H to catalyze corncob hydrolysis; 44.3% xylose yield was obtained at 160 C for 16 h. 22 Xu 23 used glucose and p-toluenesulfonic acid as raw materials to prepare solid acid (Gp-SO 3 H-H 2 O 2 ) for corncob hydrolysis and obtained a 77.5% xylose yield under the optimal condition. Zhong 24 prepared the SO 4 2À /Fe 2 O 3 solid acid catalyst and catalyzed the hydrolysis of wheat straw; 63.5% of xylose was obtained aer the treatment of hydrolysate with 1 M H 2 SO 4 at 100 C for 1 h. In this study, we used sodium lignosulfonate, a waste material from sulphite pulp, to prepare highly selective carbonbased solid acid catalysts, which can directly catalyze hemicellulose from biomass into xylose. Moreover, this study is different from the reported studies on random acquisition of xylo-oligosaccharides during the hydrolysis of lignocellulose catalysed by carbon-based solid catalysts.…”

Effect of β‐mannanase domain from Trichoderma reesei on its biochemical characters and synergistic hydrolysis of sugarcane bagasse

“…Hemicellulose, the second most abundant polysaccharides in nature, accounts for 20–35% of lignocellulose and is composed of heteromannans, xyloglucan, heteroxylans and mixed‐linkage glucan . Among these components, mannan is one of the major constituents of hemicellulose and can be classified into four subfamilies: linear mannan, glucomannan, galactomannan and galactoglucomannan .…”

“…Hemicellulose, the second most abundant polysaccharides in nature, accounts for 20-35% of lignocellulose and is composed of heteromannans, xyloglucan, heteroxylans and mixed-linkage glucan. [1][2][3][4] Among these components, mannan is one of the major constituents of hemicellulose and can be classified into four subfamilies: linear mannan, glucomannan, galactomannan and galactoglucomannan. 5 Hydrolysis of mannan requires the synergistic reaction of several glycoside hydrolases (GH), including -mannanase, -glucosidase and -mannosidase, 6 in which -mannanase (EC 3.2.1.78) is widely applied in food and feeds, paper and pulp, and detergent industries, 7 and has attracted increasing interest among researchers.…”