Hydrolysis of hemicellulose catalyzed by hierarchical H-USY zeolites – The role of acidity and pore structure

Hierarchical Zeolites and their Catalytic Performance in Selective Oxidative Processes

“…[23][24][25] In this regard, both microporous and hierarchical (mesoporous) zeolites have been extensively employed in a range of acid-catalyzed processes, including alkylations and acylations as well as, more recently, transformations of biomass-derived compounds. [23,[26][27][28] Other microporous zeolites (e.g., ZSM-5) have also been reported in selected transition-metal-free alkane functionalizations. [29] Interestingly, zeolites have rarely been reported in selective oxidation processes.…”

Chemocatalytic hydrolysis of cellulose into glucose over solid acid catalysts

“…Sulfuric acid (H 2 SO 4 ), nitric acid (HNO 3 ), perchloric acid (HClO 4 ), phosphoric acid (H 3 PO 4 ), hydrochloric acid (HCl), hydrofluoric acid (HF) and formic acid (FA) are known as a typical type of homogeneous acids [40][41][42][43][44][45][46][47][48]. Although they exhibit reasonable prices and good catalytic activities, their practical applications are difficult due to a lot of problems including reactor corrosion, waste treatment and poor recyclability as well as severe reaction temperature [49][50][51][52][53][54]. In contrast to homogeneous acids, cellulases that can be derived from Trichoderma reesei, Aspergillus niger, Aspergillus nidulan and Penicilinium funiculosum are more selective and competitive to hydrolyze cellulose into glucose at lower reaction temperature [55][56][57][58][59].…”

Hydrolysis of cellobiose catalyzed by zeolites—the role of acidity and micropore structure

“…Tel: +86 371 67781780; Fax: +86 371 67766076 E-mail address: yangxiaomei@zzu.edu.cn (X. Yang). hydrolysis of hemicelluloses [12]. It was found that meso/macropores and large external area benefited both the catalytic activity and the selectivity for monosaccharides.…”

“…Oligosaccharides will be further hydrolyzed to monosaccharides catalyzed by the acid sites in the micropores. The contribution of the meso/macropore and the external surface area to the catalytic hydrolysis of biomass has been studied widely [8,12,14]. However, the effects of the acidity and micropore structure of zeolite on the hydrolysis of oligosaccharides from cellulose to monosaccharides in water are not very clear till now.…”