Influence of the acidity of solid catalyst HSO₃-ZSM-5 on the hydrolysis of pretreated corncob

Abstract

The influence of acidity of HSO3-ZSM-5 zeolite on biomass hydrolysis was investigated.

Production of 5-hydroxymethylfurfural (HMF) from rice-straw biomass using a HSO3–ZSM-5 zeolite catalyst under assistance of sonication

“…Aer the sulfonation, new peaks observed at 693, 1068, 2589 and 2932 cm À1 indicate the presence of S-O, S]O bonds and strong hydrogen bond in HSO 3 groups. 26,27,31 This suggests that sulfonic (HSO 3 ) group was successfully added to the ZSM-5 zeolite structure. These results are once again conrmed by EDS data as shown in Fig.…”

“…Sulfonic acid-functionalized mesoporous ZSM-5 zeolite was synthesized by a method following a report. 26 In typical, rst mesoporous ZSM-5 was synthesized by hydrothermal method using hexadecyl trimethyl ammonium bromide (C 16 H 33 (CH 3 ) 3 -NBr, CTAB) as a mesogenous templates. The synthetic solution was hydrothermally heated at 170 C for 24 h in an autoclave.…”

“…ZSM-5 zeolite would contain two types of acid site: Brønsted and Lewis site aer ion exchange process with cation Me n+ or adding sulfonic acid function group into the structure of zeolites. [24][25][26][27] There have been some reports on application of zeolite, especially ZSM-5 zeolite for conversion of glucose and carbohydrate into HMF. 21,22 However, the efficiency of the process and yield of HMF was not high.…”

Multi-Step Exploitation of Raw Arundo donax L. for the Selective Synthesis of Second-Generation Sugars by Chemical and Biological Route

“…Therefore, common stainless steels cannot be adopted for the acid hydrothermal treatments, which instead require special alloys, such as various grades of Hastelloy, zirconium or other corrosion-resistant alloys, which ensure excellent corrosion resistance to acids, even at high severity conditions [37]. These issues drove the research towards the employment of low-cost acid solid catalysts, such as styrene-based sulfonic acid resins (Amberlysts) [38][39][40][41][42][43][44]. The use of these catalysts can provide a large number of advantages over the traditional homogeneous acid catalysts: (i) better reaction control, (ii) reduced formation of by-products, (iii) easy and safe operation with minor corrosion problems compared to homogeneous catalysis, (iv) advantageous recovery of the catalyst with less waste disposal.…”

Aqueous-Phase Cellulose Hydrolysis over Zeolite HY Nanocrystals Grafted on Anatase Titania Nanofibers

“…Typical peak of Ti-O was detected at about 946 cm -1 and 813 cm -1 in titania nanofibres, however, this peak was not detected in HY-TiO 2 -80, HY-TiO 2 -100, HY-TiO 2 -120 and HY-TiO 2 -140, because it may be overlapped by the strong band of the zeolite HY nanocrystals on the titania nanofibres. 30,31 Besides, The broad peak at 3450 cm -1 and 1629 cm -1 were assigned to the stretching vibration and bending vibration of O-H bond in absorbed water respectively, 32,33 while the weak peak at around 2924 cm -1 is probably assigned to carbonaceous contaminants. 34 Hence, all these observations are consistent with the XRD results, indicating that the zeolite HY nanocrystals are well grafted onto the titania nanofibres.…”