Synthesis of Ceria and Sulfated Zirconia Catalysts Supported on Mesoporous SBA-15 toward Glucose Conversion to 5-Hydroxymethylfurfural in a Green Isopropanol-Mediated System

Abstract

In this work, a facile synthesis of ceria and sulfated zirconia (SZ) incorporated SBA-15 catalyst was conducted. The supported SZ reveals promising Brønsted/Lewis acid and relatively low base strength, and the base strength of the catalyst is significantly enhanced by introducing highly dispersed ceria into the network of SZ incorporated SBA-15. Systematic study of catalyst activities were carried out in iPrOH/DMSO solvent conversion of glucose to 5-hydroxymethylfurfural (HMF). It is found that the isomerization process of glucose to fructose was promoted by coexisting base and Lewis acid sites, and the dehydration reaction of reactively formed fructose to HMF was directed by Brønsted acid sites. Up to 66.5% HMF yield and 70.8% selectivity can be obtained in a 90 vol % iPrOH-mediated DMSO solvent. Through the reaction system developed in this paper, use of a large amount of environmentally hazardous solvent can be avoided, and a new method of large-scale economically viable processes for biomass conservation is provided.

Tuning Brønsted and Lewis acidity on phosphated titanium dioxides for efficient conversion of glucose to 5-hydroxymethylfurfural

“…[7][8][9] However, this process requires a catalytic system capable of performing (i) glucose isomerization to fructose catalyzed by a Lewis acid and (ii) fructose dehydration to HMF which is favored under Brønsted acid conditions. [10][11][12] Consequently, the use of bifunctional solid catalysts, consisting of both Lewis and Brønsted acid sites, is an efficient approach to promote glucose conversion to HMF. 11,13 In this context, different metal phosphates were reported for catalyzing glucose to HMF in a biphasic system of water/methyl isobutyl ketone (MIBK), producing HMF selectivity range from 30% to 60% depending on the ratio of the Brønsted to Lewis acid sites.…”

“…[10][11][12] Consequently, the use of bifunctional solid catalysts, consisting of both Lewis and Brønsted acid sites, is an efficient approach to promote glucose conversion to HMF. 11,13 In this context, different metal phosphates were reported for catalyzing glucose to HMF in a biphasic system of water/methyl isobutyl ketone (MIBK), producing HMF selectivity range from 30% to 60% depending on the ratio of the Brønsted to Lewis acid sites. 14 Yabushita and coworkers studied the glucose dehydration over a phosphate modied Zr-based metal-organic framework (MOF), NU-1000, and reported the HMF selectivity of 64% at 150 C in a biphasic system of water/2-propanol.…”

Catalytic Activity of Mixed Al2O3-ZrO2 Oxides for Glucose Conversion into 5-Hydroxymethylfurfural

“…Thus, Zhang et al [46] evaluated the influence of calcination temperature for ZrO 2 , attaining total glucose conversion with a selectivity of HMF about 40%. Moreover, ZrO 2 has been frequently deposited over ordered mesoporous structures to increase surface area and improve reactant and product diffusion [52][53][54]. Likewise, aluminum oxides have been employed to dope mesoporous solids, increasing their acidity for its use as both catalyst and support.…”

Development of Hierarchical Porous MOF‐Based Catalyst of UiO‐66(Hf) and Its Application for 5‐Hydroxymethylfurfural Production from Cellulose

“…And recent reports have focused on the synthesis of the versatile organic intermediates of 5‐HMF with a good research prospect due to its inclusive application in the fields of pesticides, medicines, biofuel chemistry and so forth ,. The production of 5‐HMF from cellulose involves a series of reaction steps, including de‐polymerization, hydrolysis, isomerization, and finally dehydration . Among various methods for the conversion of cellulose into 5‐HMF, chemical transformation is considered as one of the most logical methods in the catalytic process because of its convenience, high efficiency and extensive practicability …”