Direct conversion of glucose to 5-hydroxymethylfurfural using a mixture of niobic acid and niobium phosphate as a solid acid catalyst

Catrinck, Mariana N.; Ribeiro, Emerson Schwingel; Monteiro, Robson S.; Ribas, Rogério M.; Barbosa, Márcio Henrique Pereira; Teófilo, Reinaldo F.

doi:10.1016/j.fuel.2017.08.035

Cited by 71 publications

(33 citation statements)

References 43 publications

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“…The decreases in the BET surface areas of IL/CaX were attributed to the immobilization of ionic liquid on porous CaX, resulting in the block of micropores and decrease of surface areas [27]. The structural properties of the supported ionic liquid on zeolite agreed with the reported values in Reference [28]. This result indicated that [Emim][BF4] had been successfully supported onto the framework of CaX zeolite.…”

Section: Catalytic Characterizationsupporting

confidence: 83%

Zeolite Supported Ionic Liquid Catalysts for the Hydrochlorination of Acetylene

et al. 2018

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An efficient and stable heterogeneous Zeolite Supported Ionic Liquid Catalyst (IL/CaX) has been explored in acetylene hydrochlorination reaction. The IL/CaX catalyst exhibits excellent space time yields of vinyl chloride (VCM), when compared to the benchmark of Au/C systems. Through characterization and kinetic studies, the reaction follows a two-site mechanism, which is described as the adsorbed hydrogen chloride on the Ca2+ in zeolite, reacting with the adsorbed acetylene on the cation of ionic liquid to form vinyl chloride. The catalytic reaction takes place at the IL/CaX interface, whilst the upper interphase IL/CaX is not active. The deactivation of the catalyst is caused by the dissolving byproducts in the ionic liquid layer, which can be reactivated by a simple vacuum procedure. It is of great significance to study and develop green non-mercury catalysts, in acetylene hydrochlorination.

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Section: Catalytic Characterizationsupporting

confidence: 83%

Zeolite Supported Ionic Liquid Catalysts for the Hydrochlorination of Acetylene

et al. 2018

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“…4). 14,55 The amorphous nature of these two materials contrasts with the crystalline structure of Nb 2 O 5 -Comm (Fig. 4), with the pattern corresponding to the orthorhombic phase mainly consisting of NbO 6 octahedra (JCPDS No.…”

Section: Catalytic Experimentsmentioning

confidence: 99%

Niobium oxide prepared through a novel supercritical-CO₂-assisted method as a highly active heterogeneous catalyst for the synthesis of azoxybenzene from aniline

et al. 2019

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“…Biomass, as a renewable carbohydrate found in nature, is a promising alternative to petroleum resources for the production of fuels, carbon-based chemicals, and materials [1,2]. e pretreatment process of biomass before transformation is particularly important owing to the presence of various active components (e.g., avonoids and alkaloids) in biomass.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Chelerythrine from Toddalia asiatica (L.) Lam. by ZSM-5

Liu

Guo

Zhuo-bing

et al. 2020

Advances in Polymer Technology

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Separation and purification of active components from biomass by inorganic materials during the pretreatment process of hydrothermal conversion are studied in this work. The batch experiment results show that an initial solution pH of 6 favors chelerythrine adsorption, and the optimum adsorbent dosage is 2.0 g. The adsorption mechanism of ZSM-5 for chelerythrine is investigated by adsorption kinetics, isotherm adsorption models, and thermodynamics analysis. The results show that the kinetics data fit the pseudo-second-order model well (R2 = 0.9991), and the intraparticle diffusion model has 3 diffusion stages, preliminarily indicating that chemisorption plays a major role in the adsorption process, and the sorption mechanism includes intraparticle, external, and boundary diffusion. The adsorption isotherms agree well with the Langmuir model, indicating the occurrence of monolayer molecular adsorption during the adsorption process. Meanwhile, the maximum adsorption capacity is 2.327, 2.072, and 1.877 mg/g at different temperatures (288 K, 298 K, and 308 K), respectively. The thermodynamic data demonstrate that the adsorption process is exothermic and spontaneous in nature. These observed results clearly confirm that ZSM-5 has potential superior properties for the enrichment and purification of alkaloids during the pretreatment of biomass.

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Direct conversion of glucose to 5-hydroxymethylfurfural using a mixture of niobic acid and niobium phosphate as a solid acid catalyst

Cited by 71 publications

References 43 publications

Zeolite Supported Ionic Liquid Catalysts for the Hydrochlorination of Acetylene

Zeolite Supported Ionic Liquid Catalysts for the Hydrochlorination of Acetylene

Niobium oxide prepared through a novel supercritical-CO₂-assisted method as a highly active heterogeneous catalyst for the synthesis of azoxybenzene from aniline

Adsorption of Chelerythrine from Toddalia asiatica (L.) Lam. by ZSM-5

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Direct conversion of glucose to 5-hydroxymethylfurfural using a mixture of niobic acid and niobium phosphate as a solid acid catalyst

Cited by 71 publications

References 43 publications

Zeolite Supported Ionic Liquid Catalysts for the Hydrochlorination of Acetylene

Zeolite Supported Ionic Liquid Catalysts for the Hydrochlorination of Acetylene

Niobium oxide prepared through a novel supercritical-CO2-assisted method as a highly active heterogeneous catalyst for the synthesis of azoxybenzene from aniline

Adsorption of Chelerythrine from Toddalia asiatica (L.) Lam. by ZSM-5

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Niobium oxide prepared through a novel supercritical-CO₂-assisted method as a highly active heterogeneous catalyst for the synthesis of azoxybenzene from aniline