Synergetic Effect of Brønsted/Lewis Acid Sites and Water on the Catalytic Dehydration of Glucose to 5‐Hydroxymethylfurfural by Heteropolyacid‐Based Ionic Hybrids
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DOI: 10.1002/open.201800138
Abstract: Abstract The effective dehydration of glucose to 5‐hydroxymethylfurfural (HMF) has attracted increasing attention. Herein, a series of sulfonic‐acid‐functionalized ionic liquid (IL)–heteropolyacid (HPA) hybrid catalysts are proposed for the conversion of glucose to HMF. A maximum… read more here.
Keywords: lewis acid; nsted lewis; water; dehydration glucose ... See more keywords
Insighting into the Effect of Acid Sites on the Catalytic Performance of HZSM-5 During the One-Step Preparation of Isoprene by Formaldehyde and Isobutene
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DOI: 10.1007/s10562-020-03306-9
Abstract: In this paper, by changing the Si/Al ratio of the catalyst, the reaction temperature and the weight hourly space velocity, the optimal reaction conditions for the preparation of isoprene in one-step condensation of isobutene and… read more here.
Keywords: preparation isoprene; formaldehyde isobutene; acid sites; one step ... See more keywords
Effect of acid sites on catalytic destruction of trichloroethylene over solid acid catalysts
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DOI: 10.1007/s11814-016-0299-8
Abstract: The catalytic destruction of trichloroethylene (TCE) over several solid acid catalysts (HZSM-5, γ-Al2O3 and SBA-15/P) was evaluated under dry conditions. The activity order was found to be: HZSM-5>SBA-15/P>γ-Al2O3. It was reported that Brønsted and Lewis… read more here.
Keywords: destruction trichloroethylene; solid acid; catalytic destruction; acid sites ... See more keywords
H/D reactivity and acidity of Brønsted acid sites of MWW zeolites: Comparison with MFI zeolite
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DOI: 10.1016/j.apcata.2019.02.024
Abstract: Abstract Acid site strength in MWW and MFI zeolites was investigated by isotopic exchange reaction between deuterated hydroxyl groups of zeolites and ethane molecules. The course of the reaction was monitored by FT-IR spectroscopy through… read more here.
Keywords: strength; reaction; acid sites; mww zeolites ... See more keywords
Efficient magnetic recoverable acid-functionalized-carbon catalysts for starch valorization to multiple bio-chemicals
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DOI: 10.1016/j.cattod.2016.07.007
Abstract: Abstract A series of solid acid catalysts were prepared by functionalization of graphene-oxide (GO) and MWCNT-oxide (MWCNTO) with triflic and sulfonic acids affording a triflate-functionalized graphene oxide (GO@SO3CF3), and a sulfonated MWCNT (μ-CNT-SO3H). To facilitate… read more here.
Keywords: acid functionalized; magnetic recoverable; acid sites; efficient magnetic ... See more keywords
Enhanced chemical activity and wettability at adjacent Brønsted acid sites in HZSM-5
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DOI: 10.1016/j.cattod.2018.02.054
Abstract: Abstract The adjustable acid sites in zeolites and its well-defined pore structure allows for a fine-tuning of the catalytic performance. The activity and selectivity of several reactions have been shown to be dependent on the… read more here.
Keywords: activity wettability; acid sites; chemical activity; sites hzsm ... See more keywords
Synthesis of Rh nanoparticles encapsulated in ZSM-5 and its application for methanol to olefin over acid sites with simultaneous production of hydrogen over Rh
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DOI: 10.1016/j.cattod.2020.04.007
Abstract: Abstract Metal-loaded zeolites possess metal and solid acid catalysis and therefore can be applied for complex reactions where different reactions proceed on different type of active sites. The optimization of each active sites, such as… read more here.
Keywords: active sites; nanoparticles encapsulated; methanol; metal ... See more keywords
Rational design and fabrication of surface molecularly imprinted polymers based on multi-boronic acid sites for selective capture glycoproteins
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DOI: 10.1016/j.cej.2019.02.140
Abstract: Abstract Increasing the number of recognition sites is an available way to improve the efficiency of the identification of surface molecular imprinting polymers. In this work, glycoprotein imprinted nanoparticles (SiO2-MIPs) based on multi-boronic acid sites… read more here.
Keywords: multi boronic; surface; boronic acid; based multi ... See more keywords
Variations and geological significance of solid acidity during smectite illitization
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DOI: 10.1016/j.clay.2021.106035
Abstract: Abstract Solid acidity is an inherent property of clay minerals and intimately related to the crystal chemistry and structure. Smectite illitization is a common phenomenon in mudstones, during which the variations of solid acidity are… read more here.
Keywords: illitization; solid acidity; acid sites; clay ... See more keywords
Enhanced catalytic performance in butylene cracking by hierarchical surface silicon-rich ZSM-5
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DOI: 10.1016/j.fuproc.2017.04.010
Abstract: Abstract In the process of butylene catalytic cracking, the amount, location and strength of acid sites of the catalyst play an important role in suppressing the undesired reactions. Hydrothermal dealumination is widely used to adjust… read more here.
Keywords: silicon rich; surface; surface silicon; hierarchical surface ... See more keywords
ZSM-5 extrudates modified with phosphorus as a super effective MTP catalyst: Impact of the acidity on binder
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DOI: 10.1016/j.fuproc.2017.08.020
Abstract: Abstract ZSM-5 extrudates catalyst was modified by wet-impregnation using phosphoric acid with various mass concentration (5%, 10% and 15%) and their performances were respectively evaluated in the methanol to propylene (MTP) reaction. This work focused… read more here.
Keywords: zsm extrudates; acid sites; binder; mtp ... See more keywords