Browsing by author "Huang, Jun"
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Acidity enhanced [Al]MCM-41 via ultrasonic irradiation for the Beckmann rearrangement of cyclohexanone oxime to ɛ-caprolactam
Wang, Zichun; Ling, Huajuan; Shi, Jeffrey; Stampfl, Catherine; Yu, Aibing; Hunger, Michael; Huang, JunPublished 2018Using solid acid catalysts to replace liquid acids in the liquid-phase Beckmann rearrangement of cyclohexanone oxime (CHO) into ɛ-caprolactam (CPL) is crucial for the environmentally friendly production of synthetic fibers, ...Open AccessArticle -
Active sites and mechanism of the direct conversion of methane and carbon dioxide to acetic acid over the zincmodified H-ZSM-5 zeolite
Zhang, Peng; Xuejing, Yang; Xiuli, Hou; Mi, Jianli; Yuan, Zhizhong; Huang, Jun; Stampfl, CatherinePublished 2019Conversion of CH4 and CO2 to higher value chemicals will contribute to alleviating green-house gas emissions and the global fossil fuel shortage. Introducing metals into zeolites is used to catalytically convert CH4 and ...Open AccessArticle -
Benzylation of Arenes with Benzyl Chloride over H-Beta Zeolite: Effects from Acidity and Shape-selectivity
Wang, Zichun; Wang, Lei; Zhou, Zheng; Zhang, Yunyao; Li, Haitao; Stampfl, Catherine; Liang, Changhai; Huang, JunPublished 2017H-Beta zeolites with various Si/Al ratios have been prepared for the liquid-phase benzylation of various arenes with benzyl chloride (BzCl). 29Si and 27Al MAS NMR spectroscopy revealed the incorporation of Al into the ...Open AccessArticle -
Brønsted acid sites based on penta-coordinated aluminum species
Wang, Zichun; Jiang, Yijiao; Laufen, Olivier; Trébosc, Julien; Kim, Kyung Duk; Stampfl, Catherine; Baiker, Alfons; Amoureux, Jean-Paul; Huang, JunPublished 2016Zeolites and amorphous silica-alumina (ASA), which both provide Brønsted acid sites (BASs), are the most extensively used solid acid catalysts in the chemical industry. It is widely believed that BASs consist only of ...Open AccessArticle -
Catalytic arene alkylation over H-Beta zeolite: Influence of zeolite shape selectivity and reactant nucleophilicity
Xin, Zeng; Wang, Zichun; Ding, Jia; Wang, Leizhi; Jiang, Yijiao; Stampfl, Catherine; Hunger, Michael; Huang, JunPublished 2019Renewable arenes and aromatic alcohols can be derived from lignocellulose by biorefineries, which has been considered as a sustainable alternative to replace petrochemical feedstocks in the synthesis of monobenzylation ...Open AccessArticle -
The comparative effect of particle size and support acidity on hydrogenation of aromatic ketones
Kim, Kyung Duk; Wang, Zichun; Tao, Yongwen; Ling, Huajuan; Yuan, Yuan; Zhou, Cuifeng; Liu, Zongwen; Gaborieau, Marianne; Huang, Jun; Yu, AibingPublished 2019A comparative study was reported for both the effects of shape‐confined cubic Pd particle size (8, 13, and 21 nm) and surface property of most commonly used supports (SiO2, Al2O3, and silica‐alumina) on catalytic performance ...Open AccessArticle -
Composition-structure-function correlation of Ca/Zn/AlOx catalysts for the ketonization of acetic acid
Ling, Huajuan; Wang, Zichun; Wang, Leizhi; Stampfl, Catherine; Wang, Dan; Chen, Jianfeng; Huang, JunPublished 2020Ketonization can efficiently convert carboxylic acids into ketones, promising in bio-oil upgrading. For economic-sustainable bio-refining, Ca/Zn/AlOx (CZA) metal oxides with various Ca/Zn/Al ratios have been prepared by ...Open AccessArticle -
Confinement Impact for the Dynamics of Supported Metal Nanocatalyst
Liu, Huimin; Wang, Hui; Liu, Zongwen; Ling, Huajuan; Zhou, Cuifeng; Li, Huawei; Stampfl, Catherine; Liao, Xiaozhou; Wang, Jiuling; Shi, Xinghua; Huang, JunPublished 2018Supported metal nanoparticles play key roles in nanoelectronics, sensors, energy storage/conversion, and catalysts for the sustainable production of fuels and chemicals. Direct observation of the dynamic processes of ...Open AccessArticle -
Cooperation of hierarchical pores with strong Brønsted acid sites on SAPO-34 catalysts for the glycerol dehydration to acrolein
Zhao, Shufang; Wang, Wei David; Wang, Lizhuo; Wang, Wei; Huang, JunPublished 2020The hierarchical SAPO-34 zeolites have been prepared with the simultaneous generation of strong Brønsted acid sites (BASs) via a post-synthetic method, which allows the cooperation of the positive effects of both porous ...Open AccessArticle -
The cooperative effect of Lewis and Brønsted acid sites on Sn-MCM-41 catalysts for the conversion of 1,3-dihydroxyacetone to ethyl lactate
Kim, Kyung Duk; Wang, Zichun; Jiang, Jijiao; Hunger, Michael; Huang, JunPublished 2019Lactic acid and alkyl lactates are widely applied in the production of food, cosmetics, pharmaceuticals, organic synthesis and biodegradable polymers. They can be prepared via one-pot synthesis from renewable trioses, such ...Open AccessArticle -
Correlation between Acidity and Catalytic Performance of Mesoporous Zirconium Oxophosphate in Phenylglyoxal Conversion
Xu, Haimei; Wang, Zichun; Miao, Zhichao; Zhu, Yuxiang; Marianov, Aleksei; Wang, Lizhuo; Castignolles, Patrice; Gaborieau, Marianne; Huang, Jun; Jiang, YijiaoPublished 2019-01-01The one-step conversion of α-keto aldehydes to α-hydroxy carboxylic acids and their derivatives using solid acids is of great appeal in biomass utilization. In this work, ordered mesoporous zirconium oxophosphate (ZrPO) ...Open AccessArticle -
Development of Fe-Promoted Ni–Al Catalysts for Hydrogen Production from Gasification of Wood Sawdust
Dong, Lisha; Wu, Chunfei; Ling, Huajuan; Shi, Jeffrey; Williams, Paul T.; Huang, JunPublished 2017The production of renewable hydrogen-enriched gas from biomass waste is a promising technology for the development of a sustainable economy and society. Until now, there are still challenges of the technology in terms of ...Open AccessArticle -
Enhancing hydrogen production from the pyrolysis-gasification of biomass by size-confined Ni catalysts on acidic MCM-41 supports
Ye, Mengjing; Tao, Yongwen; Jin, Fangzhu; Ling, Huajuan; Wu, Chunfei; Williams, Paul T.; Huang, JunPublished 2018Hydrogen, currently produced from the reforming of fossil fuel resources, is a significant source for clean energy and the chemical industry. It is promising to develop a high-efficiency hydrogen production process from ...Open AccessArticle -
Hydrogenation of Acetophenone on Pd/Silica−Alumina Catalysts with Tunable Acidity: Mechanistic Insight by In Situ ATR-IR Spectroscopy
Chen, Mengmeng; Maeda, Nobutaka; Baiker, Alfons; Huang, JunPublished 2018Understanding the cooperative action of metal and acid sites of bifunctional catalysts is essential for developing more efficient catalysts for greener chemical processes. We used in situ ATR-IR spectroscopy in tandem with ...Open AccessArticle -
Identification of Vicinal Silanols and Promotion of Their Formation on MCM-41 via Ultrasonic Assisted One-Step Room-Temperature Synthesis for Beckmann Rearrangement
Wang, Zichun; Jiang, Yijiao; Zhang, Yunyao; Shi, Jeffrey; Stampfl, Catherine; Hunger, Michael; Huang, JunPublished 2018Siliceous mesoporous MCM-41 materials were synthesized under ultrasonic treatment from 0.5 to 3 h. The obtained U-[Si]MCM-41 catalysts were applied in the Beckmann rearrangement of cyclohexanone oxime (CHO) to ε-caprolactam ...Open AccessArticle -
Insight into Three‐Coordinate Aluminum Species on Ethanol‐to‐Olefin Conversion over ZSM‐5 Zeolites
Wang, Zichun; O'Dell, L. A.; Zeng, Xin; Liu, Can; Zhao,Shufang; Zhang, Wenwen; Gaborieau, Marianne; Jiang, Yijiao; Huang, JunPublished 2019Commercial bioethanol can be readily converted into ethylene by a dehydration process using solid acids, such as Brønsted acidic H‐ZSM‐5 zeolites, and thus, it is an ideal candidate to replace petroleum and coal for the ...Open AccessArticle -
Liquefaction and hydrodeoxygenation of polymeric lignin using a hier-archical Ni micro-reactor catalyst
Luo, Zhicheng; Kong, Jiechen; Ma, Bing; Wang, Zichun; Huang, Jun; Zhao, ChenPublished 2019The depolymerization of lignin into liquid products in high yields is particularly challenging because of the poor solid–solid contact during heterogeneous catalysis and the formation of benzylic carbocations (Ph-CαH-OH) ...Open AccessArticle -
Micro-structured ZSM-11 catalyst on stainless-steel microfibers for improving glycerol dehydration to acrolein
Ding, Jia; Wang, Lizhuo; Zhang, Zhiqiang; Zhao, Shufang; Zhao, Jinhui; Lu, Yong; Huang, JunPublished 2019Glycerol is a byproduct from the biodiesel manufacturing. Glycerol dehydration into more valuable acrolein is desirable and essential since it improves the economics of the biodiesel production and offers a sustainable ...Open AccessArticle -
Penta-Coordinated Aluminum Species: New Frontier for Tailoring Acidity-Enhanced Silica-Alumina Catalysts
Wang, Zichun; Jiang, Yijiao; Baiker, Alfons; Huang, JunPublished 2020Silica–alumina catalysts, including zeolites and amorphous silica–aluminas (ASAs), are among the most widely used solid acid catalysts and supports to produce petrochemicals, fine chemicals, and renewable energy. The ...Open AccessArticle -
Production and application of carbon nanotubes, as a co-product of hydrogen from the pyrolysis-catalytic reforming of waste plastic
Wu, Chunfei; Nahil, Mohamad A.; Miskolczi, Norbert; Huang, Jun; Williams, Paul T.Published 2016Hydrogen production from waste plastics is an important alternative for managing waste plastics. This work addresses a promising technology for co-producing high value carbon nanotubes (CNTs) in addition to the production ...Open AccessArticle
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