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Folkard AL, Farahani MD, Mahomed AS, Friedrich HB. Sustainable selective propanol production via continuous flow conversion of glycerol over synergistic bifunctional catalysts: An exploration into factors affecting activity. ChemCatChem 2022. [DOI: 10.1002/cctc.202200602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Iqbal Z, Sadiq S, Sadiq M, Khan I, Saeed K. Effect of Microwave Irradiation on the Catalytic Activity of Tetragonal Zirconia: Selective Hydrogenation of Aldehyde. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2022. [DOI: 10.1007/s13369-021-05712-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Naicker L, Valand J, Govender A, Xaba BM, Friedrich HB. Impact of the impregnation sequence on the surface characteristics on Cu-Ag supported on γ-Alumina towards the liquid phase competitive hydrogenation of octanal in the presence of octene. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Xia D, Mannering J, Li Q, Massey AF, Kulak AN, Li H, Menzel R, Huang P. Facile Synthesis of Electrically Conductive and Heatable Nanoparticle/Nanocarbon Hybrid Aerogels. ACS APPLIED MATERIALS & INTERFACES 2021; 13:36201-36212. [PMID: 34291894 DOI: 10.1021/acsami.1c10428] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Joule heating studies on nanoparticle/nanocarbon hybrid aerogels have been reported, but systematic investigations on hydrotalcite-derived catalysts supported onto reduced graphene oxide (rGO) aerogels are rare. In this study, hydrotalcite-derived Cu-Al2O3 nanoparticles were incorporated into a porous and multifunctional rGO aerogel support for fabricating electrically conducting Cu-Al2O3/rGO hybrid aerogels, and their properties were investigated in detail. The hybridization of Cu-Al2O3 with a 3D nanocarbon support network imparts additional functionalities to the widely used functional inorganic nanoparticles, such as direct electrical framework heating and easy regeneration and separation of spent nanoparticles, with well-spaced nanoparticle segregation. 3D variable-range hopping model fitting confirmed that electrons were able to reach the entire aerogel to enable uniform resistive heating. The conductivity of the nanocarbon support framework facilitates uniform and fast heating (up to 636 K/min) of the embedded nanoparticles at very low energy consumption, while the large porosity and high thermal conductivity enable efficient heat dissipation during natural cooling (up to 336 K/min). The thermal stability of the hybrid aerogel was demonstrated by repeated heating/cooling cycling at different temperatures that were relevant to important industrial applications. The facile synthetic approach can be easily adapted to fabricate other types of multifunctional nanoparticle/nanocarbon hybrid aerogels, such as the MgAl-MMO/rGO aerogel and the Ni-Al2O3/rGO aerogel. These findings open up new routes to the functionalization of inorganic nanoparticles and extend their application ranges that involve electrical/thermal heating, temperature-dependent catalysis, sorption, and sensing.
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Affiliation(s)
- Dong Xia
- School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
| | - Jamie Mannering
- School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
| | - Qun Li
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | | | | | - Heng Li
- Key Laboratory of Estuarine Ecological Security and Environmental Health, Tan Kah Kee College, Xiamen University, 363105 Zhangzhou, China
| | - Robert Menzel
- School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
| | - Peng Huang
- Department of Materials, University of Manchester, Manchester M13 9PL, U.K
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Yılmaz F, Hür D. Continuous flow hydrogenation with Pd complexes of pyridine‐benzotriazole ligands. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6389] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Filiz Yılmaz
- Faculty of Science Department of Chemistry, Yunusemre Campus Eskisehir Technical University Eskisehir Turkey
| | - Deniz Hür
- Faculty of Science Department of Chemistry, Yunusemre Campus Eskisehir Technical University Eskisehir Turkey
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Yu T, Jiao J, Song P, Nie W, Yi C, Zhang Q, Li P. Recent Progress in Continuous-Flow Hydrogenation. CHEMSUSCHEM 2020; 13:2876-2893. [PMID: 32301233 DOI: 10.1002/cssc.202000778] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Indexed: 06/11/2023]
Abstract
To achieve a safe, efficient, and sustainable (even fully automated) production for the continuous-flow hydrogenation reactions, which is among the most often used reactions in chemical synthesis, new catalyst types and immobilization methods as well as flow reactors and technologies have been developed over the last years; in addition, these approaches have been combined with new and transformational technologies in other fields such as artificial intelligence. Thus, attention from academic and industry practitioners has increasingly focused on improving the performance of hydrogenation in flow mode by reducing the reaction times, increasing selectivities, and achieve safe operation. This Minireview aims to summarize the most recent research results on this topic with focus on the advantages, current limitations, and future directions of flow chemistry.
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Affiliation(s)
- Tao Yu
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University, Xi'an, 710049, P.R. China
| | - Jiao Jiao
- Departement of Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, 710061, P. R. China
- Xian Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Peidong Song
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University, Xi'an, 710049, P.R. China
| | - Wenzheng Nie
- Departement of Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, 710061, P. R. China
| | - Chunhai Yi
- Shaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Qian Zhang
- Department of Applied Chemistry, Xi'an University of Technology, Xi'an, 710048, P. R. China
| | - Pengfei Li
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University, Xi'an, 710049, P.R. China
- Xian Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
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Chetty T, Dasireddy VDBC, Friedrich HB. The Continuous Flow Ag/γ-Al2O3 Catalysed Preferential Hydrogenation of Octanal in an Octanal/Octene Mixture. Catal Letters 2019. [DOI: 10.1007/s10562-019-02812-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
Copper oxide supported on alumina and copper chromite were synthesized, characterized, and subsequently tested for their catalytic activity toward the hydrogenation of octanal. Thereafter, the impact of water addition on the conversion and selectivity of the catalysts were investigated. The fresh catalysts were characterized using X-ray diffraction (XRD), BET surface area and pore volume, SEM, TEM, TGA-DSC, ICP, TPR, and TPD. An initial catalytic testing study was carried out using the catalysts to optimize the temperature and the hydrogen-to-aldehyde ratio—which were found to be 160 °C and 2, respectively—to obtain the best conversion and selectivity to octanol prior to water addition. Water impact studies were carried out under the same conditions. The copper chromite catalyst showed no deactivation or change in octanol selectivity when water was added to the feed. The alumina-supported catalyst showed no change in conversion, but the octanol selectivity improved marginally when water was added.
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