Hydrogen production in microreactor using porous SiC ceramic with a pore-in-pore hierarchical structure as catalyst support

Liao, Moyu; Guo, Chenxu; Guo, Wei‐Ming; Hu, Tianci; Qin, Hang; Gao, Pengzhao; Xiao, Huining

doi:10.1016/j.ijhydene.2020.05.244

Cited by 52 publications

(16 citation statements)

References 45 publications

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“…Porous CuO/ZnO/CeO 2 /ZrO 2 supported on porous SiC ceramic as a catalyst was also used to synthesize hydrogen, where 100 % methanol conversion was achieved at 280 °C, and the catalyst showed excellent performance stability by maintaining conversion of 95 % after 30 h of reaction [208]. A highly branched microreactor could enhance the methanol conversion performance, whereas Yao et al reported that the conversion increased by 10 % in a tree-shaped disc microreactor compared to a parallel microreactor [209].…”

Section: Synthesis Of Inorganic Materialsmentioning

confidence: 99%

Heterogeneous Microfluidic Reactors: A Review and an Insight of Enzymatic Reactions

2022

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Heterogeneous reactions are considered the heart of chemical synthesis with numerous industrial applications due to their high conversion rates and low reaction time. On the other hand, the performance of heterogeneous reactions suffers from several drawbacks such as lower product selectivity and high mass transfer resistance that, in many cases, reduce the reaction rate. The efficiency of various conventional mixing techniques in heterogeneous reactors is believed to play a critical role in controlling the product quality and mass transfer rates besides other essential factors. Microfluidics technology provides a unique opportunity to revisit many established heterogeneous reaction processes to optimize and understand the reaction mechanisms. The unique flow conditions in microflow systems provide an excellent platform for exploring the effect of high‐precision micromixing techniques on reaction rates and productivities. Recent advances in microreactor technology in general and specifically heterogeneous reactions in microflow systems with an insight on the enzymatic reactions in microreactors are reviewed.

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Section: Synthesis Of Inorganic Materialsmentioning

confidence: 99%

Heterogeneous Microfluidic Reactors: A Review and an Insight of Enzymatic Reactions

2022

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“…In recent years, porous silicon carbide (SiC)‐based geopolymer materials have attracted much attention. The characteristics of geopolymer materials are high strength, high temperature resistance, and chemical stability 1–4 . Geopolymers are generated by the reaction of aluminosilicate materials (metakaolin [MK], fly ash, waste glass, etc.)…”

Section: Introductionmentioning

confidence: 99%

“…Recently, several articles have shown the preparation of porous SiC‐based composite materials 1–4 . Lan et al prepared carbon nanotube‐derived binary porous SiC with multiple interfaces that were successfully fabricated by structuring SiC nanowire networks in a porous SiC skeleton 1 .…”

Section: Introductionmentioning

confidence: 99%

“…Lan et al prepared carbon nanotube‐derived binary porous SiC with multiple interfaces that were successfully fabricated by structuring SiC nanowire networks in a porous SiC skeleton 1 . Liao et al fabricated a porous SiC ceramic as a catalyst support for a porous CuO/ZnO/CeO 2 /ZrO 2 catalyst via a solution combustion method and used the ceramic in a microreactor 2 . The results showed that the microreactor achieved a 100% methanol conversion rate at 280°C, and the conversion rate remained at approximately 95% after 30 h of reaction 2 .…”

Section: Introductionmentioning

confidence: 99%

“…Liao et al fabricated a porous SiC ceramic as a catalyst support for a porous CuO/ZnO/CeO 2 /ZrO 2 catalyst via a solution combustion method and used the ceramic in a microreactor 2 . The results showed that the microreactor achieved a 100% methanol conversion rate at 280°C, and the conversion rate remained at approximately 95% after 30 h of reaction 2 . Malik et al prepared newly developed porous SiC‐33 wt % SiO 2 composites with very low thermal conductivity (0.047 W/mK, 72.4% porous) 3 .…”

Section: Introductionmentioning

confidence: 99%

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This study used silicon carbide sludge (SCS) and waste glass fiber (WGF) to prepare SCS/WGF porous (SWP) eco‐fireproof materials by a hydrogen peroxide foaming agent. The results showed that the compressive strength of samples that were cured for 1 day and had an SCS replacement level of 10% and added amounts of WGF of 0.5% and 2.0% were 0.32 and 0.46 MPa, respectively. Additionally, it was observed that the stress–strain curves were relatively extended. WGF could improve the geopolymeric matrix of the composites in terms of formation and/or redistribution of cracks by bridging cracks and perforations within the matrix. When the added amounts of WGF were 0.5% and 2.0%, the reverse‐side temperatures of the samples were 238 and 262°C, respectively, which showed that adding an appropriate amount of WGF could effectively reduce the reverse‐side temperature of SWP eco‐fireproof materials. The results displayed the beneficial influence of SCS and WGF in improving bulking density, compressive strength, and flexural strength and in reducing porosity and thermal conductivity. Therefore, the results showed that SWP eco‐fireproof materials reinforced using SCS and WGF have potential as building materials.

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Ceramic Open Cell Foams Featuring Plasmonic Hybrid Metal Nanoparticles for In Situ SERS Monitoring of Catalytic Reactions

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This work presents porous zirconia‐toughened alumina ceramics functionalized with Au@Pd/Au@Pt core–shell nanoparticle (NP) for in situ monitoring of catalytic reactions via surface‐enhanced Raman scattering (SERS) which is augmented by the open cell foam structure of the ceramic support. In this respect, the porous ceramic enables efficient light trapping and propagation onto the coated surface, which provides good accessibility of the catalyst, while the core–shell particles are equipped with a catalytically active shell and a plasmonic core which enables SERS sensing. The metallic hybrid core–shell NPs are synthesized by the Au‐seed mediated method and colloidally deposited onto the open porous ceramic matrix prepared via the polymer replica method. The Au@Pt NP functionalized porous ceramic show a Raman enhancement factor up to 106, which is significantly higher than that of non‐porous samples. In situ reaction monitoring via SERS is demonstrated by the Pt‐catalyzed reduction of 4‐nitrothiophenol to 4‐aminothiophenol, showing high specificity for analysis of reactants and products. This multifunctional material concept featuring ceramics‐augmented SERS and catalytic activity could be extended beyond real‐time, sensitive reaction monitoring toward high temperature reactions, photothermal catalysis, bioprocessing and ‐sensing, green energy conversion, and related applications.

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Hydrogen production in microreactor using porous SiC ceramic with a pore-in-pore hierarchical structure as catalyst support

Cited by 52 publications

References 45 publications

Heterogeneous Microfluidic Reactors: A Review and an Insight of Enzymatic Reactions

Heterogeneous Microfluidic Reactors: A Review and an Insight of Enzymatic Reactions

Elucidating the effects of silicon carbide sludge and waste glass fiber on the characteristics of porous eco‐fireproof materials

Ceramic Open Cell Foams Featuring Plasmonic Hybrid Metal Nanoparticles for In Situ SERS Monitoring of Catalytic Reactions

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