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Sulfonated reduced graphene oxide catalyzed cyclization of .

Sulfonated reduced graphene oxide catalyzed cyclization of .

Jul 05, 2017 · The reaction mass was later checked by thin layer chromatography (TLC). The achieved reaction crude was cooled to the room temperature. Then, the catalyst was separated out via the filtration and .

Photocatalysis - Wikipedia

Photocatalysis - Wikipedia

In chemistry, photocatalysis is the acceleration of a photoreaction in the presence of a catalyst.In catalysed photolysis, light is absorbed by an adsorbed substrate. In photogenerated catalysis, the photocatalytic activity (PCA) depends on the ability of the catalyst to create electron–hole pairs, which generate free radicals (e.g. hydroxyl radicals: •OH) able to undergo secondary reactions.

Photocatalysis - Wikipedia

Photocatalysis - Wikipedia

In chemistry, photocatalysis is the acceleration of a photoreaction in the presence of a catalyst.In catalysed photolysis, light is absorbed by an adsorbed substrate. In photogenerated catalysis, the photocatalytic activity (PCA) depends on the ability of the catalyst to create electron–hole pairs, which generate free radicals (e.g. hydroxyl radicals: •OH) able to undergo secondary reactions.

The Use of Molecular Oxygen for Liquid Phase Aerobic .

The Use of Molecular Oxygen for Liquid Phase Aerobic .

Dec 11, 2018 · The reaction mixture is rotated at very high speeds (up to 9000 rpm) to produce the liquid phase as a thin film, thus providing a large surface area between the liquid and gas phases. The reactor system was demonstrated on the aerobic oxidation of thiols to disulfides [ 135 ].

Highly Enhanced Phenol Hydroxylation in [h0h]‐Oriented Fe .

Highly Enhanced Phenol Hydroxylation in [h0h]‐Oriented Fe .

As for the oxyfunctionalization of n‐hexane using H 2 O 2 as the oxidant, the reaction rate catalyzed by the b‐oriented TS‐1 membrane in the interphase membrane reactor was much smaller than that catalyzed by TS‐1 crystal grains in the traditional slurry reactor 9, 10, 31 due to the limiting permeation rate of the n‐hexane vapor at .

Membranes | July 2020 - Browse Articles

Membranes | July 2020 - Browse Articles

Membranes, an international, peer-reviewed Open Access journal. In this novel conceptual fuel cell vehicle (FCV), an on-board CH 4 steam reforming (MSR) membrane reformer (MR) is considered to generate pure H 2 for supplying a Fuel Cell (FC) system, as an alternative to the conventional automobile engines. Two on-board tanks are forecast to store CH 4 and water, useful for feeding both a .

Membrane Reactors | Request PDF

Membrane Reactors | Request PDF

In this work, we develop and demonstrate a scalable, sustainable, and safe thin-layer membrane reactor for heterogeneous Pd-catalyzed hydrogenations and .

membrane reactor SI revision - Royal Society of Chemistry

membrane reactor SI revision - Royal Society of Chemistry

Scalable Thin-Layer Membrane Reactor for Heterogeneous and Homogenous Catalytic Gas-Liquid Reactions Yiming Mo,† Joseph Imbrogno,† Haomiao Zhang and Klavs F. Jensen* Department of Chemical Engineering, Massachusetts Institute of Technology Cambridge, MA .

(PDF) Development of a Novel Catalytic Membrane Reactor .

(PDF) Development of a Novel Catalytic Membrane Reactor .

Development of a Novel Catalytic Membrane Reactor for Heterogeneous Catalysis in Supercritical CO2.pdf . J.T.F. Membrane reactor for homogeneous ca . related to the unique gas-liquid-solid .

The Continuous‐Flow Synthesis of Carboxylic Acids using .

The Continuous‐Flow Synthesis of Carboxylic Acids using .

Dec 22, 2010 · Yiming Mo, Joseph Imbrogno, Haomiao Zhang, Klavs F. Jensen, Scalable thin-layer membrane reactor for heterogeneous and homogeneous catalytic gas–liquid reactions, Green Chemistry, 10.1039/C8GC01917G, 20, 16, (3867-3874), (2018).

Catalytic Palladium-Based and Iron-Based Membrane Reactors .

Catalytic Palladium-Based and Iron-Based Membrane Reactors .

Catalytic Palladium-Based and Iron-Based Membrane Reactors: Novel Strategies of Synthesis Veronica Pinos-Vé ́lez, †,‡ Carla di Luca,†§ Dana G. Crivoi,†,∥⊥ Francisco Medina,† and Anton Dafinov*,†,∥ †Departament d'Enginyeria Química, Universitat Rovira i Virgili, Av. Països Catalans, 26, Campus Sescelades, Tarragona 43007, .

Aqueous phase hydrogenation of levulinic acid using a .

Aqueous phase hydrogenation of levulinic acid using a .

Jun 15, 2016 · There are some examples of hydrogenation reactions in membrane reactors in the literature on a variety of reactions, but most notable are the differences in the location of the catalyst particles and the intended transport of the substrate for hydrogenation, as shown in Fig. 1.The methods of substrate transport include: (A) diffusion in the dense membrane layer, (B) convective flow through .

Structuring catalyst and reactor – an inviting avenue to .

Structuring catalyst and reactor – an inviting avenue to .

Dec 11, 2014 · D Membrane reactors redefined Reaction­separation combinations in catalytic membrane reactors,111,112 a much studied topic in structured reactors,4 is generally limited to systems on a reactor scale, where a catalytic bed or layer is enclosed by a catalytic or non-catalytic membrane housing.

Scalable thin-layer membrane reactor for heterogeneous and .

Scalable thin-layer membrane reactor for heterogeneous and .

Here, we present a scalable, sustainable, and safe thin-layer membrane reactor for heterogeneous and homogenous catalytic gas–liquid reactions. The reactor uses a Teflon AF membrane sandwiched between two sheets of thin-layer carbon cloth, which enables superior gas–liquid mass transfer performance. The carbon cloth layer works as a .

Structuring catalyst and reactor – an inviting avenue to .

Structuring catalyst and reactor – an inviting avenue to .

Dec 11, 2014 · D Membrane reactors redefined Reaction­separation combinations in catalytic membrane reactors,111,112 a much studied topic in structured reactors,4 is generally limited to systems on a reactor scale, where a catalytic bed or layer is enclosed by a catalytic or non-catalytic membrane housing.

Unlocking the potential of supported liquid phase .

Unlocking the potential of supported liquid phase .

Dec 28, 2015 · During the reaction, high-boiling aldol-condensation side products filled the pores of the support acting as a solvent for the homogeneous catalyst as revealed by the analysis of the spent catalyst. The catalyst system based on the diphosphite ligand led to a conversion of 1-butene ranging from 47.3% to 41.5% corresponding to a TOF of 751 to .

Titanium Dioxide as a Catalyst Support in Heterogeneous .

Titanium Dioxide as a Catalyst Support in Heterogeneous .

The lack of stability is a challenge for most heterogeneous catalysts. During operations, the agglomeration of particles may block the active sites of the catalyst, which is believed to contribute to its instability. Recently, titanium oxide (TiO 2 ) was introduced as an alternative support material for heterogeneous catalyst due to the effect of its high surface area stabilizing the catalysts .

Flow Photochemistry: Shine Some Light on Those Tubes .

Flow Photochemistry: Shine Some Light on Those Tubes .

]) comprising two concentric tubes filled respectively with liquid solution and gas and separated by a gas-permeable membrane. The gas permeates the membrane and diffuses homogeneously into the liquid (Figure 2B). This reactor has been used primarily for thermal reactions, or as a method to presaturate a solution with gas prior to a .

PTFE-Membrane Flow Reactor for Aerobic Oxidation Reactions .

PTFE-Membrane Flow Reactor for Aerobic Oxidation Reactions .

Scalable thin-layer membrane reactor for heterogeneous and homogeneous catalytic gas–liquid reactions. Green Chemistry 2018, 20 DOI: 10.1039/C8GC01917G. Anna Hoschek, Bruno Bühler, Andreas Schmid. Overcoming the Gas-Liquid Mass Transfer of Oxygen by Coupling Photosynthetic Water Oxidation with Biocatalytic Oxyfunctionalization.

Scalable thin-layer membrane reactor for heterogeneous and .

Scalable thin-layer membrane reactor for heterogeneous and .

Scalable thin-layer membrane reactor for heterogeneous and homogeneous catalytic gas-liquid reactions Article (PDF Available) in Green Chemistry 20(16) · July 2018 with 106 Reads

Micromachined reactors for catalytic partial oxidation .

Micromachined reactors for catalytic partial oxidation .

The potential application of this reactor to partial‐oxidation reactions is explored by using Pt‐catalyzed NH 3 oxidation as a model reaction. Investigation of reactor behavior as a function of operating conditions shows that conversion and selectivity behavior of conventional laboratory reactors can be reproduced and demonstrates the .

Flow-through catalytic membrane reactors—Principles and .

Flow-through catalytic membrane reactors—Principles and .

Jan 01, 2009 · 1. Introduction. Catalytic membranes without separative function have successfully been applied as microstructured reactors .If the reactant mixture is forced to flow through the pores of a membrane which have been impregnated with catalyst, the intensive contact allows for high catalytic activity with negligible mass transport resistances .Several review articles mention this topic as a .

Photo-catalytic membrane reactors for the remediation of .

Photo-catalytic membrane reactors for the remediation of .

Jan 02, 2020 · 3. Catalytic membrane reactors. A catalytic membrane reactor (CMR) is an integrative unit in which process of separation by membranes and catalytic reactions are coupled in parallel, . CMRs selectively allow the passage of specific components from the feed relying of the principle of surface reactivity which facilitates chains of chemical .

Heterogeneous and homogenous catalysts for hydrogen .

Heterogeneous and homogenous catalysts for hydrogen .

The highest performing heterogeneous catalyst for sodium borohydride hydrolysis was reported by Ozkar et al. 55, who achieved a maximum hydrogen generation rate of 96,800 mL min −1 (g catalyst) −1 using water dispersible ruthenium(0) nanoclusters at ambient temperatures. However, due to the scarcity and expense of noble metal catalysts such .

Scalable thin-layer membrane reactor for heterogeneous and .

Scalable thin-layer membrane reactor for heterogeneous and .

rsc.li/greenchem Scalable thin-layer membrane reactor for heterogeneous and homogeneous catalytic gas–liquid reactions† Yiming Mo, ‡ Joseph Imbrogno, ‡ Haomiao Zhang and Klavs F. Jensen * Catalytic gas–liquid reactions have potential as environmentally benign methods for organic synthesis, particularly hydrogenation and oxidation .

A Scalable Preparation Method for SILP and SCILL Ionic .

A Scalable Preparation Method for SILP and SCILL Ionic .

Oct 26, 2012 · Similarly, the so‐called supported catalysts with ionic liquid layer (SCILL) consist of an ionic liquid layer on top of a traditional heterogeneous catalyst, which can be prepared in a similar way. In this work, a novel preparation method for SILP catalysts is presented that is scalable for larger batches, as required for industrial use.

Metal Catalysts for Heterogeneous Catalysis: From Single .

Metal Catalysts for Heterogeneous Catalysis: From Single .

May 23, 2018 · The concept of [email protected] 2 catalyst has further been applied for nonoxidative activation of CH 4 in hydrogen-permeable tubular membrane reactor. 145 By adding H 2 in the feed gas into the membrane reactor, 30% conversion of CH 4 and 99% selectivity to C2 products (acetylene and ethylene) can be achieved with good stability at 1303 K.

Continuous Processing of Multiphase Reactions for .

Continuous Processing of Multiphase Reactions for .

reaction kinetics. To alleviate tedious scale-up procedure and safety concerns of catalytic gas-liquid reactions, we have provided a robust design of a thin-layer membrane reactor to safely and scalably perform catalytic heterogeneous hydrogenation and homogeneous aerobic oxidation,

Simon Kuhn – Process Engineering for Sustainable Systems .

Simon Kuhn – Process Engineering for Sustainable Systems .

The microchannel reactor employed a mesh-supported Teflon AF-2400 membrane, with gas and liquid channels on each side. Catalyst particles were packed in the liquid flow channel. Operation with 20 bara pressure difference between the gas and the liquid .

Continuous Processing of Multiphase Reactions for .

Continuous Processing of Multiphase Reactions for .

reaction kinetics. To alleviate tedious scale-up procedure and safety concerns of catalytic gas-liquid reactions, we have provided a robust design of a thin-layer membrane reactor to safely and scalably perform catalytic heterogeneous hydrogenation and homogeneous aerobic oxidation,