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Gas phase hydrogenation of levulinic acid to γ .

Gas phase hydrogenation of levulinic acid to γ .

Jan 27, 2016 · Catalysis procedure Catalytic tests were performed at atmospheric pressure in a glass down-flow fixed-bed reactor (14 mm inner diameter, 200 mm long) loaded with 1 g of catalysts mixed with 1 g of quartz beads. Before the catalytic performance, the catalysts were reduced at 500 1C online for 4 h in H2 flow (30 ml minÀ1).

Determination of the Evolution of Heterogeneous Single .

Determination of the Evolution of Heterogeneous Single .

Figure 6. Catalytic performance of Pt/Al 2 O 3 catalysts for hydrogenation reactions. (a) Hydrogenation of 3-nitrostyrene with various Pt/Al 2 O 3 catalysts. Reaction conditions: 0.5 mmol of 3-nitrostyrene, 2 mL of toluene as the solvent, 20 mg of solid catalyst.

Final Report Summary - BIOGO-FOR-PRODUCTION (Catalytic .

Final Report Summary - BIOGO-FOR-PRODUCTION (Catalytic .

Dec 01, 2013 · In addition, also reactors for the investigation of alternative routes had to be developed and realised, e.g. for the direct upgrading of bio oil into higher alcohols (Fig. 13). Fig. 13 Two-stage reactor for the hydrogenation of bio oil. Fig. 14 Microstructured test device for contacting pyrolysis oil and steam in laboratory scale.

Investigation of coupling dehydrogenation and .

Investigation of coupling dehydrogenation and .

Investigation of coupling dehydrogenation and hydrogenation reactions in a fixed bed catalytic reactor with well-mixed catalyst pattern M.E.E. Abashar * Chemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia Received 30 November 2010; accepted 10 March 2011 Available online 14 .

Coupling of ethylbenzene dehydrogenation and benzene .

Coupling of ethylbenzene dehydrogenation and benzene .

Fig. 1. Schematic representation of the fixed bed catalytic reactor with well-mixed catalysts. of the fixed bed reactor that contains a well-mixed catalyst pattern is shown in Fig. 1. The following assumptions are made in the model development: 1. The reactor operates at isothermal steady state conditions [6]. 2. The ideal gas law is obeyed. 3.

(PDF) Investigation of coupling dehydrogenation and .

(PDF) Investigation of coupling dehydrogenation and .

Investigation of coupling dehydrogenation and hydrogenation reactions in a fixed bed catalytic reactor with well-mixed catalyst pattern Article (PDF Available) in Journal of Saudi Chemical Society .

US4428922A - Process for manufacturing hydrogen peroxide .

US4428922A - Process for manufacturing hydrogen peroxide .

In the anthraquinone process for manufacturing hydrogen peroxide an improvement is obtained in the productivity of a fixed-bed catalytic hydrogenator operating in the dispersed-bubble flow regime by premixing the hydrogen gas and the working solution by means of a static mixer.

Mechanistic understanding of Cu-based bimetallic catalysts .

Mechanistic understanding of Cu-based bimetallic catalysts .

Mar 25, 2020 · Copper has received extensive attention in the field of catalysis due to its rich natural reserves, low cost, and superior catalytic performance. Herein, we reviewed two modification mechanisms of co-catalyst on the coordination environment change of Cu-based catalysts: (1) change the electronic orbitals and geometric structure of Cu without any catalytic functions; (2) act as an .

Freezing copper as a noble metal–like catalyst for .

Freezing copper as a noble metal–like catalyst for .

The catalytic performance in DMO hydrogenation was conducted with a fixed-bed reactor. Briefly, 0.5 g of the catalyst (20 to 40 meshes) was packed into a stainless-steel tubular reactor with the thermocouple inserted into the catalyst bed. Catalyst reduction was performed at 250°C for 4 hours with a ramping rate of 2°C min −1 from room .

Saeed Sahebdelfar's research works | Petrochemical .

Saeed Sahebdelfar's research works | Petrochemical .

Saeed Sahebdelfar's 75 research works with 1,113 citations and 11,564 reads, including: Heterogeneous Catalytic Hydrogenation of CO2 to Basic Chemicals and Fuels

Coupling of ethylbenzene dehydrogenation and benzene .

Coupling of ethylbenzene dehydrogenation and benzene .

The application of dual-functionality via a well-mixed catalyst pattern in an integrated fixed bed catalytic reactor for simultaneous production of styrene and cyclohexane has been investigated. A.

US4428922A - Process for manufacturing hydrogen peroxide .

US4428922A - Process for manufacturing hydrogen peroxide .

In the anthraquinone process for manufacturing hydrogen peroxide an improvement is obtained in the productivity of a fixed-bed catalytic hydrogenator operating in the dispersed-bubble flow regime by premixing the hydrogen gas and the working solution by means of a static mixer.

Mechanistic understanding of Cu-based bimetallic catalysts .

Mechanistic understanding of Cu-based bimetallic catalysts .

Mar 25, 2020 · Gesmanee S, Koo-Amornpattana W. Catalytic hydrogenation of CO 2 for methanol production in fixed-bed reactor using Cu–Zn supported on γ-Al 2 O 3. In: 2017 International Conference on Alternative Energy in Developing Countries and Emerging Economies, 2017, 138: 739–744. CAS Google Scholar

Investigation of coupling dehydrogenation and . - CORE

Investigation of coupling dehydrogenation and . - CORE

Investigation of coupling dehydrogenation and hydrogenation reactions in a fixed bed catalytic reactor with well-mixed catalyst pattern By M.E.E. Abashar Download PDF (877 KB)

Modeling and simulation of an integrated multi-shell fixed .

Modeling and simulation of an integrated multi-shell fixed .

Sep 01, 2011 · Single-shell fixed bed catalytic membrane reactor with well-mixed catalyst pattern In order to make fair evaluation to the effect of coupling reactions and the membrane, each effect is tested separately and afterwards the combined effect is tested.

Determination of the Evolution of Heterogeneous Single .

Determination of the Evolution of Heterogeneous Single .

Figure 6. Catalytic performance of Pt/Al 2 O 3 catalysts for hydrogenation reactions. (a) Hydrogenation of 3-nitrostyrene with various Pt/Al 2 O 3 catalysts. Reaction conditions: 0.5 mmol of 3-nitrostyrene, 2 mL of toluene as the solvent, 20 mg of solid catalyst, 50 °C and 3 bar of H 2.

9 Reaction Engineering Concepts for the Catalytic .

9 Reaction Engineering Concepts for the Catalytic .

In its simplest form, a catalytic flow reactor consists of a tube packed with catalyst pellets. This configuration, termed a packed bed or fixed bed reactor, requires the catalyst pellets to be immobilized in the tube by mesh screens, glass beads, or some other sort of mechanical device. Catalyst particles can also be fixed to the walls of a .

Highly active Cu/MgO catalysts for selective .

Highly active Cu/MgO catalysts for selective .

Using commercially available potassium standards (10 ppm) catalyst samples were analyzed. Catalytic activity tests The catalytic experiments are carried out in a fixed bed reactor (14 mm id and 400 mm length) at atmospheric pressure under N 2 flow. About 1 g of the catalyst is loaded and reduced in H 2 flow at 553 K for 3 h.

Sorption‐enhanced reaction process - Carvill - 1996 .

Sorption‐enhanced reaction process - Carvill - 1996 .

It uses a fixed packed column of an admixture of a catalyst and a sorbent that selectively removes a reaction by‐product from the reaction zone. The sorbent is periodically regenerated by using the principles of pressure‐swing adsorption. The process steps allow direct production of the desired product at high purity and at the reaction .

Mn–Fe nanoparticles on a reduced graphene oxide catalyst .

Mn–Fe nanoparticles on a reduced graphene oxide catalyst .

These catalysts were used in an FTS slurry bed reactor (SBR) to test their performance against that of a Mn-free Fe/rGO catalyst. Then the promotional effect of Mn was investigated in detail based on the catalytic performance as well as characterization results.

Highly Selective Conversion of Carbon Dioxide to Aromatics .

Highly Selective Conversion of Carbon Dioxide to Aromatics .

Hydrogenation of CO2 to aromatics with selectivity of 73% among hydrocarbons at a single-pass conversion of 14% is achieved over a tandem catalyst. A thermodynamic coupling between CO2 hydrogenation and aromatics formation was effectively conducted through the intermediate CHxO species. It was found that the presence of H2O and CO2 not only facilitates aromatics production but .

Investigation of coupling dehydrogenation and .

Investigation of coupling dehydrogenation and .

Apr 01, 2013 · The fixed bed catalytic reactor with well-mixed catalysts pattern configuration is loaded with two distinct discrete types of pellets that are physical well mixed as shown in Fig. 1. The data used for this simulation study is shown in Table 1. Table 1. Data for the simulation.

Comparison of single-bed oxidative dehydrogenation of .

Comparison of single-bed oxidative dehydrogenation of .

Apparatus and procedure. Catalytic reaction of dehydrogenation of EB using CO 2 was carried out in a fixed bed quartz reactor. The single-bed reactor for ODH of EB contained only 2 g of 5F/NCS loaded between quartz beds and double-bed reactor for dehydrogenation and oxidation consisted of 2 g of 5F/NCS followed by 2 g of oxidation catalyst supported by quartz .

Propane oxidative dehydrogenation over highly selective .

Propane oxidative dehydrogenation over highly selective .

Hexagonal boron nitride ( h -BN) catalyst has recently been reported to be highly selective in oxidative dehydrogenation of propane (ODHP) for olefin production. In addition to propene, ethylene also forms with much higher overall selectivities to C2-products than to C1-products. In this work, we report that the reaction pathways over the h -BN catalyst are different from the V-based catalysts .

Directly converting carbon dioxide to linear α-olefins on .

Directly converting carbon dioxide to linear α-olefins on .

Mar 22, 2018 · Briefly, CO 2 hydrogenation reaction was performed with a continuous flowing fixed-bed reactor from feed gas (CO 2: 24 v%, H 2: 72 v%, N 2: 4 v%). An ice trap of n-octane as solvent was equipped .

Operando DRIFTS and DFT Study of Propane Dehydrogenation .

Operando DRIFTS and DFT Study of Propane Dehydrogenation .

Catalytic dehydrogenation is a highly endothermic reaction, and at elevated temperatures side reactions such as cracking, hydrogenolysis, and isomerization are likely to occur. (3) The formation of byproducts and the resulting coke deposits leads to a decrease in catalyst selectivity and rapid catalyst deactivation.

9 Reaction Engineering Concepts for the Catalytic .

9 Reaction Engineering Concepts for the Catalytic .

In its simplest form, a catalytic flow reactor consists of a tube packed with catalyst pellets. This configuration, termed a packed bed or fixed bed reactor, requires the catalyst pellets to be immobilized in the tube by mesh screens, glass beads, or some other sort of mechanical device. Catalyst particles can also be fixed to the walls of a .

Maximizing the catalytic function of hydrogen spillover in .

Maximizing the catalytic function of hydrogen spillover in .

Feb 25, 2014 · The reaction conditions are as follows: benzene hydrogenation (523 K, 473 kPa H 2, and 27 kPa benzene); cyclohexane dehydrogenation (623 K, 94.3 kPa H 2, and 5.7 kPa cyclohexane); propane .

Inductive Heating Assisted-Catalytic Dehydrogenation of .

Inductive Heating Assisted-Catalytic Dehydrogenation of .

Nov 23, 2019 · Tetralin dehydrogenation as a hydrogen source for underground catalytic upgrading of heavy oil was studied in a fixed-bed reactor that mimics the catalyst packing around the horizontal production well (CAPRI) of the THAI process under induction heating at 300-380 °C, 18 bar, 0.75 h −1 and 70% (v/v) CTSBR using NiMo/Al 2 O 3 catalyst. The .

Investigation of coupling dehydrogenation and . - CORE

Investigation of coupling dehydrogenation and . - CORE

Investigation of coupling dehydrogenation and hydrogenation reactions in a fixed bed catalytic reactor with well-mixed catalyst pattern By M.E.E. Abashar Download PDF (877 KB)