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Comparative study of fluidized-bed and fixed-bed reactor .

Comparative study of fluidized-bed and fixed-bed reactor .

2013-9-1 · In this work, syngas methanation over Ni-W/TiO 2-SiO 2 catalyst was studied in a fluidized-bed reactor (FBR) and its performance was compared with a fixed-bed reactor (FIXBR). The effects of main operating variables including feedstock gases space velocity, coke content, bed temperature and sulfur-tolerant stability of 100 h life were investigated.

Frontiers | A Cost Estimation for CO2 Reduction and Reuse .

Frontiers | A Cost Estimation for CO2 Reduction and Reuse .

The Swiss government has signed the Paris Climate Agreement and various measures need to be implemented in order to reach the target of a 50% reduction in CO2 emissions in Switzerland by 2030 compared with the value for 1990. Considering the fact that the production of cement in Switzerland accounts around 2.5 million ton for CO2 emissions of which corresponds to roughly 7% of the .

PERFORMANCE COMPARISON OF SYNGAS .

PERFORMANCE COMPARISON OF SYNGAS .

2018-4-18 · methanation performance on fluidized and fixed bed reactors showed that, the highest 62.9 vol% CH 4 in the distribution of product gas was obtained on fluidized bed reactor, while only 46.5 vol% CH 4 was observed on fixed bed reactor. And the decrease of the percentage composition in the volume of CH 4 was more obvious on fixed bed reactor.

CFD-DEM SIMULATION OF SYNGAS-TO-METHANE .

CFD-DEM SIMULATION OF SYNGAS-TO-METHANE .

2018-4-18 · the type of fixed bed. In comparison with the fixed-bed reactor, the fluidized-bed reactor is better suited for the syngas-to-methane process because of its excellent heat removal capability (5). In principle, the fluidized-bed reactor should be superior to the fixed-bed reactor in the reactor performances, e.g., catalyst operating life

A Study of CO2 Methanation over Ni-Based Catalysts .

A Study of CO2 Methanation over Ni-Based Catalysts .

Temperature-programmed reduction (H 2-TPR) experiments were carried out in a fixed-bed reactor. 100 mg sample was loaded in the middle of the reactor tube. The temperature of the reactor was raised from 100°C to 800°C at a heating rate of 10°C/min under 5% H 2 /95% N 2 with a flow rate of 30 mL/min.

REVIEW Open Access Methanation of CO - storage of .

REVIEW Open Access Methanation of CO - storage of .

2017-8-25 · both the suited catalysts, which are primarily designed for CO methanation, and the optimum operation condi-tions for the methane synthesis step for CO 2 in a fixed bed adiabatic reactor. This data cannot be found in the literature. The second part then addresses the scaling-up of the methanation process from the lab-scale to an industrial scale.

Integration study for alternative methanation .

Integration study for alternative methanation .

2012-10-9 · recently published by Kopyscinski et al. (2010). Methanation is either carried out in a series of adiabatic fixed bed reactors with inter-cooling and optional product recycle (e.g. TREMP or Lurgi methanation), or in a single fluidised bed reactor at isothermal conditions (e.g. COMFLUX methanation). Commonly used catalysts are Ni-based.

Parametric Study of CO2 Methanation for Synthetic Natural .

Parametric Study of CO2 Methanation for Synthetic Natural .

A similar trend was observed for all the catalysts investigated with the various nickel loadings that they used. Similar results were reported by Jia et al. 24 using a Ni‐ZrO 2 catalyst for CO 2 methanation in a horizontal quartz tube, fixed bed reactor. They studied CO 2 methanation in the

Kinetics of CO2 methanation over a Ni/alumina industrial .

Kinetics of CO2 methanation over a Ni/alumina industrial .

The catalysts were reduced in situ before reaction in a 10% H 2 /N 2 stream for 1 h with a total gas flow of 50 mL.min−1 at 500ºC with a heating ramp of 5ºC.min−1. Carbon dioxide methanation was conducted at atmospheric pressure in a fixed-bed down-flow reactor at a range of temperatures between 325 – 400ºC.

Methanation process

Methanation process

2020-8-17 · Methanation is a chemical reaction that converts carbon monoxide and/or carbon dioxide to methane. The production of methane across the "Sabatier" reaction (1) is a well-known process for converting CO 2 to a useful product and was proposed by Paul Sabatier and J.B. Sendersens in 1902. A large-scale production of methane on the basis of carbon dioxide has never been widely established .

CFD-DEM SIMULATION OF SYNGAS-TO-METHANE .

CFD-DEM SIMULATION OF SYNGAS-TO-METHANE .

2018-4-18 · the type of fixed bed. In comparison with the fixed-bed reactor, the fluidized-bed reactor is better suited for the syngas-to-methane process because of its excellent heat removal capability (5). In principle, the fluidized-bed reactor should be superior to the fixed-bed reactor in the reactor performances, e.g., catalyst operating life

Vacuum Thermal Treated Ni-CeO2/SBA-15 Catalyst for CO2 .

Vacuum Thermal Treated Ni-CeO2/SBA-15 Catalyst for CO2 .

The reaction was carried out in a fixed bed quartz reactor (inner diameter (ID) = 8 mm) at atmospheric pressure. . The CO 2 conversion and CH 4 selectivity of the catalysts for CO 2 methanation reaction are shown in Figure 5. . Among Ni-based methanation catalysts, Ni/Al 2 O 3 catalyst is the most widely investigated and used due to its low .

coral reef-like Ni-Al2O3__

coral reef-like Ni-Al2O3__

2012-5-13 · Methanation of syngas was carried out over coral reef-like Ni/Al2 O3 catalysts in a continuous flow type fixed-bed reactor. The structure and properties of the fresh and used catalysts were studied by SEM, N2 adsorption-desorption, XRD, H2 -TPR, O2 -TPO, TG and ICP-AES techniques.

Experimental performance investigation of a 2 kW .

Experimental performance investigation of a 2 kW .

A 2 kW methanation reactor was designed, built and tested for the gas phase hydrogenation of CO 2 to CH 4. The reactor is a single-stage, fixed-bed reactor. A commercial catalyst with 0.5% wt Ru on an alumina support was applied and characterized using TEM imaging.

In-situ characterization of catalysts | CPE | Paul .

In-situ characterization of catalysts | CPE | Paul .

2020-6-9 · The implementation of sustainable energy supply has become a major issue. The production of Synthetic Natural Gas (SNG) from biomass can make an important contribution to achieve the goal. SNG can be produced via gasification of wood, followed by gas-cleaning and catalytic conversion of the producer gas in a methanation reactor. The producer gas upstream of the methanation step consists .

CO methanation and co-methanation of CO and CO over Mn .

CO methanation and co-methanation of CO and CO over Mn .

Abstract: A series of Mn-promoted 15 wt-% Ni/Al 2 O 3 catalysts were prepared by an incipient wetness impregnation method. The effect of the Mn content on the activity of the Ni/Al 2 O 3 catalysts for CO 2 methanation and the co-methanation of CO and CO 2 in a fixed-bed reactor was investigated. The catalysts were characterized by N 2 physisorption, hydrogen temperature-programmed reduction .

Steam Reforming of Methanol on Ni/Al O Catalyst in a Pd .

Steam Reforming of Methanol on Ni/Al O Catalyst in a Pd .

3 and Ru/Al 2O 3 catalysts were tested using a conventional fixed-bed flow reactor. Ni/Al 2O 3 catalyst showed the most stable activity at 723 K but rela-tively low hydrogen yield because of methanation. However, the hydrogen-permeable membrane reactor sup-pressed methanation and hydrogen yield was enhanced compared with the conventional .

A Simulation Study of the Steam Reforming of .

A Simulation Study of the Steam Reforming of .

2017-1-11 · F. A. A. Silva et al. 248 operation, fixed -bed FBR is continuously fed with a gas mixture (H 2O/CH 4 = 3.86) inlet. The base data used for the geometric conditions, catalyst properties and inlet operating conditions are illustrated in Table 1, in relation to the FBR reactor.

Enhanced CO 2 Methanation by New Microstructured .

Enhanced CO 2 Methanation by New Microstructured .

2019-2-20 · Catalytic Test in Multichannel Minireactor and Fixed-Bed Reactors. In a typical experiment, 2.5 g of catalyst were placed in a stainless steel multichannel minireactor (16 channels, inner diameter 1.75 mm) or a fixed-bed reactor having an inner diameter of 9 mm. The feed was a CO 2 and H 2 mixture with a constant H 2 /CO 2 ratio of 4.

Mono- and bimetallic metal catalysts based on Ni and Ru .

Mono- and bimetallic metal catalysts based on Ni and Ru .

The addition of small amounts of Ru to reduced Ni/Al 2 O 3 monolith catalysts improves the performance remarkably with respect to the rest of the catalysts. The resulting monolithic catalysis afforded a highly efficient CO 2 methanation with stable performance and negligible pressure drop at a space velocity as high as 5 × 10 5 h −1 .

Effect of reaction variables on CO methanation process .

Effect of reaction variables on CO methanation process .

Reaction variables for methanation process were investigated using self-independently developed NiO–La 2 O 3 –MgO/Al 2 O 3 catalyst in a big lab scale reactor. The effects of reaction parameters, such as temperature, pressure, H 2 /CO flow ratio and space velocity on the activity of methanation catalyst were studied. 100 % CO conversion and 95 % of selectivity of methane can be achieved at .

CO2 Methanation on Hydrotalcite‐Derived Catalysts and .

CO2 Methanation on Hydrotalcite‐Derived Catalysts and .

Moreover, cold plasma via dielectric barrier discharge (DBD) technology can also be implemented on the traditional fixed‐bed reactor. Ni–Ce–Zr/Mg–Al HT catalysts presented the higher CO 2 conversion of ≈70% at 325 °C in CO 2 methanation using plasma, compared with the conventional reactor, where merely 5% of CO 2 conversion was .

A fixed-bed reactor modeling study on the methanation of .

A fixed-bed reactor modeling study on the methanation of .

2014-4-1 · Sudiro et al. (2010) simulated a structured catalytic reactor consisting of an externally cooled reactor tube loaded with metallic honeycomb catalysts for the methanation of a mixture of CO and CO 2 using a 1D heterogeneous single-tube model.

Kinetics of methanation from carbon dioxide and .

Kinetics of methanation from carbon dioxide and .

2018-5-28 · Figure 1. Effect of nickel content on CO 2 conversion Figure 2. Effect of nickel content on methane selectivity The kinetics of the methanation reaction over this novel Ni-Co optimized catalyst was experimentally studied in a fixed bed reactor by varying the experimental conditions such as flowrate, temperature, and

Kinetic studies of CO2 methanation over a Ni/γ-Al2O3 .

Kinetic studies of CO2 methanation over a Ni/γ-Al2O3 .

2018-3-21 · methanation of CO2 at very low temperatures, viz. below 100°C (Jacquemin et al., 2010). The field has been reviewed recently by Gao et al. (2015). Mixed Ni/Pt or Ni/Pd catalysts have also received attention (Porosoff and Chen, 2013) in batch reactor studies. Although catalysts based on either Ru or Rh have been shown to be more active than

A fixed-bed reactor modeling study on the methanation of .

A fixed-bed reactor modeling study on the methanation of .

CO2 methanation experiments in an annular fixed‐bed reactor‐exchanger filled with 400 g of Ni/γ‐Al2O3 catalyst at pressures from 0.4 to 0.8 MPa and coolant temperatures from 473 to 548 K .

Methanation of CO2: Storage of Renewable Energy in a Gas .

Methanation of CO2: Storage of Renewable Energy in a Gas .

2013-5-5 · The first step of the reaction takes place in the single fixed bed reactor (R1 in Figure 2). Stages 2 to 4 are included in reactor R2, which is the so-called stage reactor (reactor from sulfuric .

Syngas methanation for substitute natural gas over Ni–Mg .

Syngas methanation for substitute natural gas over Ni–Mg .

A comparative study was conducted for laboratory syngas methanation over a self-made Ni–Mg/Al 2 O 3 catalyst to demonstrate the technical advantages of fluidized bed over fixed bed reactor. At different reaction temperatures, gas velocities and pressures, the CO conversion and selectivity to CH 4 in fluidized bed were shown to be higher than in fixed bed, and much closer to the thermodynamic .

Catalyst Particles for CO 2 Methanation Reactors .

Catalyst Particles for CO 2 Methanation Reactors .

2020-7-15 · However, the optimal operation of catalytic fixed-bed reactors for carbon dioxide methanation is a technological challenge. Under certain circumstances, the exothermicity and temperature-dependence of the methanation reaction can lead to uncontrollable reactor .

2016-5-12 · Schematic diagram of the pressurized fixed-bed reactor apparatus 、N 2,700 ℃,1.5 h。10 g, .