Catalytic partial oxidation of methane in microchannel reactors with co-current and countercurrent reagent flows: An experimental comparison

Макаршин, Л. Л.; Andreev, D.V.; Gribovskyi, A.G.; Parmon, Valentin N.

doi:10.1016/j.cej.2011.10.002

Cited by 21 publications

(11 citation statements)

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“…Therefore the surface tension of the liquid and the wetting characteristics of the microchannel wall material need to be adjusted such that microchannel filling, driven by capillary forces, takes place. 83 Filtered tap water, deionized water Copper 500-1000 Balsley (2009) 84 Deionized water Copper, surfaces were Au plated 1000-5000 Jackel (2011) 85 150-300 Filtered, deionized, deoxygenated water; 10% acetic acid Copper with Au coating Makarshin (2011) 91 50 Catalytic partial oxidation of methane FeCrAl Eichhorn and Gietzelt (2012) 76 Hot sulfuric acid (95-97% at 100 1C/50% at 125 1C)…”

Section: Corrosion Foulingmentioning

confidence: 99%

“…This might result in fouling layers or complete blockages of the microstructures or the equipment downstream. So far, no reports covering corrosion fouling in microstructured devices have been published, whereas papers covering the preliminary phenomena erosion [77][78][79][80][81][82] and/or corrosion [83][84][85][86][87][88][89][90][91] of microchannels exist. To give an overview of the investigations of these preliminary phenomena of corrosion fouling, Table 5 lists experimental reports of erosion and corrosion in microstructured devices stating the fluid or substance used, the surface material of the microchannel walls and the maximum duration of the experiments.…”

Section: Corrosion Foulingmentioning

confidence: 99%

“…Copper with Au coating Makarshin (2011) 91 50 Catalytic partial oxidation of methane FeCrAl Eichhorn and Gietzelt (2012) 76 Hot sulfuric acid (95-97% at 100 1C/50% at 125 1C) Nickel-based alloy and glassy carbon (Sigradur s G)…”

Section: Corrosion Foulingmentioning

confidence: 99%

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Fouling in microstructured devices: a review

et al. 2015

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Microstructured devices are widely used for manufacturing products that benefit from process intensification, with pharmaceutical products or specialties of the chemical industry being prime examples. These devices are ideally used for processing pure fluids. Where particulate or non-pure flows are involved, processes are treated with utmost caution since related fouling and blocking issues present the greatest barrier to operating microstructured devices effectively. Micro process engineering is a relatively new research field and there is limited understanding of fouling in these dimensions and its underlying processes and phenomena. A comprehensive review on fouling in microstructured devices would be helpful in this regard, but is currently lacking. This paper attempts to review recent developments of fouling in micro dimensions for all fouling categories (crystallization, particulate, chemical reaction, corrosion and biological growth fouling) and the sequential events involved (initiation, transport, attachment, removal and aging). Compared to fouling in macro dimensions, an additional sixth category is suggested: clogging by gas bubbles. Most of the reviewed papers present very specific fouling investigations making it difficult to derive general rules and parameter dependencies, and comparative or critical considerations of the studies were difficult. We therefore used a statistical approach to evaluate the research in the field of fouling in microchannels.

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Section: Corrosion Foulingmentioning

confidence: 99%

Section: Corrosion Foulingmentioning

confidence: 99%

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Fouling in microstructured devices: a review

et al. 2015

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“…Consequently, isothermal conditions can be obtained through utilizing microchannel reactors that can be applied even for extremely exothermic or endothermic reactions. 6 However, microchannel reactors require a thin film of heterogeneous catalyst that must be coated on the walls of the reactor via a proper coating technique. There are some common methods to prepare a coated film in the gas phase, including plasma spraying and chemical and physical vapor deposition (PVD).…”

Section: Introductionmentioning

confidence: 99%

Dry Reforming of Methane over Ni-Cu/Al₂O₃ Catalyst Coatings in a Microchannel Reactor: Modeling and Optimization Using Design of Experiments

2019

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In the present research, synthesis gas was produced through dry reforming of methane (DRM) in a microchannel reactor. First, a layer of Al2O3 was sputtered and deposited on a stainless steel plate, to prepare metallic catalyst support; then, a layer of Ni–Cu catalyst was deposited on the Al2O3. After undergoing a high-temperature DRM reaction, the catalyst-coated plates were tested and the fall-off rate was negligible because a firm active catalyst coating was formed. Using response surface methodology (RSM), deposition time (1, 3, and 5 min), Cu/Ni surface area percentage (10, 20, and 30%), and reaction temperature (700, 750, and 800 °C) were selected as the operating variables to investigate and optimize initial feed conversion, catalyst deactivation, and H2:CO ratio. Grazing incidence X-ray diffraction (GIXRD), field emission scanning electron microscopy (FESEM), and energy-dispersive X-ray (EDX) techniques were used to characterize Ni-Cu/Al2O3 catalyst coatings. Based on the results of GIXRD analysis, with increasing Cu/Ni surface area percentage up to 20%, there was a reduction in the particle size; however, when Cu/Ni surface area percentage increased further, the particle size increased. Moreover, in plates undergoing a longer time of deposition, the FESEM images showed denser grains that well-covered the substrate. EDX analysis indicated a proper dispersion, and the results confirmed the presence of the utilized elements. Overall, the results proved the significant impact of Cu percentage on the performance of the catalyst. The catalyst activity and stability during the reaction were higher in a promoted catalyst with low amounts of Cu, compared to the catalyst coated with high amounts of Cu. Under optimum conditions, i.e., the deposition time of 3.85 min, reaction temperature of 800.00 °C, and Cu/Ni surface area percentage of 18.39%, the initial conversions of CH4 and CO2 were 95.9975 and 98.7682%, respectively; the rate of deactivation of the catalyst was 0.493989%; and the H2:CO ratio was 0.969994. There was a good level of consistency between values obtained from the analysis of variance model and the results of the experimental tests. Furthermore, under the optimum conditions, the catalyst was not deactivated for 30 h on stream. Hence, the use of Ni-Cu/Al2O3 thin film in the designed microchannel showed satisfactory performance. Based on our findings, the designed reactor has a good performance, is compact enough, and is cost-effective. Thus, the technique utilized in this study is a convenient and favorable method for preparing high-performance structured catalysts.

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“…The literature presents different methods of the solution of this problem, but MC reactors for the POM are meant for operation at high (N 700°С) temperatures, which imposes restrictions on the materials for MC plates. In this respect, either silicon [10,11] or various ferrous alloys, such as stainless steel, nichrome, Nicrofer, and Fecralloy are used as heat-conductive and thermally stable materials for MC plates [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Syngas production by partial oxidation of methane in a microchannel reactor over a Ni–Pt/La0.2Zr0.4Ce0.4Ox catalyst

Макаршин

Sadykov

Andreev

et al. 2015

Fuel Processing Technology

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Catalytic partial oxidation of methane in microchannel reactors with co-current and countercurrent reagent flows: An experimental comparison

Cited by 21 publications

References 5 publications

Fouling in microstructured devices: a review

Fouling in microstructured devices: a review

Dry Reforming of Methane over Ni-Cu/Al₂O₃ Catalyst Coatings in a Microchannel Reactor: Modeling and Optimization Using Design of Experiments

Syngas production by partial oxidation of methane in a microchannel reactor over a Ni–Pt/La0.2Zr0.4Ce0.4Ox catalyst

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Catalytic partial oxidation of methane in microchannel reactors with co-current and countercurrent reagent flows: An experimental comparison

Cited by 21 publications

References 5 publications

Fouling in microstructured devices: a review

Fouling in microstructured devices: a review

Dry Reforming of Methane over Ni-Cu/Al2O3 Catalyst Coatings in a Microchannel Reactor: Modeling and Optimization Using Design of Experiments

Syngas production by partial oxidation of methane in a microchannel reactor over a Ni–Pt/La0.2Zr0.4Ce0.4Ox catalyst

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Dry Reforming of Methane over Ni-Cu/Al₂O₃ Catalyst Coatings in a Microchannel Reactor: Modeling and Optimization Using Design of Experiments