Nanocomposites on the basis of layered silicates as the catalysts for the dehydrogenation of methanol

Vedyagin, Aleksey A.; Nizovskiĭ, A. I.; Golohvast, K. S.; Цырульников, П. Г.

doi:10.1134/s1995078014060172

Cited by 6 publications

(5 citation statements)

References 17 publications

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“…dimethyl ether), and higher temperatures favor gaseous products such as CO or CO 2 . It has been demonstrated that copper was the active species for MF syntheses − and previous studies − also showed that metallic copper was the major active species for the methanol dehydrogenation reaction. Besides copper, there are other materials that can act as catalysts for this reaction, including palladium, nickel, and platinum .…”

Section: Introductionmentioning

confidence: 94%

Nonoxidative Dehydrogenation of Methanol to Methyl Formate through Highly Stable and Reusable CuMgO-Based Catalysts

et al. 2019

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Nonoxidative dehydrogenation of methanol to methyl formate over a CuMgO-based catalyst was investigated. Although the active site is metallic copper (Cu 0 ), the best reaction conditions were obtained by tuning the ratio of Cu/Mg and doping the catalyst with 1 wt % of Pd to achieve a very specific activity for methyl formate synthesis. On the basis of the CO 2 temperature-programmed desorption study, the basic strength of the catalyst plays a role in the efficient conversion of methanol to methyl formate via dehydrogenation. These CuMgO-based catalysts show excellent thermal stability during the reaction and the regeneration processes. Approx. 80% methanol conversion with constant selectivity to methyl formate was achieved even after 4 rounds of usage for a total reaction time exceeding 200 h, indicative of their potential for practical applications.

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Section: Introductionmentioning

confidence: 94%

Nonoxidative Dehydrogenation of Methanol to Methyl Formate through Highly Stable and Reusable CuMgO-Based Catalysts

et al. 2019

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“…Methanol dehydrogenation produces hydrogen as a byproduct, which is an energy source, and is also more environmentally and economically efficient than the other methods . Several studies have indicated that copper-based catalysts are the most effective agents for dehydrogenating methanol. ,, The reaction can also be catalyzed by other metals, such as platinum, nickel, and palladium …”

Section: Introductionmentioning

confidence: 99%

“…17 Several studies have indicated that copper-based catalysts are the most effective agents for dehydrogenating methanol. 16,21,22 The reaction can also be catalyzed by other metals, such as platinum, nickel, and palladium. 23 1.3.…”

Section: Introductionmentioning

confidence: 99%

Improvement in Ammonia, Hydrogen, and Methyl Formate Synthesis Process by Employing Multiobjective Optimization of a Novel Multifunctional Membrane Reactor

2023

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This investigation analyzes the simultaneous production of hydrogen and ammonia as carbon-free energy carriers and methyl formate (MF) as a widely used chemical intermediate in a multifunctional membrane reactor (MFMR). The MFMR, based on Le Chatelier’s principle, has the advantage of changing the thermodynamic equilibrium by direct thermal coupling between ammonia synthesis and MF production and shifting the chemical equilibrium with the use of the Pd–Ag membrane. In the innovative configuration, the nitrogen conversion rate has been increased from 38.2 to 41.2% and the methanol conversion from 16.3 to 99.1%. Other benefits of the MFMR include providing the required energy for an endothermic reaction and eliminating a furnace and cooler in methanol dehydrogenation and ammonia synthesis reactors. Furthermore, it has been demonstrated that if the ammonia synthesis reaction is positioned at the center side of the MFMR, the nitrogen and methanol conversion are, respectively, 1.32 and 7.34% higher than when the reaction is located at the outer side of the MFMR. Likewise, the effect of operational process parameters such as inlet flow rates, inlet temperatures, and membrane thickness on the performance of each reaction has been studied. Utilizing multiobjective optimization (MOO), it has been observed that ammonia and MF production yields can reach 20.3 and 24.1%, respectively.

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“…If the bulk copper undergoes melting at the temperature of 1083 • C, then the copper particles of 20 nm in size should start to melt at ~1000 • C. Further decrease in particle size to 10 and 5 nm is expected to result in the melting temperature values of ~750 and ~500 • C. Therefore, an approaching of the process temperature to the expected melting temperature should lead to a noticeable increase in the lability of copper species and their agglomeration into the thermodynamically favorable large particles. In order to solve the mentioned problem, copper and its oxide are deposited on various supports, and the metal-support interactions play the key roles here, providing the long-term stability of the supported copper species during the catalyst exploitation [1,9,30,[32][33][34][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, an approaching of the process temperature to the expected melting temperature should lead to a noticeable increase in the lability of copper species and their agglomeration into the thermodynamically favorable large particles. In order to solve the mentioned problem, copper and its oxide are deposited on various supports, and the metal-support interactions play the key roles here, providing the long-term stability of the supported copper species during the catalyst exploitation [ 1 , 9 , 30 , 32 , 33 , 34 , 43 , 44 , 45 ].…”

Section: Introductionmentioning

confidence: 99%

Sol-Gel Synthesis and Characterization of the Cu-Mg-O System for Chemical Looping Application

et al. 2022

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A sol-gel technique was applied to prepare the two-component oxide system Cu-Mg-O, where MgO plays the role of oxide matrix, and CuO is an active chemical looping component. The prepared samples were characterized by scanning electron microscopy, low-temperature nitrogen adsorption, and X-ray diffraction analysis. The reduction behavior of the Cu-Mg-O system was examined in nine consecutive reduction/oxidation cycles. The presence of the MgO matrix was shown to affect the ability of CuO towards reduction and re-oxidation significantly. During the first reduction/oxidation cycle, the main characteristics of the oxide system (particle size, crystallization degree, etc.) undergo noticeable changes. Starting from the third cycle, the system exhibits a stable operation, providing the uptake of similar hydrogen amounts within the same temperature range. Based on the obtained results, the two-component Cu-Mg-O system can be considered as a prospective chemical looping agent.

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Nanocomposites on the basis of layered silicates as the catalysts for the dehydrogenation of methanol

Cited by 6 publications

References 17 publications

Nonoxidative Dehydrogenation of Methanol to Methyl Formate through Highly Stable and Reusable CuMgO-Based Catalysts

Nonoxidative Dehydrogenation of Methanol to Methyl Formate through Highly Stable and Reusable CuMgO-Based Catalysts

Improvement in Ammonia, Hydrogen, and Methyl Formate Synthesis Process by Employing Multiobjective Optimization of a Novel Multifunctional Membrane Reactor

Sol-Gel Synthesis and Characterization of the Cu-Mg-O System for Chemical Looping Application

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