Dimethyl Ether Conversion into Light Olefins in a Slurry Reactor: Entrainment and Decomposition of Dispersion Liquid

Ежова, Н. Н.; Yashina, O. V.; Stashenko, A. N.; Khivrich, E. N.; Колесниченко, Н. В.

doi:10.1134/s0023158419040037

Cited by 3 publications

(2 citation statements)

References 33 publications

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“…The catalyst in this type of reactor is less prone to deactivation, although losses may occur during the reaction. However, the disadvantage of this reactor is the need to use complicated equipment [94,95]. Among the most-used solvents, paraffin [19,[96][97][98]…”

Section: (D) Slurry Reactorsmentioning

confidence: 99%

“…Compared with fixed-bed reactors, the temperature control in slurry reactors is much simpler due to the large heat capacity of the solvent. Nevertheless, the use of this reactor has some disadvantages, such as the complicated equipment necessary for the proper operation of the reactor and the loss of catalyst particles during the process [35,94,95,109,110]. The main advantage of using a slurry reactor includes the even temperature distribution inside the reactor, which allows for sintering avoidance, and the reduction of energy requirements.…”

Section: (B) Slurry Phase Reactorsmentioning

confidence: 99%

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A Review on Deactivation and Regeneration of Catalysts for Dimethyl Ether Synthesis

et al. 2022

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The deactivation of catalysts and their regeneration are two very important challenges that need to be addressed for many industrial processes. The most quoted reasons for the deterioration of dimethyl ether synthesis (DME) concern the sintering and the hydrothermal leaching of copper particles, their migration to acid sites, the partial formation of copper and zinc hydroxycarbonates, the formation of carbon deposits, and surface contamination with undesirable compounds present in syngas. This review summarises recent findings in the field of DME catalyst deactivation and regeneration. The most-used catalysts, their modifications, along with a comparison of the basic parameters, deactivation approaches, and regeneration methods are presented.

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Section: (D) Slurry Reactorsmentioning

confidence: 99%

Section: (B) Slurry Phase Reactorsmentioning

confidence: 99%

A Review on Deactivation and Regeneration of Catalysts for Dimethyl Ether Synthesis

et al. 2022

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Deactivation of Mg/HZSM-5 Catalysts for the Synthesis of Lower Olefins from Dimethyl Ether in a Slurry Reactor

Stashenko,

Batova,

Obukhova

et al. 2024

Catal. Ind.

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Features of the deactivation of Mg/HZSM-5 catalysts for the synthesis of lower olefins from dimethyl ether in a slurry reactor

et al. 2023

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In a slurry reactor, the formation of compaction products on Mg/HZSM-5 catalysts, irrespective of the SiO2 /Al2O3 molar ratio in the zeolite, proceeds predominantly on strong acidic sites. The composition of compaction products (mostly trimethyl- and tetramethylbenzenes) virtually does not change with a growth of the molar ratio; however, their amount decreases, which is related to a growth of the mesopore volume with an increase in the SiO2 /Al2O3 ratio. This leads to a decrease in diffusion limitations and contribution of secondary reactions and enhances the removal of coke precursors from the zeolite surface, thus promoting the catalyst activity (the conversion of DME increases twofold). The composition of reaction products changes only slightly with a growth of the SiO2 /Al2O3 molar ratio, the total selectivity to lower olefins is ca. 70 wt.%. A rapid loss of the Mg/HZSM-5 activity with extending the operation time in a slurry reactor is caused not by coking, but rather by «clogging» of the catalyst with decomposition products of the dispersion medium (polydimethylsiloxane).

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Dimethyl Ether Conversion into Light Olefins in a Slurry Reactor: Entrainment and Decomposition of Dispersion Liquid

Cited by 3 publications

References 33 publications

A Review on Deactivation and Regeneration of Catalysts for Dimethyl Ether Synthesis

A Review on Deactivation and Regeneration of Catalysts for Dimethyl Ether Synthesis

Deactivation of Mg/HZSM-5 Catalysts for the Synthesis of Lower Olefins from Dimethyl Ether in a Slurry Reactor

Features of the deactivation of Mg/HZSM-5 catalysts for the synthesis of lower olefins from dimethyl ether in a slurry reactor

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