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- W2376852713 abstract "Dimethyl Ether (DME) is an important chemical and has potential to be an ideal substitute for diesel or liquefied petroleum gas. In recent years, DME direct synthesis from synthesis gas has attracted much attention in research fields and industrial fields for its low cost and low energy consumption. The published papers focused mainly on the studies about catalysts preparation and characterization, the influence of promoters and supports on the catalysts performance, the effects of reaction condition and feed gas composition on the catalysts activity, kinetics and mechanism for DME synthesis. However, the study of catalyst deactivation during the DME synthesis was seldom mentioned in the literature. In this paper, BET, NH_3-TPD, TPD, TPO and N_2O Pulse Flow Experiments were carried out to investigate the deactivation of DME synthesis catalyst Cu-ZnO-ZrO_2/HZSM-5 derived from colloid sedimentation method. The results indicated that the catalyst deactivation did not result from the change in specific area, the acidity, the absorption species and carbon deposition on the catalyst during the DME synthesis process. The main reason for DME catalyst deactivation is the Cu sintering, which results in the decrease of specific surface area and dispersion of the active Cu species. Moreover, the results showed that it is useful for inhibiting the Cu sintering to synthesize DME using the syngas containing N_2 obtained by air partial oxidation of natural gas." @default.
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- W2376852713 date "2004-01-01" @default.
- W2376852713 modified "2023-09-25" @default.
- W2376852713 title "The Study on Catalyst Deactivation for Direct Synthesis of DME" @default.
- W2376852713 hasPublicationYear "2004" @default.
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