Enhancement of the Direct Synthesis of Dimethyl Ether (DME) from Synthesis Gas by Macro- and Microstructuring of the Catalytic Bed

被引:12
作者
Bizon, Katarzyna [1 ]
Skrzypek-Markiewicz, Krzysztof [1 ]
Continillo, Gaetano [2 ]
机构
[1] Cracow Univ Technol, Fac Chem Engn & Technol, Ul Warszawska 24, PL-31155 Krakow, Poland
[2] Univ Sannio, Dipartimento Ingn, Piazza Roma 21, I-82100 Benevento, Italy
关键词
process integration; direct synthesis of dimethyl ether; bifunctional catalyst pellet; process intensification; multifunctional catalytic reactor; MAXWELL-STEFAN APPROACH; MASS; SIMULATION; DIFFUSION; REACTOR; DESIGN;
D O I
10.3390/catal10080852
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
This work reports on a modelling study of the influence of the distribution of metallic and acidic active centers within a catalytic fixed-bed reactor for the direct synthesis of dimethyl ether (DME), conducted to demonstrate the potential of reactor-level and pellet-level structuring of catalytic active centers in process integration and intensification. To account for the pellet structure, the analysis was performed with the aid of a heterogeneous model considering both interphase and intrapellet mass transport resistances. The study evaluated, in terms of DME and methanol yield and selectivity, the performance of a tubular reactor loaded with a physical mixture of monofunctional catalyst pellets or structured bifunctional catalyst pellets with different arrangements of the catalytic centers. It was confirmed that bifunctional catalysts overperform significantly a physical mixture of monofunctional particles. Moreover, it was shown that the internal structure of a bifunctional catalyst pellet is an important feature that deserves to be exploited deeper, in view of further intensification of the DME synthesis process to be achieved with a better reactor design.
引用
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页数:16
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