Optimization of fixed-bed methanation reactors: Safe and efficient operation under transient and steady-state conditions

被引：38

作者：

Fache, Axel ^{[1
]}

Marias, Frederic ^{[1
]}

Guerre, Vincent ^{[2
]}

Palmade, Stephane ^{[2
]}

机构：

[1] Univ Pau & Pays Adour, Lab Therm Energet & Proc IPRA EA1932, F-64000 Pau, France

[2] ENOSIS, 12 Rue Louis Courtois Vicose, F-31400 Toulouse, France

来源：

CHEMICAL ENGINEERING SCIENCE | 2018年 / 192卷

关键词：

Methanation; Transient simulation; Modeling; Catalyst dilution; POWER-TO-GAS; START-UP; CARBON-DIOXIDE; DILUTION;

D O I：

10.1016/j.ces.2018.08.044

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Designing and optimizing packed-bed methanation reactors for power-to-gas leads to conflicting issues. Because of the high exothermicity of the reaction, it might be inefficient (low Gas Hourly Space Velocity), or unsafe (runaway, thermal degradation). Dynamically operating reactors are thus particularly difficult to design. In this paper, the behavior of a reactor with multiple catalyst-dilution zones is studied numerically. Simulations of a dynamic sequence (reactor startup) are carried out. The effect of catalyst dilution profile on steady state and transient efficiency is analyzed. We introduce a method to maximize GHSV, while guarantying safe operation during both transient and steady state operation. A proper catalyst dilution profile can increase the steady state efficiency and stability of the reactor. However, the results of the present study show that this dilution profile can have a negative impact on transient efficiency and stability. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：1124 / 1137

页数：14

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