Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

CFD Simulation and Optimization of Adiabatic Reaction Process of C-2 Hydrogenation

Version 1 : Received: 22 October 2020 / Approved: 23 October 2020 / Online: 23 October 2020 (20:11:44 CEST)

How to cite: Wei, W. CFD Simulation and Optimization of Adiabatic Reaction Process of C-2 Hydrogenation. Preprints 2020, 2020100499 (doi: 10.20944/preprints202010.0499.v1). Wei, W. CFD Simulation and Optimization of Adiabatic Reaction Process of C-2 Hydrogenation. Preprints 2020, 2020100499 (doi: 10.20944/preprints202010.0499.v1).

Abstract

In this paper, the computational fluid dynamics (CFD) method has been used to simulate the gas flow and the catalytic hydrogenation process of the C-2 hydrogenation adiabatic reactor in a practical ethylene production unit of a chemical plant. The laminar finite-rate model was used for the chemical reaction model. The standard two-equation model was used for the turbulence model. The exponent-function kinetic model was used for the reaction dynamics model. The simulation results were in good agreement with the actual industrial data obtained from the C-2 hydrogenation reactor, and the distributions of reaction parameters such as temperature and component concentrations in the reactor were further analyzed. Based on the validated CFD models, the structure and operating conditions of the reactor, as well as hydrogen load distribution ratios, are simulated for comparing the comprehensive performance metrics of ethylene selectivity and acetylene conversion rate; as a result, we can obtain the optimal temperature of 312 K, the optimal hydrogen/acetylene ratio of 0.10 as well as the optimal hydrogen load distribution ratio of 4:4:2, and the diameter/height ratio exerts a marginal effect on the selectivity, conversion rate and harmonic mean of the reactor.

Subject Areas

C-2 hydrogenation adiabatic reactor; mathematical model; CFD simulation; optimization

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