Simulation-Based Evaluation of a Two-Stage Small-Scale Methanation Unit for Decentralized Applications
| Autor: | Stefan Rönsch, Peter Treiber, Jürgen Karl, Jonas Widzgowski, Michael Neubert, Marius Dillig |
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| Rok vydání: | 2017 |
| Předmět: |
Substitute natural gas
Work (thermodynamics) Chemistry business.industry 020209 energy General Chemical Engineering Energy Engineering and Power Technology 02 engineering and technology Polytropic process Chemical kinetics Fuel Technology Methanation 0202 electrical engineering electronic engineering information engineering Gas composition Process engineering business Syngas Space velocity |
| Zdroj: | Energy & Fuels. 31:2076-2086 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/acs.energyfuels.6b02793 |
| Popis: | The present work aims for a simulation-based evaluation of a two-stage methanation unit for the production of substitute natural gas (SNG) in decentralized small-scale applications with low complexity. Equilibrium calculations reveal a remarkable impact of CO2 removal efficiency on final SNG composition with an optimum removal efficiency of 85% for the examined synthesis gas. The first methanation stage consists of a polytropic fixed-bed methanation reactor and is implemented as a one-dimensional pseudohomogeneous model in Aspen PlusTM with reaction kinetics from literature. The comparison of three different kinetic models reveals that reverse reaction of CO methanation has to be considered in the kinetic rate equations for appropriate modeling within a dynamic temperature range above 400 °C in case of polytropic reactors. The first methanation stage is examined with one kinetic model in terms of reactor geometry, varying GHSV and influence of the feed gas composition to determine limits in upscaling and ... |
| Databáze: | OpenAIRE |
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