Abstract
Modeling of the Adiabatic and Isothermal Methanation ProcessIncreased use of biomass offers one of the ways to reduce anthropogenic impact on the environment. Using various biomass conversion processes, it is possible to obtain different types of fuels:• solid, e.g. bio-carbon;• liquid, e.g. biodiesel and ethanol;• gaseous, e.g. biomethane.Biomethane can be used in the transport and energy sector, and the total methane production efficiency can reach 65%. By modeling adiabatic and isothermal methanation processes, the most effective one from the methane production point of view is defined. Influence of the process parameters on the overall efficiency of the methane production is determined.
Highlights
Methanation is one of the process stages that transforms solid fuel into a gaseous form, and, as a result, biomethane is produced
Significant differences in the composition of the biomethane produced by these two types of methanation are not observed (Table IV)
The results of this work indicate that the composition of the synthesized gas has a greater impact on the outcome of methane in adiabatic methanation in the isothermal process
Summary
Methanation is one of the process stages that transforms solid fuel into a gaseous form, and, as a result, biomethane is produced. The field of biomethane use might be both the transport and energy sectors, since biomethane is easy to transport and store via the existing natural gas distribution networks and storage ranges [7, 8]. The collective target that is set between the member states of the European Union for renewable energy usage is defined in Directive 2009/28/EC [3]. The main aim of Directive 2003/30/EC is to stimulate use of biofuel in the transport sector. It defines that the total consumption of biofuel in the transport sector in the EU member states has to reach 2% in 2005 and 5.75% in 2010 [1]. The Latvian goal is for biofuel to reach a level of 37 % of the primary renewable energy use in the national energy balance by the year 2016 [2]. The same guidelines, had established that in 2010 the amount of the produced electricity from renewable sources (RES) had to reach 49.3% of the total consumed electricity, but in reality only 48.5% of the RES were produced [4]
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