Abstract
The exploitation of the biomethane as transport fuel is receiving increasing attention in many European countries. Technologies and processes for improving the Biogas-to-biomethane production with a lower energy consumption and lower costs are objective of several techno-economic studies. In this paper two promising concepts for the biogas conversion are proposed and analyzed considering both technical and economic issues. The analysis regards the biogas upgrading by means of the chemical absorption with Hot Potassium Carbonate and the direct methanation of biogas by adding renewable hydrogen. In order to assess the feasibility of these technologies the numerical modelling has been applied for the plants designing. The energy results have then been used to assess the expected biomethane production price and a sensitivity analysis on the main parameters has been performed. Finally, economic performance of the options proposed will be evaluated under different market conditions.
Highlights
Biogas produced from biomass is considered a promising solution for biofuels production [1,2]
The biogas upgrading process selected for obtaining the biomethane is based on the Hot Potassium Carbonate (HPC) technology [4]; as a matter of fact, K2CO3 solution is an interesting option for realizing the biogas upgrading from the environmental hazard point of view
This paper analysed two strategies to produce biomethane starting from biogas: the biogas upgrading by means of the chemical absorption with Hot Potassium Carbonate and the direct methanation of biogas by adding renewable hydrogen, as in a Power to Gas configuration
Summary
Biogas produced from biomass is considered a promising solution for biofuels production [1,2]. The methods for upgrading biogas to biomethane is divided into two categories: a) Biogas upgrading by removal of the CO2 fraction by means of physical or chemical processes; b) Direct methanation of biogas by reacting the CO2 fraction with hydrogen from another source. These methods mainly differ for the efficiency in the methane production and for the investment costs. This paper is focused on the energy and economic analysis of these methods through the designing and modelling of two plants configurations: the biogas to methane (B2M) plant via upgrading process and biogas and hydrogen to methane (BH2M) plant via direct methanation
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