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Alternative of Biogas Injection into the Danish Gas Grid System—A Study from Demand Perspective

1,2,* and 1,*
Danish Gas Technology Centre, Neergaards Vej 5B, DK-2970 Horsholm, Denmark
Biological and Chemical Engineering, Aarhus University, Hangovej 2, DK-8200 Aarhus N, Denmark
Authors to whom correspondence should be addressed.
ChemEngineering 2018, 2(3), 43;
Received: 8 August 2018 / Revised: 27 August 2018 / Accepted: 3 September 2018 / Published: 5 September 2018
(This article belongs to the Special Issue Advances in Bio-Fuels Production)
PDF [2687 KB, uploaded 5 September 2018]


The Danish government has set an ambitious target to achieve 100% fossil independence across all energy sectors, which demands optimum utilization of renewable energy sources, such as wind and biogas, by 2050. Biogas production has increased, and the upgrading of biogas offers a broad range of applications, such as transportation, and gas grid injection for downstream utilization. The biogas has to meet natural gas quality prior to injection into the gas grid system. The investment costs of the gas grid, upgrading cost, and gas compression costs are the major challenges for integrating the biogas into the existing gas infrastructure. In this investigation, the Wobbe index (WI) for raw biogas and upgraded biogas was measured to evaluate the scenario for biogas injection into the gas grid system. It was found that raw biogas has to improve its WI from 28.3 MJ/m3(n) to a minimum of 50.76 MJ/m3(n) via upgrading, and compressed to 40 bar system, to supply the gas grid system for trading. Then, yearly gas consumption by larger gas consumers was studied to evaluate the alternative approach of biogas utilization to save upgrading and compression costs for gas grid injection. View Full-Text
Keywords: biogas; Wobbe index; gas grid; biogas upgrading; biogas introduction biogas; Wobbe index; gas grid; biogas upgrading; biogas introduction

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Aryal, N.; Kvist, T. Alternative of Biogas Injection into the Danish Gas Grid System—A Study from Demand Perspective. ChemEngineering 2018, 2, 43.

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