Economic and environmental impact of using hydrogen enriched natural gas and renewable natural gas for residential heating

Abstract

Natural gas, a fuel source that provides power generation and heating application, offers significant emissions and efficiency improvements over coal. The majority of natural gas is obtained through non-renewable deposits; however, it is possible to generate methane through the creation of Renewable Natural Gas (RNG). RNG is generated when biogas composed of CO2 and CH4 is methanated through the addition of hydrogen. An alternative sustainable pathway, however, is the creation of Hydrogen Enriched Natural Gas (HENG). HENG is created from the addition of hydrogen, in low volume percentages, to create a blend that emits less greenhouse gasses per unit of energy. The hydrogen used to create RNG and HENG can be generated from electrolysis using surplus electricity. Using surplus electricity, during off-peak hours, helps a jurisdiction effectively manage the power grid. As demonstrated through this case study the use of RNG and HENG to be utilized within the natural gas network can create an overall positive impact in any jurisdiction.