Techno-economic assessment of natural gas displacement potential of biomethane: A case study on domestic energy supply in the UK

Abstract

Mathematical modelling and optimisation at both household and energy supply network levels were developed to study the transformation of the natural gas-based domestic energy supply system with the introduction of biomethane generation, processing and utilisation based on a range of feedstock and conversion technologies. Biomethane processing includes, among other options considered, the conceptual development of a novel approach for upgrading biogas which utilises existing onshore natural gas processing capacity. Four different objective functions were considered for optimisation, representing different economic and environmental propositions, to identify the best path for introducing biomethane with multiple types of feedstock. Applying these objective functions to UK’s domestic energy supply, and assuming a range of subsidies available, it was established that a technically significant displacement of natural gas could be achieved, with displacement capabilities of 48%–72%, and greenhouse gas (GHG) reductions between 64% and 80%. Economically, these ranges of achievement would correspond to various levels of capital investment and economic viability, depending on the objective functions. Those cases leading to a positive net present value (NPV) appeared to heavily rely on subsidies and could run into a significant loss if subsidies were removed in the operational phase. In contrast, optimisation not assuming any subsidies in the first place could lead to a fundamentally economically viable system, but at the cost of a significantly lower level of biomethane penetration compared to the cases assuming subsidies. Overall, the results have indicated the importance of carefully selecting optimisation objectives, and revealed the potential consequences of adopting financial subsidies in developing the biomethane infrastructure

Contribution of encouraging the future use of biomethane to resolving sustainability and energy security challenges: The case of the UK

“…National Grid's 'Two Degrees' was deemed the most appropriate scenario, and so two further variants were calculated and put alongside. The first infused a biomethane-over-natural-gas displacement scenario from the work of (Fubara et al, 2018). The other did the same using potential biomethane production volumes from a report prepared for a UK regional gas transporter (Scholes et al, 2017).…”

High-Temperature Materials for Complex Components in Ammonia/Hydrogen Gas Turbines: A Critical Review

“…However, their widespread adoption and performance optimisation are impeded by several material challenges. The hightemperature, high-pressure, and chemically aggressive environments inherent in these turbines demand materials that can withstand extreme conditions while maintaining structural integrity, functional performance, and long-term durability [12][13][14][15][16][17]. A key challenge in the development of high-temperature materials for ammonia-hydrogen gas turbines is the need for robust coatings and surface treatments to protect the materials from corrosion and oxidation.…”

Development of the Program Complex of Calculation of Gas Pipes of Natural Gas and Biogas

“…Основными направлениями развития системы газоснабжения России является модернизация существующих систем газораспределения и использование альтернативных источников энергии (сжиженного природного газа, компримированного природного газа и сжиженного углеводородного газа) [4][5][6]. Одним из перспективных направлений развития систем газоснабжения, получившим широкое применение в странах Европейского Союза, является получение и распределение биогаза [7][8][9][10].…”