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Abstract

This dissertation examines the role of renewable gases - biomethane and synthetic natural gas (SNG) - in Germany's energy transition, focusing on the residential heating and private transportation sectors. The research is grounded in a coevolutionary approach, that emphasizes socio-technical system transitions, and draws on theories of consumer decision-making and energy policy design. A mixed-methods approach underpins this work: qualitative analyses explore policy frameworks and consumer perceptions, while quantitative Discrete Choice Experiments investigate consumer preferences and willingness-to-pay (WTP). Empirically, the five articles of this cumulative dissertation highlight critical findings. Policies favor renewable gases in electricity and transportation, leaving heating markets underdeveloped, with biomethane adoption largely driven by regulatory mandates. Consumer decisions in these markets are marked by low involvement, limited awareness, and significant price sensitivity. Nevertheless, there is notable willingness to pay for renewable gas products, particularly SNG, though this willingness often fails to match higher production costs. The four articles are structured into two parts. The first part explores the policy and market structures shaping renewable gas uptake, including an analysis of tariff offerings and the regulatory landscape. The second part delves into consumer behavior, with articles assessing perceptions, preferences, and pricing dynamics for biomethane and SNG. Collectively, this dissertation advances the literature on energy transitions, consumer behavior, and renewable gas market integration, offering actionable insights for policymakers, market stakeholders, and researchers.