In Europe, green hydrogen and biogas/green gas are considered important renewable energy carriers, besides renewable electricity and heat. Still, incentives proceed slowly, and the feasibility of local green gas is questioned. A supply chain of decentralised green hydrogen production from locally generated electricity (PV or wind) and decentralised green gas production from locally collected biomass and biological power-to-methane technology was analysed and compared to a green hydrogen scenario. We developed a novel method for assessing local options. Meeting the heating demand of households was constrained by the current EU law (RED II) to reduce greenhouse gas (GHG) emissions by 80% relative to fossil (natural) gas. Levelised cost of energy (LCOE) analyses at 80% GHG emission savings indicate that locally produced green gas (LCOE = 24.0 €ct kWh−1) is more attractive for individual citizens than locally produced green hydrogen (LCOE = 43.5 €ct kWh−1). In case higher GHG emission savings are desired, both LCOEs go up. Data indicate an apparent mismatch between heat demand in winter and PV electricity generation in summer. Besides, at the current state of technology, local onshore wind turbines have less GHG emissions than PV panels. Wind turbines may therefore have advantages over PV fields despite the various concerns in society. Our study confirms that biomass availability in a dedicated region is a challenge.
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The Bio-P2G-program (Bio-Power to Gas) at the Hanze University of AppliedSciences evaluates the technologic feasibility of the biological reduction of carbondioxide with hydrogen to methane (biomethanation: 1 CO2 + 4 H2 -> CH4 + 2 H2O)Chemically, this process is known as the Sabatier reaction, but within anaerobicdigestion the biological methanation is catalyzed by a specific group ofmicroorganisms: the hydrogenotrophic methanogens.
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Power-to-gas technologies are considered to be part of the future energy sys- tem, but their viability and applicability need to be assessed. Therefore, models for the viability of farm-scale bio-power-to-methane supply chains to produce green gas were analysed in terms of levelised cost of energy, energy efficiency and saving of greenhouse gas emission. In bio-power-to-methane, hydrogen from electrolysis driven by surplus renewable electricity and carbon dioxide from biogas are converted to methane by microbes in an ex situ trickle-bed reactor. Such bio-methanation could replace the current upgrading of biogas to green gas with membrane technology. Four scenarios were compared: a refer- ence scenario without bio-methanation (A), bio-methanation (B), bio-methanation combined with membrane upgrading (C) and the latter with use of renewable energy only (all-green; D). The reference scenario (A) has the lowest costs for green gas production, but the bio-methanation scenarios (B-D) have higher energy efficiencies and environmental benefits. The higher costs of the bio-methanation scenarios are largely due to electrolysis, whereas the environmental benefits are due to the use of renewable electricity. Only the all- green scenario (D) meets the 2026 EU goal of 80% reduction of greenhouse gas emissions, but it would require a CO2 price of 200 € t−1 to achieve the levelised cost of energy of 65 €ct Nm−3 of the reference scenario. Inclusion of the intermittency of renewable energy in the scenarios substantially increases the costs. Further greening of the bio-methanation supply chain and how intermittency is best taken into account need further investigation.
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The project BioP2M came to a close in June 2019 after a consortium of stakeholders in the field of energy transition worked together to research the diverse role of Methane. In this report the results are presented and future plans are discussed.
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Wind and solar power generation will continue to grow in the energy supply of the future, but its inherent variability (intermittency) requires appropriate energy systems for storing and using power. Storage of possibly temporary excess of power as methane from hydrogen gas and carbon dioxide is a promising option. With electrolysis hydrogen gas can be generated from (renewable) power. The combination of such hydrogen with carbon dioxide results in the energy carrier methane that can be handled well and may may serve as carbon feedstock of the future. Biogas from biomass delivers both methane and carbon dioxide. Anaerobic microorganisms can make additional methane from hydrogen and carbon dioxide in a biomethanation process that compares favourably with its chemical counterpart. Biomethanation for renewable power storage and use makes appropriate use of the existing infrastructure and knowledge base for natural gas. Addition of hydrogen to a dedicated biogas reactor after fermentation optimizes the biomethanation conditions and gives maximum flexibility. The low water solubility of hydrogen gas limits the methane production rate. The use of hollow fibers, nano-bubbles or better-tailored methane-forming microorganisms may overcome this bottleneck. Analyses of patent applications on biomethanation suggest a lot of freedom to operate. Assessment of biomethanation for economic feasibility and environmental value is extremely challenging and will require future data and experiences. Currently biomethanation is not yet economically feasible, but this may be different in the energy systems of the near future.
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This publication gives a different take on energy and energy transition. Energy goes beyond technology. Energy systems are about people: embedded in political orders and cultural institutions, shaped by social consumers and advocacy coalitions, and interconnected with changing parameters and new local and global markets. An overview and explanation of the three end states have been extracted from the original publication and appear in the first chapter. The second chapter consists of an analysis exploring key drivers of change until 2050, giving special attention to the role of international politics, social dynamics and high-impact ideas. The third chapter explores a case study of Power to Gas to illustrate how the development of new technologies could be shaped by regulatory systems, advocacy coalitions and other functions identified in the ‘technology innovation systems’ model. The fourth chapter explores the case of Energy Valley to understand how local or regional energy systems respond to drivers of change, based on their contextual factors and systems dynamics.
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The traditional energy industry is transitioning from a centralised fossil fuel based industry to a decentralised renewable energy industry for several reasons including climate change, policy, and changing customer needs. Furthermore, renewable sources, such as wind and solar, are intermittent and unpredictable. This has implications for the business models of energy producers, such as increased mismatch between demand and supply, increased price volatility, shift in drivers of value creation. Due to the low marginal cost of production and the intermittent nature of renewables, the price volatility on the electricity markets, in particular the imbalance market, are expected to increase. However, there is potential for market parties operating in the electricity sector to profit from this development by providing flexibility to balance electricity supply and demand. Therefore, new business models are needed that can harness and exploit flexibility in a viable manner. In these business models, flexibility becomes the key driver of value creation.
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One potential renewable energy resource is green gas production throughanaerobic digestion (AD). However, only part of the biogas produced (up to50-60%) contains the combustible methane; the remainder are incombustiblegasses with the biggest being carbon dioxide. These gasses are often not usedand expelled in the atmosphere. Through the use of BIO-P2M where hydrogenis mixed with the remaining CO2 additional methane can be produced,increasing the yield and using the feedstocks more effectively. Within thisresearch the environmental sustainability and effectiveness of BIO-P2M isevaluated using the MEFA and aLCA method, expressed in; net green gasproduction, efficiency in (P)EROI, emissions in GWP100, and environmentalimpact in Ecopoints. The functional unit is set as a normal cubic meter ofGroningen quality natural gas. Results indicate a net improvement of allindicators when applying BIO-P2M in several configurations (in situ, ex situ).When allocating the production of renewable energy to the BIO-P2M systemenvironmental impacts for wind the results are still positive; however, whenusing solar PV as an energy source the environmental impact in Ecopointsexceeds that of the reference case of Groningen natural gas. An additionaloption for improving the indicators is optimization of the process. When usingBIO-P2M combined with heat and power unit for producing the internalelectricity and heat demands all indicators are improved substantially. On anational scale when utilizing al available waste materials for the BIO-P2Msystem around 1217 MNm3/a of green gas can be produced, which is 3% ofthe total yearly consumption in the Netherlands and around 60% more thanwhen using normal AD systems. Within the context BIO-P2M is an interestingoption for increasing green gas output and improving the overall sustainabilityof the AD process. However, the source of green electricity needs to be takeninto account and process optimization can ensure better environmentalperformance.
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On the 11th of may 2016 dr. ir. J. Dam officially started his professorship in Sustainable LNG Technology at the Hanze University of Applied Science. In this Inaugural speech he declared his hopes and plans for the Hanze University and it's Centre of Expertise - Energy.
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Aanleiding De productie van wind- en zonne-energie gaat met onzekerheid gepaard. Dat kan leiden tot een gebrek aan evenwicht tussen vraag en aanbod van energie. Power-to-Gas (P2G) middels biologische methaanvorming (Bio-P2G) is een methode om meer en hogere kwaliteit methaan te maken als drager en opslag van duurzame energie. Bio-P2G zou daarmee een technologisch en economisch aantrekkelijke bijdrage kunnen leveren aan een betere afstemming van vraag en aanbod. En daarmee aan de overgang van fossiele naar duurzame energie en aan de vermindering van de kooldioxide-uitstoot. Zeven bedrijven, die samen de gehele gaswaardeketen vertegenwoordigen, willen weten hoe Bio-P2G in de toekomst kan uitwerken en hoe dit hun bedrijfsvoering zou beïnvloeden. Doelstelling Dit project beoogt in kaart te brengen of Bio-P2G op technologisch en economisch aantrekkelijke wijze kan bijdragen aan de afstemming van vraag en aanbod van duurzame energie in Nederland en zo ja, onder welke voorwaarden. Het programma start met een literatuuronderzoek naar de kennis rond Bio-P2G. Op basis van dit onderzoek selecteert het team de gunstigste parameters. Speciale aandacht gaat daarbij uit naar de bacteriën die zorgen voor de methaanvorming. Het onderzoeksteam identificeert en karakteriseert deze via DNA-technologie. De resultaten daarvan zijn richtinggevend voor de proefinstallatie waarmee het projectteam checkt of de prestaties en werkzaamheid ook op grotere schaal gelden. Het team gebruikt eigen data, data uit het literatuuronderzoek en data van de consortiumbedrijven voor het economisch modelleren van de Bio-P2G-keten. Beoogde resultaten Het consortium beoogt twee resultaten: 1) de mogelijkheden en grenzen vaststellen van het integreren van Bio-P2G in het Nederlandse energiesysteem; 2) een beschrijving van hoe deze integratie in een periode van 10 tot 15 jaar gerealiseerd kan worden. Bij het project zijn studenten van 6 bacheloropleidingen van de Hanzehogeschool betrokken. Ook studenten van de European Master of Renewable Energy, een promovendus (RuG) en verschillende lectoraten participeren in het project. De kennisuitwisseling en -disseminatie met de maatschappelijke partners vindt onder meer plaats via twee publieke evenementen, publicaties en een proefschrift. Aan de hand van een communicatie- en implementatieplan worden de resultaten van het project vertaald naar de curricula en de beroepspraktijk.
