For centuries, natural gas has been one of humanity’s main energy sources. The gas sector is still heavily reliant on natural gas production; however, as natural gas fields contain only a finite quantity of gas, its continued extraction is leading to the resource’s depletion. Furthermore, natural gas production has become a subject of debate, with many considering continued utilisation incompatible with the achievement of international and European climate goals. The need for alternative gases that are less damaging to the environment is becoming increasingly evident. Biomethane has shown itself to be a reliable alternative to natural gas, and if sourced and manufactured responsibly results in no new CO2 emissions. Another alternative, hydrogen, can, through the process of methanisation, be converted into synthetic natural gas (SNG). This chapter discusses the legal aspects of the production and use of biomethane, hydrogen and SNG.
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In het hoofdstuk wordt ingegaan op de innovaties in de Europese gassector, met een speciale focus op de invoeding van groen gas (ook wel biomethaan) in het aardgassysteem. Er wordt een algemeen juridisch kader geschetst en er vindt een rechtsvergelijking plaats van de nationale rechtsordes aangaande Duitsland, Denemarken en Nederland.
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By transitioning from a fossil-based economy to a circular and bio-based economy, the industry has an opportunity to reduce its overall CO2 emission. Necessary conditions for effective and significant reductions of CO2-emissions are that effective processing routes are developed that make the available carbon in the renewable sources accessible at an acceptable price and in process chains that produce valuable products that may replace fossil based products. To match the growing industrial carbon demand with sufficient carbon sources, all available circular, and renewable feedstock sources must be considered. A major challenge for greening chemistry is to find suitable sustainable carbon that is not fossil (petroleum, natural gas, coal), but also does not compete with the food or feed demand. Therefore, in this proposal, we omit the use of first generation substrates such as sugary crops (sugar beets), or starch-containing biomasses (maize, cereals).
At gas stations, tetrahydrothiophene (THT) is added to odorless biogas (and natural gas) for quick leak detection through its distinctive smell. However, for low bio and natural gas velocities, evaporation is not complete and the odorization process is compromised, causing odor fluctuations and undesired liquid accumulation on the pipeline. Inefficient odorization not only endangers the safety and well-being of gas users, but also increases gas distribution companies OPEX. To enhance THT evaporation during low bio and natural gas flow, an alternative approach involves improve the currently used atomization process. Electrohydrodynamic Atomization (EHDA), also known as Electrospray (ES), is a technology that uses strong electric fields to create nano and micro droplets with a narrow size distribution. This relatively new atomization technology can improve the odorization process as it can manipulate droplet sizes according to the natural and bio gas flow. BiomEHD aims to develop, manufacture, and test an EHDA odorization system for applying THT in biogas odorization.
The Cashing Cashew project focuses on isolation and purification of Cashew Nut Shell Liquid (CNSL) from Cashew Nut Shells (CNS) in order to fully utilize this valuable by-product of the cashew nut production. Global cashew nut production is about 4 million mt/ tons/yr. Of the cashew nut, about 70 % is shell that is removed in processing and currently typically burned as a dirty and inefficient fuel or discarded as waste. This is not only creating an environmental issue but also wasting valuable by-products. The shell contains circa 20-30 % brown viscous liquid, Cashew Nut Shell Liquid (CNSL). This natural resin contains valuable chemical components, for example, cardanol, cardol, and anacardic acid. CNSL and its derivatives have several industrial uses as for example biobased additives, polymeric building blocks, and biodiesel. Part of the CNSL can be extracted during the roasting process prior to separating the shell and nut kernel. The shell waste still has a high CNSL concentration that can be isolated by solvents or pressing (expeller). Expeller process is simple and not capital-intensive; therefore it is commonly used. The main disadvantages of the method are the high energy consumption and that 3-5 % oil remains in the press-cake producing harmful gases in burning. Also, the resulting cake is too dense to be further processed to charcoal or other useful application. The objective of this project is to study the purification of the CNSL obtained from pyrolytic isolation to find the most efficient way of making use of the CNSL oil and the total Cashew Nut Shell biomass. An initial evaluation of potential applications is also performed.
