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· Audi will work with the two companies to build synthetic diesel in Laufenburg, Sweden
According to foreign media reports, Audi is systematically building its strategy for synthetic fuel (e-fuels). The company has partnered with partner Ineratec GmbH and Energiedienst Holding AG to establish a new pilot plant in Laufenburg, in Canton Aargau, Sweden for the production of synthetic diesel (e-diesel). Electricity will be obtained from the renewable energy division of hydroelectric plants, the first of its kind for Audi. In addition, the facility's planned capacity will reach 400,000 liters / year (about 105,669 US gallons / year).
For many years, Audi has been researching how to use carbon dioxide to make environmentally friendly synthetic natural gas, synthetic gasoline or synthetically produced biodiesel fuel. At present, Audi is actively working to achieve mass production of synthetic diesel.
Audi's synthetic diesel fuels produce almost exclusively neutral carbon dioxide during normal engine operation. To produce the fuel, the plant uses the “power-to-liquid†principle to convert excess electricity from hydroelectric power into synthetic fuel. In addition, the electricity generated by the hydropower station will use electricity to produce hydrogen and oxygen by means of electrolysis.
Carbon dioxide will be mixed with hydrogen to achieve a power-to-liquid conversion process in two steps. First, carbon dioxide and hydrogen will be converted to synthesis gas (syngas) in Ineratec's reverse water gas shift (RWGS) reactor. Subsequently, the Fischer-Tropsch reactor will use synthetic gas to produce Audi's synthetic diesel and paraffin, which will also be used in other applications in the automotive industry.
Fischer-Tropsch synthesis products do not contain aromatics and sulfur compounds. Carbon dioxide can be obtained from atmospheric or biological exhaust gases and Audi synthetic fuels.
At the heart of the Ineratec synthesis reactor is its microstructure, which provides an extremely large surface area for heat and mass transport to minimize the effects on reactor and catalyst performance. In addition, the compact plant can perform high-efficiency exothermic reactions such as Fischer-Tropsch synthesis efficiently and safely.
According to Ineratec, the characteristics of its reactor are as follows:
1. Compact design due to its microstructure technology
2. The synthesis gas conversion rate of each reactor is high, and the productivity of each reactor is also high.
3. Excellent temperature control
4. Fast start-up time and short downtime
5. Cost savings for decentralized applications
Audi and its partners plan to produce the first batch of synthetic diesel as soon as next year. Audi and the two partners of the project, Ineratec and Energiedienst AG, plan to submit the planning application for the production facility in the next few weeks, which is expected to begin construction in early 2018.