Simulation and evaluation of a process concept for the generation of synthetic fuel from CO2 and H2. (November 2015)

• Record Type: Journal Article
• Authors: König, Daniel H.; Baucks, Nadine; Dietrich, Ralph-Uwe; Wörner, Antje
• Is Part Of: Energy. Volume 91(2015)
• Page Start: 833
• Page End: 841
• Publication Date: 2015-11
• Subjects: Power-to-Liquid -- Process simulation -- Synthetic fuels -- CO2 utilization; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2015.08.099
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: Future aviation, shipping and heavy load transportation will continue to depend on energy carriers with a high energy density. The Power-to-Liquid technology is an approach to produce synthetic hydrocarbons, which fulfill this requirement. The proposed concept is based on H2 from electrolysis, which reacts with CO2 via the reverse water-gas shift reaction to syngas. Syngas is then synthesized to liquid hydrocarbons by Fischer-Tropsch synthesis. A downstream product separation and upgrading section allows the production of defined fractions for specific applications. A flowsheet process model is build and heat integration is conducted. The input capacity is set to 100 MW LHV of H2 . A total amount of 1260 bbl / d liquid hydrocarbons (67.1 MW LHV ) is generated. The carbon conversion and the Power-to-Liquid efficiency, which is defined as the fraction of the electrical energy chemically bound into liquid hydrocarbons, are identified as the parameters to evaluate the overall process performance. The Power-to-Liquid efficiency is found to be 43.3%. The carbon conversion rate of 73.7% indicates the exploiting of the introduced CO2 . Highlights: Process model of the generation of synthetic fuels from CO2, power and H2 O developed. 100 MW LHV of H2 yields 1260 bbl / d of liquid hydrocarbon product. A Power-to-Liquid efficiency of 43.3% arises. Heat integration can reduce the energy losses to 25.6%.