Efficiency analysis and operating condition optimization of solid oxide electrolysis system coupled with different external heat sources

Cui, Tonghui; Zhu, Jianzhong; Lyu, Zewei; Han, Minfang; Sun, Kaihua; Liu, Yang; Ni, Meng

doi:10.1016/j.enconman.2023.116727

Cited by 12 publications

(1 citation statement)

References 46 publications

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“…Both technologies operate at 60–90 °C. , SOEC, however, operates at high temperatures (700–850 °C). − We consider an operation of the SOEC to be performed below thermoneutral conditions. While opportunities exist for producing the HT steam via heat integration, , we assume NG as the energy source. The main parameters concerning efficiency, CAPEX, and stack lifetime of each electrolyzer technology are summarized in Table .…”

Section: Methodsmentioning

confidence: 99%

Cost-Effective Locations for Producing Fuels and Chemicals from Carbon Dioxide and Low-Carbon Hydrogen in the Future

Allgoewer,

Becattini,

Patt

et al. 2024

Ind. Eng. Chem. Res.

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This study investigates the cost and climate change mitigation potentials of fuels and chemicals from CO 2 and lowcarbon hydrogen produced in four sites with favorable conditions for renewable energy generation, located in Iceland, The Netherlands, Spain, and Chile. We investigate eight different chemicals, i.e., Fischer−Tropsch fuels, methanol, methane, dimethyl ether, ammonia, urea, olefins, and aromatics, considering two temporal horizons, i.e., the near future (by 2035) and the longterm future (post-2035). For hydrogen production, we explore alkaline water electrolysis, proton exchange membranes, and solid oxide electrolyzer cells. As carbon feedstock, we focus on CO 2 produced via low-temperature solid adsorption direct air capture (LT DAC). Additionally, we investigate CO 2 from high-temperature aqueous absorption DAC and point-source capture. We find that optimal renewable energy sites like the ones considered in this study have the potential to offer competitive costs for carbon capture and utilization (CCU) processes. These routes, when compared to the current price of their fossil-based counterparts, could achieve long-term future cost ratios ranging from 1 to 6.5 times, with a cost per ton of CO 2 eq avoided estimated between 150 and 750 €/t. In conclusion, this research provides valuable insights into the techno-economic feasibility of relying on fuels and chemicals via CCU processes as an energy policy strategy.

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