Details

Autor(en) / Beteiligte

• Gao, Ningshengjie
• Quiroz-Arita, Carlos
• Diaz, Luis A.
• Lister, Tedd E.

Titel

Intensified co-electrolysis process for syngas production from captured CO2

Ist Teil von

• Journal of CO2 utilization, 2021-01, Vol.43, p.101365, Article 101365

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •Isothermal CO2 capture and utilization process was demonstrated.•Syngas can be produced in an intensified co-electrolysis unit at low temperature.•Process intensification allow significant reduction in unit operations.•CO2 conversions 70 % can be achieved in the intensified electrolyzer. CO2 reduction to syngas provides a way of ameliorating carbon footprint and storing energy in high-energy-density and versatile feedstock. This current work explores the isothermal integration of CO2 capture with an intensified unit operation for the reduction of CO2 and capture media regeneration. Intensified captured CO2 co-electrolysis (ICC) to syngas (H2:CO ratio of 2) with low CO2 content (<10 %) was demonstrated with over 70 % CO2 conversion at a current density up to 0.20 A/cm2 for 14 h of operation. Integration of the co-electrolysis unit with CO2 capture was performed feeding pure and diluted CO2, for which CO2 conversions>65 % were observed. Performance of the capture unit becomes critical to maintain syngas ratios (SR). Technology feasibility was assessed through comparative techno-economic and life cycle analysis showing that process intensification enables competitive performance, even at the higher energy consumption featured at the current state of the technology. This because several unit operations can be avoided. LCA also showed that based on the current US electricity mix the reduction of life cycle CO2 emissions is possible at scenarios observed with 0.15 A/cm2 to accomplish a carbon-negative technology.