논문 해외 국제전문학술지(SCI급) Reversible Ni Exsolution for Syngas Production via Reduction-Free Regeneration: From Mechanism to Economic/Environmental Viability
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2026-10
- 저자명 Choi, S.-B., Cho, E., Kim, H. S., Jeon, J., Yu, Y. J., Park, G.-J., Kim, J.-C., Park, K.,* Cho, S. J.,* and Ko, C. H.*
- 학술지명 Chemical Engineering Journal
- 발행처명 ELSEVIER
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 10
홈페이지논문 초록 (Abstract)
Dry reforming of methane (DRM) is hindered by catalyst deactivation and the high
costs of conventional hydrogen-reduction-based regeneration. In this study, we
propose a novel Ni-substituted SrTiO3 (STN) catalyst system enabling full activity
recovery via a simplified reduction-free DRM (RF-DRM) scenario. This study employs a
multidisciplinary approach to bridge atomic-level catalyst dynamics and industrial-scale
sustainability through a multi-scale evaluation. At the atomic scale, spectroscopic
analysis and CO2 pulse tests reveal a structural memory effect where lattice-confined
Ni3+ and high oxygen mobility drive reversible Ni exsolution and self-regeneration.
This microscopic resilience facilitates process-level innovation by eliminating external
hydrogen and minimizing downtime. To evaluate systemic impact, techno-economic
and life-cycle assessments (TEA/LCA) were integrated, revealing an additional 328.4
ton/year of syngas production (1.9% increase) and approximately 22.19 ton H2/year of
hydrogen savings (2.0% increase) under identical operating conditions, together with
6.2% reduction of levelized cost of hydrogen and a 19% reduction in global warming
potential. The economic and environmental benefits are mainly caused by the RF-DRM
operation. By reconciling fundamental materials science with rigorous process
evaluation, this framework demonstrates how atomic-scale lattice design dictates
macroscopic economic and environmental viability, offering a new paradigm for
sustainable carbon capture and utilization.