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oai:figshare.com:article/33943316 2026-09-19T19:07:33Z category_4 category_146 category_12 category_14 category_16 category_24 category_873 category_39 category_106 category_502 category_61 category_64 category_135 portal_63 item_type_2 month_year_09_2026

Enhanced CO₂ Hydrate Formation Using l‑methionine and SiO₂ Nanoparticles as Combined Kinetic Promoters Thanh Van Pham (25076654) Chengzhuo Li (8664430) Wanqing Wu (796508) Min Du (292028) Haokun Shi (22446520) Yuanyuan Guo (50344) Qinggong Zheng (21260313) Biochemistry Space Science Cell Biology Molecular Biology Physiology Evolutionary Biology Chemical Sciences not elsewhere classified Ecology Science Policy Astronomical and Space Sciences not elsewhere classified Developmental Biology Cancer Computational Biology morphological observations showed dissociation cycles showed direct morphological observation combined mean performance climbing growth route climbing growth induced assisted water supply sustained hydrate growth climbing hydrate layer cycle evaluation based appropriate concentration range formation kinetics within bulk hydrate formation accelerate hydrate formation five consecutive formation reusable promoter system 2 </ sub hydrate formation promoter concentration subsequent five auxiliary promoter reuse stability results demonstrate pathway dominated optimum single nanoparticle systems kinetic measurements induction time formulation selected closely associated based co acted mainly >< sub 100 wt 10 wt Hydrate-based CO₂ storage requires green kinetic promoters that can accelerate hydrate formation while maintaining favorable growth morphology and reuse stability. In this study, l-methionine (l-Met) and l-Met + SiO₂ nanoparticle systems were investigated for CO₂ hydrate formation through kinetic measurements and direct morphological observation. l-Met significantly promoted hydrate formation, with 0.100 wt % identified as the optimum single-promoter concentration. The enhancement was closely associated with the formation of a porous wall-climbing hydrate layer, which improved gas–liquid contact and sustained hydrate growth through capillary-assisted water supply. Introducing SiO₂ nanoparticles into the optimized l-Met system further enhanced the formation kinetics within an appropriate concentration range, with the 0.100 wt % l-Met + 0.10 wt % SiO₂ formulation selected for the subsequent five-cycle evaluation based on the combined mean performance of induction time, final normalized gas consumption, and <i>t</i>₉₀. Morphological observations showed that SiO₂ did not redirect the wall-climbing growth induced by l-Met toward a pathway dominated by bulk hydrate formation; instead, it acted mainly as an auxiliary promoter by supplying additional heterogeneous nucleation sites within the existing wall-climbing growth route. Five consecutive formation-dissociation cycles showed that the combined system maintained favorable hydrate-forming performance without fresh promoter addition. These results demonstrate that l-Met + SiO₂ is an effective and reusable promoter system for CO₂ hydrate formation. 2026-09-19T00:00:00Z Dataset Media 10.1021/acs.energyfuels.6c03272.s003 https://figshare.com/articles/media/Enhanced_CO_sub_2_sub_Hydrate_Formation_Using_l_methionine_and_SiO_sub_2_sub_Nanoparticles_as_Combined_Kinetic_Promoters/33943316 CC BY-NC 4.0