Ligand Tailoring Strategy of a Metal–Organic Framework for Optimizing Methane Storage Working Capacities

Abstract

Methane, as the main component of natural gas, shale gas, and marsh gas, is regarded as an ideal clean energy to replace traditional fossil fuels and reduce carbon emissions. Porous materials with superior methane storage capacities are the key to the wide application of adsorbed natural gas technology in vehicle transportation. In this work, we applied a ligand tailoring strategy to a metal–organic framework (NOTT-101) to fine-tune its pore geometry, which was well characterized by gas and dye sorption measurements. High-pressure methane sorption isotherms revealed that the methane storage performance of the modified NOTT-101 can be effectively improved by decreasing the unusable uptake at 5 bar and increasing the total uptake under high pressures, achieving a substantially high volumetric methane storage working capacity of 190 cm3 (STP) cm–3 at 298 K and 5–80 bar.

Theoretical investigation of C1–C4 hydrocarbons adsorption and separation in a porous metallocavitand

“…Our results are compared with the existing benchmark reports (last three years) on the MOF-based hydrocarbon adsorption under ambient conditions and the comparison is listed in Table S5. † The CH 4 adsorption in PPX is remarkable with 2.37 mmol g −1 and only NOTT-101 (5.93 mmol g −1 )/-101-IPA (5.98 mmol g −1 ) 49 achieved higher than these limits. The C 2 H 2 adsorption in PPX is 2.80 mmol g −1 , although the adsorption is not very good but performs better than UPC-98, 50 UMCM-151, 51 PFC-5, 52 FIR-125, 53 NUM-9a, 54 JLU-Liu45, 55 Zr-OBBA, 55 PFC-1/-2, 56 NUM-7, 57 Cu–F-pymo, 58 MOF 1/MOF 2, 59 UPC-99, 60 NbU-1.…”

High Pore Volume Hyper-Cross-Linked Polymers via Mixed-Solvent Knitting: A Route to Superior Hierarchical Porosity for Methane Storage and Delivery

“…Indeed, a hierarchical porous structure endows the adsorbent with a mixed micro/meso-/macroporosity to increase the pore volume, which benefits the methane uptake at medium-to-high pressures while minimizing the low-pressure uptake, leading to a superior methane working capacity and delivery rate, the more essential parameters in practical applications. − Methane is known to be a nonpolar molecule. Its physisorption on the pore walls of the adsorbent, based on van der Waals forces, is mainly affected by the pore size distribution .…”

Postsynthetic Metalation of a New Metal–Organic Framework To Improve Methane Working Storage Capacity

“…Those metalated MOFs were found to be promising candidates for methane uptake at 80 bar and 298 K. The importance of the postsynthetic metalation strategy in methane storage at high pressure is highlighted by the fact that the methane uptake working capacity of the parent MOF-700 only reached 137 cm 3 (STP) cm –3 while MOF-701, MOF-702, and MOF-703 displayed high methane uptake working capacities of 206, 167, and 181 cm 3 (STP) cm –3 , respectively. It is important to note that these findings are among the highest values reported for any adsorbent material to date. , …”