A single-ligand ultra-microporous MOF for precombustion CO ₂ capture and hydrogen purification

Abstract

A single small-ligand–based ultra-microporous MOF showing high CO2 selectivity and PSA working capacity for H2 purification.

Finely Controlled Stepwise Engineering of Pore Environments and Mechanistic Elucidation of Water‐Stable, Flexible 2D Porous Coordination Polymers

“…To verify this result, we then performed dynamic CO 2 adsorption of NTU-22 (gas flow: 10 mL min À1 ). [8] NTU-22 maintains high crystallinity and gas uptake capacity in water heateda tr eflux for 15 days (Figure 7a nd S56). Importantly,a fter five cycles,w er educed equilibrium time from 10 to 1min, and extended from 10 to 30 min, in the sixth and eighth cycle, respectively ( Figure 5).…”

“…Assessmento ft he water stability of NTU-22i sacritical factor that determines the feasible applicationo fP CPs. [8] NTU-22 maintains high crystallinity and gas uptake capacity in water heateda tr eflux for 15 days (Figure 7a nd S56). To date, there is no report of a2 DP CP that preserves high crystallinity under such harsh conditions.…”

A highly stable metal‐organic framework with optimum aperture size for CO2 capture

“…28,29 Vaidhyanathan and coworkers exquisitely designed a MOF, Ni-(4-pyridylcarboxylate) 2 , with an aperture size of 3.5-4.8 Å , which exhibits high CO 2 /H 2 separation performance for precombustion CO 2 capture. 30 The underlying design principle of the above approach is that MOFs with ultrasmall pore sizes are endowed with strong van der Waals interactions with adsorbed gas molecules. In addition, a molecular sieve mechanism is also possible if only the smaller gas molecules can be accommodated within the cavity of porous materials while the larger ones will be rejected.…”

Water‐stable Adenine‐based MOFs with Polar Pores for Selective CO2 Capture

“…[17f] For example, the basicitya nd the small length of the PyC:4 -Pyridine carboxylate or isonicotinatew as well exploitedi nt he construction of ultra-microporous MOF with exceptionally high CO 2 selectivities and sorption-energetics. [19] In-dependently, [20] Rosi and co-workerss howed that adeninate MOFs could have high CO 2 capacity,w ith ah igh heat of adsorptionf or CO 2 (33.1 KJ mol À1 ). The Lewis basic N-sites of amino and pyrimidine groups played ak ey role in gaining CO 2 selectivity.L ia nd co-workersr eported an Zn-adeninate MOF, [21] in whichn itrogens are positioned uniformly along the pore.…”