Metal-organic frameworks for C2H2/CO2 separation: Recent development

A viologen-based Cd(ii) coordination polymer as a multifunctional platform for photochromism, chemochromism and a broad range of fluorescence pH sensing

“…Coordination polymers (CPs), which belong to a class of hybrid materials with well-defined crystalline structures composed of metal nodes and organic linkers, have drawn increasing attention and emerged as promising materials in the fields of chemical sensing, 4,5 gas adsorption and separation 6–8 and heterogeneous catalysis. 9–11 What is more, the functionality of CPs could be readily tuned by modifying the inorganic and organic building units, especially the latter.…”

Highly Efficient CO2/C2H2 Separation by Porous Graphene via Quadrupole Gating Mechanism

“…Some flexible materials can sieve C 2 H 2 /CO 2 based on the different gate-opening pressure. ,, However, the practical separation performance is usually unsatisfactory due to co-adsorption after the gate-opening. Therefore, although there are numerous investigations exploiting porous material for C 2 H 2 /CO 2 separation, − it is still a grand challenge to separate C 2 H 2 /CO 2 with satisfying selectivity and permeance (a pair of trade-offs), e.g., high permeance usually compromises selectivity while high selectivity usually fails to yield the desired permeance. , …”

“…Therefore, although there are numerous investigations exploiting porous material for C 2 H 2 /CO 2 separation, 22−27 it is still a grand challenge to separate C 2 H 2 /CO 2 with satisfying selectivity and permeance (a pair of trade-offs), e.g., high permeance usually compromises selectivity while high selectivity usually fails to yield the desired permeance. 28,29 On the other hand, membrane separation, particularly based on 2D porous materials, is also an energy-efficient technology for gas separation. 30−33 Membrane separation is usually dependent on the fine-tuned pore size of a designed membrane and the molecular size difference of gases to be separated.…”

Separation of High-Purity C2H2 from Binary C2H2/CO2 Using Robust Al-Based MOFs Comprising Nitrogen-Containing Heterocyclic Dicarboxylate

“…Acetylene (C 2 H 2 ) serves as a crucial feedstock in the petrochemical industry, essential for the production of a wide range of chemicals and polymers. 1,2 Additionally, it finds extensive utility as a fuel for gas-welding and cutting processes, accounting for a notable 20% of the total global consumption. 2 The primary source of C 2 H 2 is derived from the cracking of petroleum, coal, or coal-derived coke, as well as the partial combustion of methane (CH 4 ), resulting in crude C 2 H 2 that contains CO 2 impurities.…”

“…Acetylene (C 2 H 2 ) serves as a crucial feedstock in the petrochemical industry, essential for the production of a wide range of chemicals and polymers. , Additionally, it finds extensive utility as a fuel for gas-welding and cutting processes, accounting for a notable 20% of the total global consumption . The primary source of C 2 H 2 is derived from the cracking of petroleum, coal, or coal-derived coke, as well as the partial combustion of methane (CH 4 ), resulting in crude C 2 H 2 that contains CO 2 impurities. , Therefore, cryogenic distillation or extraction with an amine or basic solution is required to obtain a C 2 H 2 product with high purity levels exceeding 99.95%.…”