Separation/purification of ethylene from an acetylene/ethylene mixture in a pillared-layer porous metal–organic framework

Abstract

Here we report the synthesis, structure and porous properties of a 3D pillared-layer porous framework of Mn(ii)-Mn(iii), {[Mn(bipy)(HO)][Mn(CN)]·2(bipy)·4HO} (1). The guest-removed framework (1a) shows significant uptake of CH, whereas it excludes the other two C2 hydrocarbons (CH and CH). Furthermore, excellent separation proficiency for CH from a mixture of CH and CH (1 : 99, v/v) is realized in a breakthrough column experiment under ambient conditions.

Sub‐5 nm Intermetallic Nanoparticles Confined in Mesoporous Silica Wells for Selective Hydrogenation of Acetylene to Ethylene

“…However, trace amounts of acetylene (around 1 %) generated during steam cracking can poison the catalyst and even lower the quality of the final polymeric product formed, necessitating the removal of this trace acetylene quantity. Industrially, acetylene removal has been achieved by the semi‐hydrogenation of acetylene to ethylene . Simulating industrial conditions for the reaction on a lab‐scale, we used a feed mixture of 0.5 % C 2 H 2 , 50 % C 2 H 4 , 5 % H 2 in He for a total flow of 30 mL/min.…”

Metal-Organic Frameworks: Synthetic Methods and Potential Applications

“…At 296 K and 1 atm, the acetylene and ethylene uptake amount of UTSA-100 are 95.6 and 37.2 cm 3 ·g −1 , respectively, which is much higher than that of M’MOF-3 [ 84 , 85 ]. Other examples of MOFs exhibiting high C 2 H 2 uptake are UTSA-300 (3.41 mmol·g −1 at 273 K and 1 bar) [ 86 ], SIFSIX-1-Cu (8.50 mmol·g −1 at 298 K and 1 bar) [ 87 ], [Mn 3 (bipy) 3 (H 2 O) 4 ][Mn(CN) 6 ]·2(bipy)·4H 2 O (3.2 mmol·g −1 at 27–83 K and 1 bar) [ 88 ], and NOTT-300 (6.34 mmol·g −1 at 293 K and 1 bar) [ 89 ]. In addition, the raw propylene (C 3 H 6 ) product contains trace impurity of propyne (C 3 H 4 ), which is highly undesirable.…”

Construction of a Stable Crystalline Polyimide Porous Organic Framework for C2H2/C2H4 and CO2/N2 Separation

“…The C 2 H 2 impurity may deactivate catalysts and terminate the polymerization of C 2 H 4 . [3] Therefore, removing C 2 H 2 from crude C 2 H 4 is vital.C urrent methods for separation of C 2 H 2 from crude C 2 H 4 ,s uch as cryogenic distillation and partial hydrogenation, are both energy-and cost-intensive; [4] thus, developing an energy-efficient and environmentally friendly method is desirable. The combustion products CO 2 and N 2 are released in large amountsi nt he generation of electricity in natural-gas-and coal-fired powers tations.…”

“…[6][7][8][9][10][11][12][13][14][15] Some MOFs have been documented to be energy-efficient and environmentally friendly adsorbentsc apable of C 2 H 2 /C 2 H 4 and CO 2 /N 2 separation. [1,2,4,[7][8][9][10][11][12][13][14][15][16] Porous organic frameworks (POFs) or covalent organic frameworks (COFs), [17][18][19][20][21][22][23][24] an emerging family of porous materials, have attracted interest from the scientific communityf or their potentiali nm olecular separation, [25,26] catalysis, [27][28][29] drug delivery, [30,31] energy storage, [32][33][34][35] and many other applications. [36][37][38][39][40][41] In 2005, in pioneering work, crystalline COF-1 and COF-5 were fabricated b...…”

“…Recently, metal–organic frameworks (MOFs) have demonstrated great potential in gas capture and separation, which benefit from their open metal sites and controllable pore sizes . Some MOFs have been documented to be energy‐efficient and environmentally friendly adsorbents capable of C 2 H 2 /C 2 H 4 and CO 2 /N 2 separation …”