Facile preparation of porous polybenzimidazole networks and adsorption behavior of CO₂gas, organic and water vapors

A novel nitrogen rich porous aromatic framework for hydrogen and carbon dioxide storage

“…The pore size of the optimized geometry is found to be 1.05 nm which is in good 50 agreement with the experimental pore size. The smaller pores revealed from the experimental data should be related to the deviation from the ideal structure given in Scheme 1 (i.e., pores formed by cross coupling of three building blocks instead of four and/or Br atoms attached to the ortho-or meta-positions instead 55 of the para-position in the benzene ring).…”

“…All low pressure (P ≤ 1atm) adsorption and desorption isotherms of hydrogen, nitrogen and CO 2 were measured by a Quantachrome AS1C. The measurement accuracy and repeatability of the Quantachrome AS1C were 50 verified with the Quantachrome standard reference material (SARM-2012) before the measurements. The test value was within the reproducibility limit (± 5 %) of the expected value.…”

“…4,21,22 Furthermore, an ideal hydrogen storage material should have high gravimetric (55 g H 2 /kg system) and volumetric density (40 g H 2 /L system ) near ambient temperature. 8 Porous materials can only achieve high storage capacity at cryogenic temperatures (77 K) because of the weak 50 interaction (low adsorption enthalpy due to physisorption) of hydrogen molecules with the porous material. Hydrogen storage capacity of a material is a function adsorption enthalpy, pore size/volume and surface area.…”

Microporous Organic Polymers for Carbon Dioxide Capture

“…However, all the values are lower than those of BILP-1 network reported by Rabbani and El-Kaderi [79]. Recently, Yu et al [90] also synthesized porous poly(benzimidazole) networks PBI-1 and PBI-2 through one-step polycondensation of 3,3′-diaminobenzidine with tris(4-carboxyphenyl)amine (TCA, Fig. 5.11b) and tetrakis(4-carboxyphenyl)silane (TCS, Fig.…”

Facile synthesis of a thermally stable imine and benzimidazole functionalized nanoporous polymer (IBFNP) for CO2 capture application

“…(a) has a sharp band at 1620 cm −1 , which is the characteristic band for imine (C = N stretching vibration) . The bands at 1450 and 1300 cm −1 can be assigned for skeleton stretching vibration of benzimidazole ring and the band at 3217 cm −1 is the characteristic band for hydrogen bonded N‐H stretching for benzimidazole . The band at 2930 cm −1 is due to alkene C‐H stretching of imine .…”