Related Experiment Video
Updated: Jan 26, 2026

Hydrogen Production and Utilization in a Membrane Reactor
Published on: March 10, 2023
Improved Hydrogen Separation Using Hybrid Membrane Composed of Nanodiamonds and P84 Copolyimide
Alexandra Pulyalina1, Galina Polotskaya2,3, Valeriia Rostovtseva4
1Institute of Chemistry, Saint Petersburg State University, Universitetskiy pr. 26, 198504 Saint Petersburg, Russia. alexandra.pulyalina@gmail.com.
Abstract:
Membrane gas separation is a prospective technology for hydrogen separation from various refinery and petrochemical process streams. To improve efficiency of gas separation, a novel hybrid membrane consisting of nanodiamonds and P84 copolyimide is developed. The particularities of the hybrid membrane structure, physicochemical, and gas transport properties were studied by comparison with that of pure P84 membrane. The gas permeability of H₂, CO₂, and CH₄ through the hybrid membrane is lower than through the unmodified membrane, whereas ideal selectivity in separation of H₂/CO₂, H₂/CH₄, and CO₂/CH₄ gas pairs is higher for the hybrid membrane. Correlation analysis of diffusion and solubility coefficients confirms the reliability of the gas permeability results. The position of P84/ND membrane is among the most selective membranes on the Robeson diagram for H₂/CH₄ gas pair.
More Related Videos
07:58Bio-inspired Polydopamine Surface Modification of Nanodiamonds and Its Reduction of Silver Nanoparticles
Published on: November 14, 2018
11:25Hybrid Clear/Blue Native Electrophoresis for the Separation and Analysis of Mitochondrial Respiratory Chain Supercomplexes
Published on: May 19, 2019
Related Concept Videos
Hydrogen Bonds
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
Hydrogen Bonds
Hybridization of Atomic Orbitals I
Hybridization of Atomic Orbitals II
Hybrid Zones
Reduction of Alkenes: Catalytic Hydrogenation
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...