Argonne National Laboratory (ANL) and the National Energy Technology Laboratory (NETL) are developing dense membranes for separating hydrogen from mixed gases, particularly product streams generated during coal gasification, methane partial-oxidation, and water-gas shift reactions. Hydrogen separation with these membranes is nongalvanic, i.e., it does not use electrodes or an external power sup...

Graphene is a well-known two-dimensional material that exhibits preeminent electrical, mechanical and thermal properties owing to its unique one-atom-thick structure. Graphene and its derivatives (e.g., graphene oxide) have become emerging nano-building blocks for separation membranes featuring distinct laminar structures and tunable physicochemical properties. Extraordinary molecular separatio...

The hydrothermal stability of molecular sieve silica (MSS) membranes is an area of increasing research interest, in particular for applications such as membrane reactors and membrane gas separation of process streams containing hot steam. In these applications, gas streams are likely to contain water vapor, which reacts with the hydrophilic sites in the silica thin films resulting in chemical a...

Two-dimensional (2D) materials bring a great opportunity to fabricate molecular sieving membranes that can potentially break the permeability-selectivity trade-off. Although 2D laminar with interlayer nanochannels as channel were widely studied, for most of reported membranes, it is challenge highly ordered mass transport. Herein, we report novel kind black phosphorene membrane which made from ...

The application of membranes in various industries is one of the most urgent needs to reduce energy consumption and environmental pollutants as well as low investment costs in the process of separation. In this investigation, the optimization of effective parameters for separation of gas mixture of CH4, CO2, O2 and N2 is studied by modified poly(4-met...

We report on an electrochemically driven CO2 separation process employing commercial anion exchange membranes to directly remove from a dilute gas mixture and transport it across cell. This m...

Matrimid®5218 hollow fiber membranes were prepared using the dry-wet spinning process. The transport properties were measured with pure gases (H2, CO2, N2, CH4 and O2) and with a mixture (30% CO2 and 70% N2) in dry and wet conditions at 25 °C, 50 °C, 60 °C and 75 °C and up to 600 kPa. Interesting values of single gas selectivity up to 60 °C (between 31 and 28 for CO2/N2 and between 33 and 30 fo...

A gas permeation model (Coupling Model) has been developed which has the flexibility to be used for different membrane module configurations. The aim of this work is to predict the performance of a single stage gas separation process using membranes and provide a comprehensive description of process parameters like flow rates, composition, stage cut and stream pressure. The significant feature ...