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Hybrid membranes composed of a polyimide combined with porous nanoparticles including carbons, metal organic frameworks and a porous organic polymer have been evaluated.
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Carbon dioxide (CO2) capture remains a priority in many countries as the world seeks to address climate change. In particular, the most recent report from the Intergovernmental Panel on Climate Change shows that geological storage of carbon dioxide is required for all scenarios that can meet 430 - 550 ppm CO2 atmospheric concentrations.
Membrane technology is one approach being investigated globally for the cost-effective capture of the carbon dioxide. However, to be successful, the membrane materials require high gas permeability and selectivity as well as long-term performance stability. Although a large number of gas separation membrane materials have been reported for CO2 capture in the last few decades, most have been tested under ideal conditions. However, real industrial gas streams contain impurities such as water vapor, hydrogen sulfide, sulfur dioxide and nitrogen oxide. We have investigated the resilience of hybrid mixed matrix membranes in the presence of these impurities. We found that the hybrid membranes prepared using porous organic polymer nanoparticles were resilient to these impurities, whereas those containing metal organic framework nanoparticles were less stable. This means that they can be effective in gas separation applications such as natural gas sweetening, biogas purification and post-combustion carbon capture, when these acidic gases are present. These results will allow scientists and engineers to select the right materials for these applications.
Researchers develop method to improve skeleton of common chemicals
Every chemical, from the simplest to the most complex, have a structural skeleton of atoms. The atoms can be added or removed to transform the chemical into different types, for use in different applications. For many pharmaceutical and agricultural chemicals, the skeleton consists of a mul ... more
Researchers develop chemical reaction method for more efficient drug production
Researchers at Tokyo University of Agriculture and Technology (TUAT) in Japan and Mount Allison University in Canada have developed a more efficient method to produce the building blocks needed for antibiotics and cancer treatment drugs. The building blocks the researchers set out to better ... more
Researchers take two steps toward green fuel
An international collaboration led by scientists at Tokyo University of Agriculture and Technology (TUAT) , Japan, has developed a two-step method to more efficiently break down carbohydrates into their single sugar components, a critical process in producing green fuel. The breakdown proce ... more
Nano-microscope gives first direct observation of the magnetic properties of 2D materials
Australian researchers and their colleagues from Russia and China have shown that it is possible to study the magnetic properties of ultrathin materials directly, via a new microscopy technique that opens the door to the discovery of more two-dimensional (2D) magnetic materials, with all so ... more
Nanoscale engineering transforms particles into 'LEGO-like' building blocks
Led by the University of Melbourne the work holds promise for micro and nano scale applications including drug delivery, chemical sensing and energy storage. Frank Caruso, Professor and ARC Australian Laureate Fellow, Department of Chemical and Biomolecular Engineering said that the team na ... more
World-first pinpointing of atoms at work for quantum computers
Scientists can now identify the exact location of a single atom in a silicon crystal, a discovery that is key for greater accuracy in tomorrow's silicon based quantum computers. It's now possible to track and see individual phosphorus atoms in a silicon crystal allowing confirmation of quan ... more
