Energy & Green Tech
Researchers at the Fraunhofer-Gesellschaft have developed a technology for the energy-efficient and economic separation of hydrogen from natural gas. This membrane technology makes it possible for the two substances to be ...
Apr 1, 2021
1
32
Engineering
Two researchers at the Chinese University of Hong Kong have developed a new membrane design that prevents crossover in polysulfide redox flow batteries. In their paper published in the journal Nature Energy, Zhejun Li and ...
Engineering
The purification of various water resources, such as rain, seawater, groundwater, river water, sewage, and wastewater, into potable or usable water is a high-energy process. But what if electricity could be generated during ...
Feb 23, 2023
0
71
Engineering
The separation of light hydrocarbon mixtures is among the most important petrochemical and industrial processes. This process is currently regarded as highly energy intensive, as it has so far been carried out using conventional ...
Energy & Green Tech
In the quest for the perfect alternative for gas-powered vehicles, there have been a lot of contenders over the years. When it comes to public perception, battery electric vehicles (BEVs) are some of the most widely known. ...
Mar 12, 2019
1
154
Robotics
A team of researchers working at the Chinese Academy of Sciences has developed an electronic skin that is sensitive enough to detect changes in air moving, falling drops and moving ants. In their paper published in the journal ...
Energy & Green Tech
Oak Ridge National Laboratory scientists have developed a crucial component for a new kind of low-cost stationary battery system utilizing common materials and designed for grid-scale electricity storage.
Jul 25, 2018
0
56
Energy & Green Tech
Generating energy from the difference in salt concentration between sea water and river water sounds like magic, yet it really works! Blue energy, as this rather obscure form of sustainable power is commonly known, has huge ...
Jun 10, 2021
0
13
Engineering
In a new study published in the journal Frontiers of Environmental Science & Engineering, researchers from Northwestern Polytechnical University introduced a revolutionary SMEC method for uranium recovery from wastewater. ...
Dec 15, 2023
0
56
Engineering
The ocean isn't just impacted by climate change—it may also be part of the solution to reversing it.
Jul 24, 2023
0
20
A membrane is a layer of material which serves as a selective barrier between two phases and remains impermeable to specific particles, molecules, or substances when exposed to the action of a driving force. Some components are allowed passage by the membrane into a permeate stream, whereas others are retained by it and accumulate in the retentate stream.
Membranes can be of various thickness, with homogeneous or heterogeneous structure. Membrane can also be classified according to their pore diameter. According to IUPAC, there are three different types of pore size classifications: microporous (dp < 2nm), mesoporous (2nm < dp < 50nm) and macroporous (dp > 50nm). Membranes can be neutral or charged, and particles transport can be active or passive. The latter can be facilitated by pressure, concentration, chemical or electrical gradients of the membrane process. Membranes can be generally classified into three groups: inorganic, polymeric or biological membranes. These three types of membranes differ significantly in their structure and functionality.
This text uses material from Wikipedia, licensed under CC BY-SA
