Energy & Green Tech
University of Delaware (UD) engineers have demonstrated a way to effectively capture 99% of carbon dioxide from air using a novel electrochemical system powered by hydrogen.
Feb 3, 2022
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3185
Engineering
Membrane technologies can provide efficient purification of unclear water sources to address a growing water shortage. However, when engineers develop state-of-the-art membranes, they are constrained by a lack of selectivity ...
Energy & Green Tech
In recent times, hydrogen has drawn significant attention as a potential clean energy resource as an alternative to fossil fuels. In particular, there has been active research and development of water electrolysis technology ...
Jan 28, 2022
2
517
Engineering
Umeå University researchers have made a breakthrough that may make hydrogen—a clean, CO2-free fuel—more affordable. The team has developed a new method that improves how hydrogen gas is produced from water and electricity, ...
Jun 8, 2023
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210
Energy & Green Tech
Hydrogen production takes place using natural gas as the raw material, combined with a very special ceramic membrane. Both hydrogen production and CO2 capture are achieved in a single step, which makes the method highly energy ...
Jul 28, 2022
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185
Energy & Green Tech
Proton exchange membrane fuel cells (PEMFCs) are power cells that can transform the chemical energy produced during the electrochemical reaction between hydrogen and oxygen into electrical energy. While these cells could ...
Energy & Green Tech
A federally funded research effort to revolutionize water treatment has yielded an off-grid technology that uses energy from sunlight alone to turn salt water into fresh drinking water. The desalination system, which uses ...
Jun 19, 2017
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1078
Energy & Green Tech
(Tech Xplore)—A team of researchers working at the National University of Singapore has developed a new hybrid redox flow battery (RFB) that they claim has ten times the energy density as conventional RFBs. In their paper ...
Electronics & Semiconductors
Imagine an iPad or a Kindle for the blind, with inflatable Braille that changes shape under a user's touch. A Cornell-led collaboration has made a crucial component for such a technology: A haptic array of densely packed ...
Oct 5, 2021
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491
Energy & Green Tech
A joint research team from the Korea Institute of Science and Technology (KIST), led by Dr. Kyung-guen Song from the KIST Water Cycle Research Center and Dr. Won-jun Choi from the KIST Center for Opto-Electronic Materials ...
Jul 22, 2020
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131
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.
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