用于天然气利用的MOF膜中的不对称孔隙窗口
Sheng Zhou1,2,3, Osama Shekhah1,2,3, Adrian Ramírez1,4,5
1Division of Physical Science and Engineering (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, Kingdom of Saudi Arabia.
Nature
|June 22, 2022
概括
一种新的金属有机框架 (MOF) 膜有效地从天然气中去除. 这项创新为甲净化提供了显著的成本降低,提高了能源效率.
科学领域:
- 材料科学
- 化学工程
- 分离科学
背景情况:
- 天然气需要高纯度的甲作为原料.
- 由于它对加热价值的影响,去除是至关重要的.
- 由于具有相似的物理性质,将与甲分离是具有挑战性的.
研究的目的:
- 开发一种能效的从天然气中去除的过程.
- 设计一种具有选择性透性的膜.
- 评估新分离技术的经济可行性.
主要方法:
- 混合连接器金属有机框架 (MOF) 膜 (Zr-fum67-mes33-fcu-MOF) 的制造.
- 修改孔隙形状以产生不对称性.
- 高压气体透实验 (高达50巴)
- 技术经济分析将MOF膜与传统方法进行比较.
主要成果:
- 这种MOF膜对比甲具有很高的选择性.
- 在实际压力下实现了创纪录的透度.
- 这种膜有效地去除了和二氧化碳.
- 技术经济分析显示,成本降低的潜力很大.
结论:
- 开发的MOF膜为从天然气中去除提供了高度选择性和透性的解决方案.
- 这项技术为冷蒸和氨基洗提供了可观的成本节约替代方案.
- 工程孔隙结构是实现高效甲净化的关键.
相关概念视频
01:25Aquaporins
5.0K
Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
5.0K
01:15Potentiometry: Membrane Electrodes
773
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
773
01:19Membrane Asymmetry Regulating Transporters
4.8K
Enzymes like flippase, floppase, and scramblase transfer phospholipids from one layer to another in the membrane, thereby affecting membrane asymmetry.
Flippase
Eukaryotic flippases are type-IV P-type ATPases or P4-ATPases belonging to P-type ATPase family proteins that are membrane-bound pumps involved in the ATP-mediated transport of ions and molecules across the membrane. Flippases flip specific phospholipids from the outer to the inner leaflet of a membrane. All P4-ATPases have one...
Flippase
Eukaryotic flippases are type-IV P-type ATPases or P4-ATPases belonging to P-type ATPase family proteins that are membrane-bound pumps involved in the ATP-mediated transport of ions and molecules across the membrane. Flippases flip specific phospholipids from the outer to the inner leaflet of a membrane. All P4-ATPases have one...
4.8K
01:23Membrane Fluidity
155.5K
Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
155.5K
01:20Gas Exchange and Transport
71.2K
Gas exchange, the intake of molecular oxygen (O2) from the environment and the outflow of carbon dioxide (CO2) into the environment, is necessary for cellular function. Gas exchange during respiration occurs largely via the movement of gas molecules along pressure gradients. Gas travels from areas of higher partial pressure to areas of lower partial pressure. In mammals, gas exchange occurs in the alveoli of the lungs, which are adjacent to capillaries and share a membrane with them.
71.2K
01:17Pore Transport and Ion-Pair Transport
631
Pore transport and ion-pair formation are critical mechanisms for the absorption and distribution of drugs in the body.
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
631