WebFeb 1, 2024 · Electrochemical two-electron water oxidation is a promising route for renewable and on-site H2O2 generation as an alternative to the anthraquinone process. However, it is currently restricted by low selectivity due to strong competition from the traditional four-electron oxygen evolution reaction, as well as large overpotential and low … WebDec 11, 2024 · Screening for selectivity. Metal–organic frameworks are promising adsorbents for CO 2 capture from flue gas, but many perform poorly when exposed to flue gas containing water. Now, a ...

High-selective sensitive NH3 gas sensor: A density functional …

WebJan 5, 1999 · Gas separation properties of polymer membrane materials follow distinct tradeoff relations: more permeable polymers are generally less selective and vice versa. … WebMar 14, 2014 · A highly gas permeable polymer with exceptional size selectivity is prepared by fusing triptycene units together via a polymerization reaction involving Tröger's base formation. The extreme rigidity of this polymer of intrinsic microporosity (PIM-Trip-TB) facilitates gas permeability data that lie well above the benchmark 2008 Robeson upper … raitiovaunu 3 reitti ja pysäkit

Characterizing Adsorbents for Gas Separations AIChE

WebSelectivity to a target gas A toward any interfering gas B is traditionally defined as the ratio of the sensor response to gas A to the response to gas B (Kalantar-zadeh, 2013). The … The performance of an adsorbent for a particular separation depends on several factors. One of the most important is its working capacity. For PSA, it is the difference between the uptake at the feed pressure and the uptake at the regeneration pressure. For TSA, it is the difference between the uptakes at the feed … See more Working capacity and isotherm shape are basic properties that define a material’s ability to adsorb gases. For separation, however, selectivity is more important. Selectivity can be defined in different ways depending on the … See more The heat of adsorption, usually expressed in kJ/mol, indicates the strength of interaction between the adsorbate and the adsorbent. Purely physical adsorption, or physisorption, has a low heat of adsorption, whereas … See more The equilibria and kinetics of gas adsorption depend on the properties of the adsorbate and the adsorbent (2). Maximum equilibrium capacities, for example, generally … See more Equilibrium uptakes determined from isotherms are required to define working capacities and isotherm shape, and to calculate equilibrium selectivities and heats of adsorption; … See more Gas separation across a membrane is a pressure-driven process, where the driving force is the difference in pressure between inlet of raw material and outlet of product. The membrane used in the process is a generally non-porous layer, so there will not be a severe leakage of gas through the membrane. The performance of the membrane depends on permeability and selectivity. Permeability is affected by the penetrant size. Larger gas molecules have a lower diffusion coeff… cyberprivacyconsultant