Topics

Molecular Sieves for the Separation of Hydrogen Isotopes.

08:00 EDT 25th April 2019 | BioPortfolio

Summary of "Molecular Sieves for the Separation of Hydrogen Isotopes."

Stable molecular hydrogen isotopes, D and T, are both scarce and essential in several energy, industrial and large-scale, fundamental research applications. Due to the chemical similarity of these isotopes, their extraction and purification from hydrogen has relied for decades on expensive and energy-demanding processes. However, factoring in the phenomenon of quantum sieving could provide a new route for these separations. In this work, we have explored how to separate hydrogen isotopes by adsorption taking these quantum effects into account. To this end, we have conducted adsorption measurements to test our deuterium model, and performed a widespread computational screening over 210 pure-silica zeolites for
D:
H and
T:
H separations. Based on low-coverage adsorption properties, a reduced set of zeolites have been singled out and their performance in terms of adsorption capacity, selectivity and dynamic behavior have been assessed. Overall, the BCT-type zeolite clearly stands out for highly selective separations of both D and T over H, achieving the highest reported selectivities at cryogenic temperatures. We also identified other interesting zeolites for the separation of hydrogen isotopes that offer an alternative way to tackle similar isotopic separations by an aimed selection or design of porous materials.

Affiliation

Journal Details

This article was published in the following journal.

Name: ACS applied materials & interfaces
ISSN: 1944-8252
Pages:

Links

DeepDyve research library

PubMed Articles [11456 Associated PubMed Articles listed on BioPortfolio]

Oriented and Penetrating Zeolitic Imidazolate Framework ZIF-7 Polymer Composite Membrane with High Hydrogen Permselectivity.

Oriented and penetrating molecular sieving membranes are helpful to enhance their separation performances. Through a simple flat-scraping of polyimide (PI) solution containing highly dispersed ZIF-7(...

Systematic experimental study on quantum sieving of hydrogen isotopes in metal-amide-imidazolate frameworks with narrow 1-D channels.

Quantum sieving of hydrogen isotopes is experimentally studied in isostructural hexagonal metal-organic frameworks having 1-D channels, named IFP-1, -3, -4 and -7. Inside the channels different molecu...

Hydrogen Isotope Separation via Ion Penetration through Group-IV Monolayer Materials in Electrochemical Environment.

Based on density functional theory calculations, the chemical penetration behaviors and separation properties of hydrogen isotope ions through pristine and fully hydrogenated group-IV monolayer materi...

Hyperaging Tuning of a Carbon Molecular Sieve Hollow Fiber Membrane with Extraordinary Gas Separation Performance and Stability.

This communication reports 6FDA:BPDA-DAM polyimide-derived hollow fiber carbon molecular sieve (CMS) membranes for hydrogen and ethylene separation. Since H2/C2H4 selectivity is the lowest among H2/(C...

Enhanced CO2 capture and hydrogen purification via hydroxy metal-organic framework/polyimide mixed matrix membranes.

Membrane separation technology provides substantial energy- and cost-savings for molecular separations in chemical industrials, ideally complementing conventional thermal-driven separation approaches....

Clinical Trials [1954 Associated Clinical Trials listed on BioPortfolio]

Clinical Trial to Evaluate the Safety and Tolerability of Hydrogen in Patients With Parkinson's Disease

This study is a placebo-controlled, double-blind trial that will investigate the safety and tolerability of molecular hydrogen, a promising antioxidant agent, in patients with early-stage ...

Molecular Hydrogen for Cognitive Function and Performance in Elderly

A variety of non-pharmacological interventions have been used in the management of Alzheimer's disease (AD) and similar cognitive disorders in elderly, yet no therapeutic modality has demo...

Neuroprotection in Acute Ischemic Stroke

This is a pilot randomized control trial (RCT) to explore the possible beneficial effect of a novel combination therapy consisting of molecular hydrogen H2 plus minocycline ("H2M"), on neu...

Hydrotherapy With Hydrogen-rich Water vs. RICE Protocol Following Acute Ankle Sprain

The traditional treatment of soft tissue injuries consists of the RICE protocol - rest, ice, compression, and elevation, followed for up to 72 hours after a trauma. Although designed as an...

Combination of Dental Bleaching Techniques, Randomized Clinical Trial

To determine the effectiveness of combining different concentrations of hydrogen peroxide and carbamide used during tooth bleaching.

Medical and Biotech [MESH] Definitions

An oxidoreductase that catalyzes the reaction between superoxide anions and hydrogen to yield molecular oxygen and hydrogen peroxide. The enzyme protects the cell against dangerous levels of superoxide. EC 1.15.1.1.

The separation of individuals or groups resulting in the lack of or minimizing of social contact and/or communication. This separation may be accomplished by physical separation, by social barriers and by psychological mechanisms. In the latter, there may be interaction but no real communication.

The separation of particles from a suspension by passage through a filter with very fine pores. In ultrafiltration the separation is accomplished by convective transport; in DIALYSIS separation relies instead upon differential diffusion. Ultrafiltration occurs naturally and is a laboratory procedure. Artificial ultrafiltration of the blood is referred to as HEMOFILTRATION or HEMODIAFILTRATION (if combined with HEMODIALYSIS).

Hydrogen. The first chemical element in the periodic table. It has the atomic symbol H, atomic number 1, and atomic weight 1. It exists, under normal conditions, as a colorless, odorless, tasteless, diatomic gas. Hydrogen ions are PROTONS. Besides the common H1 isotope, hydrogen exists as the stable isotope DEUTERIUM and the unstable, radioactive isotope TRITIUM.

Unstable isotopes of zinc that decay or disintegrate emitting radiation. Zn atoms with atomic weights 60-63, 65, 69, 71, and 72 are radioactive zinc isotopes.

Quick Search


DeepDyve research library

Searches Linking to this Article