A simple and versatile approach has been developed to synthesize different carbon/zeolite T functional membrane materials. The precursors of the membrane are composed of polyimide matrix and dispersed zeolite T particles. Membranes prepared by pyrolysis at 973 K showed excellent gas (H2, CO2, O2, N2, CH4) permeability and selectivity and the gas selectivity (O2/N2, CO2/CH4) of the functional me...

Understanding what governs the speciation in the C–O–H–N system aids our knowledge of how volatiles affect mass transfer processes in the Earth’s interior. Experiments with aluminosilicate melt + C–O–H–N volatiles were, therefore, carried out with Raman and infrared spectroscopy to 800 °C and near 700 MPa in situ in hydrothermal diamond anvil cells. The measurements were conducted in situ with ...

Separation of CO2 involving mixtures is relevant to the various industrial settings and preserving environment for which different classes materials including metal-organic frameworks (MOFs) have been researched. Herein, CO2/CO, CO2/H2, CO2/N2, H2S/CO2 separation properties zirconium MOFs are computationally investigated mimicking vacuum swing adsorption (VSA) process. Structure-performance rel...

Summary Artificial N2 fixation is one of the most important industrial processes for human beings. However, current Haber-Bosch process based on fossil fuel suffers from unsustainability and a low to NH3 conversion. Here, we report magnesium chloride cycle synthesis H2O at atmospheric pressure. In this cycle, reacts with Mg form Mg3N2. Cl2 are produced by electrolysis molten MgCl2. NH4Cl used h...

A new nanoporous porphyrin-based benzimidazole linked polymer, PBILP, was synthesized. The use of porphyrin monomers as molecular building units led to the formation of a rigid amorphous network that has a moderate surface area (SBET 1⁄4 557 m g ). The CO2 adsorption ability of PBILP is 12.1 wt% (2.76 mmol g ) and it has a CO2/CH4 selectivity of 7.2 at 273 K/1 bar and a CO2/N2 selectivity of 72...

In this work, we report the successful fabrication of CO2-philic polymer composite membranes using a polyacrylonitrile-r-poly(ethylene glycol) methyl ether methacrylate (PAN-r-PEGMA) copolymer. The series of PAN-r-PEGMA copolymers with various amounts of PEG content was synthesized by free radical polymerization in presence of AIBN initiator and the obtained copolymers were used for the fabrica...

Significant stress changes caused by sorption-induced swelling raise the coal wellbore failure potential, which directly impacts safety and sustainability of CO2 enhanced coalbed methane (CO2-ECBM). Additionally, a mixture gas (CO2/N2) injection is recommended due to sharp decline permeability with pure injection. In this study, incorporating adsorption poroelastic effects, semi-analytical mode...

In the present study, we investigated the effects of the naturally occurring hormone dehydroepiandrosterone (DHEA) on hypoxic pulmonary vasoconstriction (HPVC) in isolated ferret lungs and on K+ currents in isolated and cultured ferret pulmonary arterial smooth muscle cells (FPSMCs). Severe alveolar hypoxia (3% O2-5% CO2-92% N2) caused an initial increase in pulmonary arterial pressure (Ppa) th...

The synthesis of nitrogenase by intact cells of Rhodospirillum rubrum was repressed in N-free media supplemented with L-glutamine or L-asparagine, but was unaffected by the presence of L-glutamate, L-aspartate or L-histidine. Specific activities attained by cultures in supplemented media maintained under Ar-CO2 were 2 to 3 times higher than those in N-free medium under N2-CO2. A loss in total a...

The liquid-phase epitaxy (LPE) method was effectively implemented to deliberately grow/construct ultrathin (0.5-1 μm) continuous and defect-free ZIF-8 membranes. Permeation properties of different gas pair systems (O2-N2, H2-CO2, CO2-CH4, C3H6-C3H8, CH4-n-C4H10) were studied using the time lag technique.