Quantitative estimation of NH3 partial pressure in H2 desorbed from the Li-N-H system by Raman spectroscopy.

SiCN Amorphous Materials Chemical Vapour Deposited Using the Si(CH3)4-NH3-H2 System

Elaboration of amorphous SiCPc: materials was performed using a conventional thermaly activated CVD at 100012003C from the '1MS-NH3-H2 system. 'I'he influence on the deposition rate and the composition was investigated using an experimental design by varq-ing: deposition temperature, pressure and hTb flow rate. A set of 16 samples SiCxNy with x!y ranged from 0.0.1. to 1.69 was prepared. .4ccura...

Incorporation of H2 in vitreous silica, qualitative and quantitative determination from Raman and infrared spectroscopy

Incorporation mechanisms of H2 in silica glass were studied with Raman and infrared (IR) microspectroscopy. Hydrogenated samples were prepared at temperatures between 800°C and 955°C at 2 kbar total pressure. Hydrogen fugacities (fH2) were controlled using the double capsule technique with the iron–wüstite (IW) buffer assemblage generating fH2 of 1290–1370 bars corresponding to H2 partial press...

Hydrogen desorption properties of Ca-N-H system

After synthesizing calcium amide (Ca(NH2)2) through the reaction of calcium hydride (CaH2) with ammonia (NH3), the thermal decomposition properties have been examined. The results indicated that Ca(NH2)2 decomposed to calcium imide (CaNH) and NH3 gas with increasing temperature, where the desorption of NH3 started from about 60 °C and peaked around 300 °C in the thermal desorption mass spectra ...

Chemical looping of metal nitride catalysts: low-pressure ammonia synthesis for energy storage† †Electronic supplementary information (ESI) available: Experimental and computational details, free energy plots for the NH3 evolution and N2 reduction with Co3N/Co, Fe4N/Fe, Mn5N2/Mn4N, Mo2N/Mo, CrN/Cr2N, TaN/Ta2N, NbN/Nb2N, Li3N/LiH, Ba3N2/BaH2, Sr3N2/SrH2, and Ca3N2/CaH2, surface oxidation energetics, ΔGvac[NH*x, yH*] based on gas phase H2 as hydrogen source, NH3 evolution with Fe-doped Mn4N, NH3 evolution with Mn6N2.58, Ca3N2 and Sr2N after correcting for partial nitride hydrolysis, NH3 yield from Ca3N2vs. time and H2 gas flow rate. See DOI: 10.1039/c5sc00789e

Estimation of UNIQUAC-NRF Model Parameters for NH3-CO2-H2O System

Vapor-liquid equilibrium in NH3-CO2-H2O system at high pressures has been studied. The UNIQUAC-NRF model for this system was extended by using the Goppert 4 maurer reported datas. Since the system contains molecules and ionic species the binary interaction parameters considered, where those are of molecule-molecule, molecule-ion and ion-ion types. These interaction parameters are taken as c...