We employ a rigorous thermodynamic modeling approach to investigate the water adsorption phenomena on two calcium sulfate compounds, AIII-CaSO4 and CaSO4·0.5H2O. In part 1 of this work ( Ind. Eng. Chem. Res., 2019, DOI: 10.1021/acs.iecr.9b00856), we prepared these two products by the dehydration of synthetic CaSO4·2H2O and obtained quantitative ads...
Published in Materials
Adsorption and diffusion of water vapor in phosphonium ionic liquid modified silica gel were studied, aiming to reduce the loading of water vapor in porous materials. The modified silica gel was prepared through a grafting method and characterized by FTIR, thermal gravity analysis and X-ray photoelectron spectroscopy. N2 sorption isotherms at −196 ...
Published in Coke and Chemistry
AbstractThe formation of the combustion flame in the heating channels of coke batteries is considered. The changes in the flame configuration when water vapor is supplied to the heating channels are described. The associated formation and collapse of water-vapor bubbles disrupts the continuity of the medium, resulting in instantaneous interruption ...
Published in Atmospheric and Oceanic Optics
AbstractLine halfwidths and shifts are calculated for water vapor and carbon monoxide confined in nanoporous media. Physically adsorbed H2O and CO molecules are considered as scattering centers. The influence of changes in the rotational structure of levels in physically adsorbed molecules is numerically analyzed. The comparison with the existing e...
Published in Steel in Translation
AbstractThe complete reduction of iron oxide on heating the initial Fe3O4–H2O–C system with isothermal holding is subjected to thermodynamic analysis. (Note that the initial system contains eo moles of Fe3O4 and bo moles of H2O, with excess carbon.) The processes in the system may be divided into four stages. First, the gasification of carbon by wa...
Published in Frontiers in Chemistry
In this contribution the sorption of water vapor in Poly(L-lactic acid) (PLLA) was studied by time-resolved FTIR spectroscopy. The collected FTIR data were analyzed by complementary approaches such as difference spectroscopy, two-dimensional correlation spectroscopy (2D-COS), and least-squares curve-fitting analysis which provided information about...
The spatio-temporal distribution of atmospheric water vapor information can be obtained by global positioning system (GPS) water vapor tomography. GPS signal rays pass through the tomographic area from different boundaries because the scope of the research region (latitude, longitude, and altitude) is designated in the process of tomographic modeli...
We revised the calibration of a water vapor Raman lidar by co-located radiosoundings for a site in the high European Arctic. For this purpose, we defined robust criteria for a valid calibration. One of these criteria is the logarithm of the water vapor mixing ratio between the sonde and the lidar. With an error analysis, we showed that for our site...
Published in Membranes and Membrane Technologies
AbstractA method is proposed for the removal of water vapor from commercial grade nitrous oxide during its high purification using membrane gas-separation technologies. A single membrane module, a two-stage recirculation unit with the recycling of permeate stream, and two-stage cascades with membranes of different selectivity and experimentally det...
Published in Radiochemistry
The behavior of Cl, Ca, Be, Ni, and Cs radionuclides in the course of heating of radioactive graphite in steam was studied by thermodynamic modeling. Complete thermodynamic analysis at temperatures in the interval from 373 to 3273 K was performed using the TERRA program with the aim of determining the possible composition of the gas phase. The mode...
