Solubility of carbon dioxide, hydrogen sulfide, and methane in pure and mixed solvents

1984 ◽  
Vol 29 (4) ◽  
pp. 456-460 ◽  
Author(s):  
Florentino Murrieta-Guevara ◽  
Arturo Trejo Rodriguez
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Sulfide ◽  
Mixed Solvents ◽  
Pure And Mixed Solvents

Ammonia and other microclimatic conditions at an Australian pre-export sheep assembly depot

2013 ◽  
Vol 53 (6) ◽  
pp. 580
Author(s):  
Mathew K. Pines ◽  
Tracy Muller ◽  
Clive J. C. Phillips
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Sulfide ◽  
Moisture Content ◽  
Gaseous Emissions ◽  
Housing Systems ◽  
Health And Wellbeing ◽  
Ammonia Accumulation ◽  
Animal Excreta ◽  
Microclimatic Conditions ◽  
Positive Correlations

Noxious gases produced at hazardous concentrations in animal housing systems may affect the health and wellbeing of both animals and workers. In order to determine if the gaseous emissions from a pre-export assembly depot for sheep constituted a risk, atmospheric ammonia was measured in eight sheep buildings at an Australian assembly depot. Additionally, meteorological variables and distance from excreta were measured to determine their influence on ammonia, carbon dioxide and hydrogen sulfide concentrations. Repeat measurements were made at 12 sites in each building on 4 separate days, and four buildings were mapped using longitudinal and latitudinal transects. Concentrations of ammonia, carbon dioxide and hydrogen sulfide were all below the recommended safety thresholds for humans and livestock. There were positive correlations between ammonia and the following variables: ambient temperature and moisture content, and negative correlations with distance from animal excreta. Understanding these relationships will help to understand the reasons for ammonia accumulation in such buildings.

Temperaturabhängigkeit der statischen Dielektrizitätskonstante und des optischen Brechungsindexes von Flüssigkeiten

1975 ◽  
Vol 30 (3) ◽  
pp. 287-291 ◽  
Author(s):  
I. Gryczyński ◽  
A. Kawski
Keyword(s):  
Dielectric Constant ◽  
Refractive Index ◽  
Dipole Moment ◽  
Dipole Moments ◽  
Mixed Solvents ◽  
Temperature Changes ◽  
Temperature Dependences ◽  
Solvent Shifts ◽  
Pure And Mixed Solvents ◽  
Good Agreement

A variation of the temperature changes the static dielectric constant (ε) and the refractive index (n) of solvents and, in conjunction with the measurement of solvent shifts of absorption and fluorescence maxima, allows the investigation of dipole moment changes of solutes in the excited state. For this purpose, investigations of the temperature dependences of ε and n of some pure and mixed solvents of different polarities have been made. It is found that the excited dipole moments of indole, 1,2-dimethylindole, 2,3-dimethylindole and tryptophan obtained from the shifts of the fluorescence maxima in mixed solvents at high temperatures are in good agreement with those obtained in other ways.

scholarly journals Stan i perspektywy wykorzystania biogazu jako nośnika energii do zastosowań stacjonarnych i środków transportu

2012 ◽  
Vol 10 (3) ◽  
pp. 97-118
Author(s):  
Krzysztof Biernat ◽  
Izabela Różnicka
Keyword(s):  
Carbon Dioxide ◽  
Renewable Energy ◽  
Hydrogen Sulfide ◽  
Energy Balance ◽  
Sewage Sludge ◽  
Motor Fuel ◽  
International Programs ◽  
Biogas Upgrading ◽  
Compressed Natural Gas ◽  
Production Of Hydrogen

Both governmental and international programs support the promotion of biofuels and aim to increase the limit of renewable energy used in the fuel energy balance. Biogas is produced during the anaerobic methane fermentationprocess and it is known as a significant source of renewable energy, contributing to agriculture and environmental protection. Three types of biogas can be distinguished: biogas from sewage sludge, biogas collected from land`fils, andagricultural biogas. There are several possibilities of using upgraded biogas. Biogas can be used in cogeneration systems to provide heat and electricity, in transportation as a motor fuel and in the production of biohydrogen. Biogas upgrading process leads to a product which is characterized by the same parameters as compressed natural gas. Direct biogas use in the production of hydrogen is possible because of prior purification from traces like hydrogen sulfide, except carbon dioxide, by which the reaction can proceed in the desired manner.

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