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The dependency on the temperature of efficiency of the regeneration process in glycols

Smulski R., Sacha J.

AGH Drilling, Oil, Gas

2016

Vol. 33, no. 4

733--746

The water content of glycol is important from the perspective of the dehumidification quality of natural gas, as the greater is it’s content, the more adversely it will affect further absorption of glycol during the dehumidification process. In order to restore its original properties, sorption glycol undergoes regeneration that is the process which consists of thermal evaporation of water contained therein. The separation of these components is made possible by the evaporation of water at a lower temperature, compared to glycols. In the industrial practice of dehumidifying natural gas using the absorption method, four kinds of glycol can be used. Their characteristics are presented in the report, discussing the current methods of regeneration, as well as presenting results from the laboratory tests which consisted of water content measurements taken after evaporation of water from the glycol solutions. These results were summarized and compared. To determine the content of water, the Karl Fischer titration method was used.

Combustion of mixtures of biogases and syngases with high molar fraction of methane in strong swirl flow

Ślefarski R., Sacha J., Grzymisławski P.

Archivum Combustionis

2014

Vol. 34 nr 2

117--128

The paper presents results of experimental studies on combustion of mixtures of methane and biogas and syngas in the swirl burner. The swirl of the stream of mixture of air and gases in the burner was generated by a swirler with helical blades. The study was focused on the influence of molar fraction of carbon dioxide (for biogas) and hydrogen (for syngas) on flame stability and emissions of nitric oxide compounds during combustion. The results, both experimental and numerical, show that a low content of carbon dioxide in methane- air mixture leads to better flame stability through an increase of the volume of the recirculation zone. It also leads to the lowering of emission of nitric oxides caused in the first order by the lowering of the temperature of flame. Co-combustion of natural gas with syngas containing hydrogen results in a considerable increase in flame stability due to a strong increase in velocity of flame propagation in laminar flow. It also causes increasing turbulent velocity of flame propagation. However, when a limit of molar fraction of hydrogen is passed, it leads to flashback.