Enthalpy (J/mol) of Carbon Dioxide as a Function of Temperature and Pressure

2016 ◽  
pp. 149-288
Keyword(s):  
Carbon Dioxide ◽  
Temperature And Pressure

Investigations of Gaseous Alternative Fuels at Atmospheric and Elevated Temperature and Pressure Conditions

2010 ◽  
Author(s):  
Audrius Bagdanavicius ◽  
Nasser Shelil ◽  
Philip J. Bowen ◽  
Nick Syred ◽  
Andrew P. Crayford
Keyword(s):  
Carbon Dioxide ◽  
Elevated Temperature ◽  
Turbulence Intensity ◽  
Alternative Fuels ◽  
Burning Velocity ◽  
Gas Mixture ◽  
Bunsen Burner ◽  
Swirl Burner ◽  
Temperature And Pressure ◽  
Methane Carbon

Increasing interest in alternative fuels for gas turbines stimulates research in gaseous fuels other than natural gas. Various gas mixtures, based on methane as the main component, are considered as possible fuels in the future. In particular, methane enrichment with hydrogen or dilution with carbon dioxide is of considerable interest. Some experiments and numerical calculations have been undertaken to investigate methane-hydrogen and methane-carbon dioxide gas flames, however most of these investigations are limited by particular pressure or temperature conditions. This paper presents the investigation of the combustion of methane–carbon dioxide mixtures at atmospheric and elevated temperature and pressure conditions. Two experimental rigs were used, a Bunsen burner and swirl burner. Bunsen burner experiments were performed in the High Pressure Optical Chamber, which is located within the Gas Turbine Research Centre of Cardiff University — at 3 bara and 7 bara pressure, and 473 K, 573 K and 673 K temperature conditions for lean and rich mixtures. Planar Laser Tomography (PLT) was applied to investigate turbulent burning velocity. Burning velocity of the gas mixture was calculated using two different image processing techniques and the difference in the results obtained using these two techniques is presented and discussed. Laser Doppler anemometry (LDA) was utilised to define turbulence characteristics such as turbulence intensity and integral length scale. Due to the variability of the velocity flow field and turbulence intensity across Bunsen burners, the importance of measuring position and conditions is discussed. The sensitivity of this variance on the flame regime as defined in the Borghi diagram is evaluated. In the second part of the study, a generic swirl burner was used to define the flame flashback limits for methane–carbon dioxide mixtures at atmospheric conditions. The gas mixture stability graphs are plotted, and the effect of CO2 addition are discussed.

scholarly journals Thermodynamic modeling of solid solubility in supercritical carbon dioxide: Comparison between mixing rules

2013 ◽  
Vol 19 (3) ◽  
pp. 389-398 ◽  
Author(s):  
Hadi Baseri ◽  
Ali Haghighi-Asl ◽  
Nader Lotfollahi
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Thermodynamic Modeling ◽  
Pressure Range ◽  
The Other ◽  
Mixing Rules ◽  
Calculation Results ◽  
Temperature And Pressure ◽  
Robinson Equation ◽  
Supercritical Carbon

In this paper, Peng Robinson equation of state is used for thermodynamic modeling of the solubility of various solid components in the supercritical carbon dioxide. Moreover, the effects of three mixing rules of Van der Waals mixing rules, Panagiotopoulos and Reid mixing rules and modified Kwak and Mansoori mixing rules on the accuracy of calculation results were studied. Good correlations between calculated and experimental data were obtained in the wide temperature and pressure range. A comparison between used models shows that modified Kwak and Mansoori mixing rules give better correlations in comparison with the other mixing rules.

Research on Polypropylene Dyeing in Supercritical Carbon Dioxide

2011 ◽  
Vol 175-176 ◽  
pp. 646-650 ◽  
Author(s):  
Hong Jie Zhang ◽  
Zhi Li Zhong ◽  
Li Li Feng ◽  
Xiao Ping Quan
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Disperse Dyes ◽  
Polypropylene Fibers ◽  
Temperature And Pressure ◽  
Supercritical Carbon

Polypropylene fibers were dyed with Disperse dyes Blue 2B in Supercritical Carbon Dioxide at different temperature, pressure and time. The K/S value were determined and the effect of as temperature, pressure and dyeing time on the dyeing behaviours of disperse dyes on Polypropylene fibers were discussed. It was found that with the increase of dyeing temperature and pressure, the K/S value increased gradually, and dyeing effect was best after the fiber was dyed at 120 °C, 28 MPa for 20 min.

Electrochemical conversion of carbon dioxide to formic acid on Pb in KOH/methanol electrolyte at ambient temperature and pressure

Energy ◽  
1998 ◽  
Vol 23 (12) ◽  
pp. 1107-1112 ◽  
Author(s):  
Satoshi Kaneco ◽  
Ryosuke Iwao ◽  
Kenji Iiba ◽  
Kiyohisa Ohta ◽  
Takayuki Mizuno
Keyword(s):  
Carbon Dioxide ◽  
Formic Acid ◽  
Ambient Temperature ◽  
Electrochemical Conversion ◽  
Temperature And Pressure

scholarly journals Phosphine-catalyzed fixation of CO2 with γ-hydroxyl alkynone under ambient temperature and pressure: kinetic resolution and further conversion

2019 ◽  
Vol 6 (14) ◽  
pp. 2420-2429 ◽  
Author(s):  
Yao-Liang Sun ◽  
Yin Wei ◽  
Min Shi
Keyword(s):  
Carbon Dioxide ◽  
Ambient Temperature ◽  
Kinetic Resolution ◽  
Carbon Dioxide Fixation ◽  
Temperature And Pressure ◽  
Propargyl Alcohols

Phosphine-catalyzed fixation of CO2 with γ-hydroxyl alkynone under ambient temperature and pressure was achieved and the first example of chiral phosphine catalyzed kinetic resolution of propargyl alcohols via carbon dioxide fixation was demonstrated.

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