Heats of adsorption of CO2 and NH3 on synthetic zeolites Communication 5. Adsorption of carbon dioxide on calcium zeolites

1985 ◽  
Vol 34 (6) ◽  
pp. 1135-1140 ◽  
Author(s):  
A. V. Zverev ◽  
S. S. Khvoshchev
Keyword(s):  
Carbon Dioxide ◽  
Heats Of Adsorption ◽  
Synthetic Zeolites ◽  
Adsorption Of Co2

Effect of carbon dioxide on transformations of isobutylene in the presence of synthetic zeolites

1973 ◽  
Vol 22 (6) ◽  
pp. 1223-1228
Author(s):  
A. L. Lapidus ◽  
L. N. Rudakova ◽  
Ya. I. Isakov ◽  
Kh. M. Minachev ◽  
Ya. T. �idus
Keyword(s):  
Carbon Dioxide ◽  
Synthetic Zeolites

scholarly journals The Heats of Adsorption of Carbon Dioxide on Coals and the Activation Energies for Diffusion of Carbon Dioxide into Coals

TANSO ◽  
1970 ◽  
Vol 1970 (61) ◽  
pp. 45-51
Author(s):  
Yuzo Toda ◽  
Masao Hatami ◽  
Sadaharu Toyoda ◽  
Yuji Yoshida ◽  
Hidemasa Honda
Keyword(s):  
Carbon Dioxide ◽  
Activation Energies ◽  
Heats Of Adsorption

scholarly journals Gravimetrically prepared carbon dioxide standards in support of atmospheric research

2019 ◽  
Vol 12 (1) ◽  
pp. 517-524 ◽  
Author(s):  
Bradley D. Hall ◽  
Andrew M. Crotwell ◽  
Benjamin R. Miller ◽  
Michael Schibig ◽  
James W. Elkins
Keyword(s):  
Carbon Dioxide ◽  
Trace Gases ◽  
Step Method ◽  
Atmospheric Research ◽  
Excellent Internal Consistency ◽  
One Step ◽  
Linear Fit ◽  
Steel Surfaces ◽  
Adsorption Of Co2 ◽  
Low Uncertainty

Abstract. We have explored a one-step method for gravimetric preparation of CO2-in-air standards in aluminum cylinders. We consider both adsorption to stainless steel surfaces used in the transfer of highly pure CO2 and adsorption of CO2 to cylinder walls. We demonstrate that CO2-in-air standards can be prepared with relatively low uncertainty (∼ 0.04 %, ∼95 % confidence level) by introducing aliquots whose masses are known to high precision and by using well-characterized cylinders. Five gravimetric standards, prepared over the nominal range of 350 to 490 µmol mol−1 (parts per million, ppm), showed excellent internal consistency, with residuals from a linear fit equal to 0.05 ppm. This work compliments efforts to maintain the World Meteorological Organization, Global Atmosphere Watch, mole fraction scale for carbon dioxide in air, widely used for atmospheric monitoring. This gravimetric technique could be extended to other atmospheric trace gases, depending on the vapor pressure of the gas.

scholarly journals Gravimetrically-Prepared Carbon Dioxide Standards in Support of Atmospheric Research

2018 ◽  
Author(s):  
Bradley D. Hall ◽  
Andrew M. Crotwell ◽  
Benjamin R. Miller ◽  
Michael Schibig ◽  
James W. Elkins
Keyword(s):  
Carbon Dioxide ◽  
Trace Gases ◽  
Step Method ◽  
Atmospheric Research ◽  
Excellent Internal Consistency ◽  
One Step ◽  
Linear Fit ◽  
Steel Surfaces ◽  
Adsorption Of Co2 ◽  
Low Uncertainty

Abstract. We have explored a one-step method for gravimetric preparation of CO2-in-air standards in aluminum cylinders. We consider both adsorption to stainless steel surfaces used in the transfer of highly-pure CO2, and adsorption of CO2 to cylinder walls. We demonstrate that CO2-in-air standards can be prepared with relatively low uncertainty (~ 0.04 %, ~ 95 % Confidence Level) by introducing aliquots whose masses are know to high precision, and by using well-characterized cylinders. Five gravimetric standards, prepared over the nominal range 350 to 490 µmol mol−1 (parts per million, ppm), showed excellent internal consistency, with residuals from a linear fit equal to 0.05 ppm. This work compliments efforts to maintain the World Meteorological Organization, Global Atmosphere Watch, mole fraction scale for carbon dioxide, widely used for atmospheric monitoring. This gravimetric technique could be extended to other atmospheric trace gases, depending on the vapor pressure of the gas.

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