Pore structure analysis by water vapor adsorption. IV. Analysis of hydrated portland cement pastes of low porosity

1972 ◽  
Vol 38 (1) ◽  
pp. 265-276 ◽  
Author(s):  
Ivan Odler ◽  
Julius Hagymassy ◽  
Marvin Yudenfreund ◽  
Kaissar M Hanna ◽  
Stephen Brunauer
Keyword(s):  
Water Vapor ◽  
Portland Cement ◽  
Pore Structure ◽  
Structure Analysis ◽  
Water Vapor Adsorption ◽  
Cement Pastes ◽  
Vapor Adsorption ◽  
Low Porosity ◽  
Pore Structure Analysis

Pore structure analysis by water vapor adsorption

1969 ◽  
Vol 29 (3) ◽  
pp. 485-491 ◽  
Author(s):  
Julius Hagymassy ◽  
Stephen Brunauer ◽  
R.Sh Mikhail
Keyword(s):  
Water Vapor ◽  
Pore Structure ◽  
Structure Analysis ◽  
Water Vapor Adsorption ◽  
Vapor Adsorption ◽  
Pore Structure Analysis

Hardened portland cement pastes of low porosity IV. Surface area and pore structure

1972 ◽  
Vol 2 (5) ◽  
pp. 577-589 ◽  
Author(s):  
Ivan Odler ◽  
Julius Hagymassy ◽  
Edward E. Bodor ◽  
Marvin Yudenfreund ◽  
Stephen Brunauer
Keyword(s):  
Portland Cement ◽  
Pore Structure ◽  
Surface Area ◽  
Cement Pastes ◽  
Low Porosity

scholarly journals Preparation and water vapor adsorption of “green” walnut-shell activated carbon by CO2 physical activation

2020 ◽  
Vol 38 (1-2) ◽  
pp. 60-76 ◽  
Author(s):  
Hong Zhao ◽  
Qiongfen Yu ◽  
Ming Li ◽  
Shengnan Sun
Keyword(s):  
Activated Carbon ◽  
Water Vapor ◽  
Specific Surface ◽  
Pore Structure ◽  
Surface Area ◽  
Specific Surface Area ◽  
Water Vapor Adsorption ◽  
Walnut Shell ◽  
Physical Activation ◽  
Vapor Adsorption

In this study, activated carbons without any chemical residue were prepared from walnut shells. The preparation method in a tube furnace included a pyrolysis carbonization process and a CO2 activation process. The influences of activation temperature and holding time on the specific surface area, yield, and pore structure were investigated. Adsorption performance of water vapor was also examined in details. Thermogravimetric analysis, N2 adsorption–desorption isotherm, and scanning electron microscope were used to characterize samples. The result shows that the activation energy at different heating rates varies from 30.16 to 64.86 kJ/mol. The highest water vapor adsorption capacity of the sample is 0.3824 g/g and it takes only 30 min to realize regeneration. And the maximum Brunauer–Emmett–Teller specific surface area of 1228 m2/g also occurs in this optimal preparation condition. CO2 physical activation method was found to have a positive effect on pore structure development of activated carbon for water vapor adsorption.

Impact of surface chemistry and pore structure on water vapor adsorption behavior in gas shale

2020 ◽  
Vol 402 ◽  
pp. 126238 ◽  
Author(s):  
Jiajia Bai ◽  
Yili Kang ◽  
Mingjun Chen ◽  
Zhangxin Chen ◽  
Lijun You ◽  
...  
Keyword(s):  
Water Vapor ◽  
Surface Chemistry ◽  
Pore Structure ◽  
Water Vapor Adsorption ◽  
Adsorption Behavior ◽  
Gas Shale ◽  
Vapor Adsorption

Hardened portland cement pastes of low porosity

1973 ◽  
Vol 3 (3) ◽  
pp. 279-293 ◽  
Author(s):  
Stephen Brunauer ◽  
Jan Skalny ◽  
Ivan Odler ◽  
Marvin Yudenfreund
Keyword(s):  
Portland Cement ◽  
Cement Pastes ◽  
Low Porosity
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