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Ultra-High Surface Area Activated Porous Asphalt for CO2 Capture through Competitive Adsorption at High Pressures
被引:111
作者:

Jalilov, Almaz S.
论文数: 0 引用数: 0
h-index: 0
机构:
Rice Univ, Dept Chem, 6100 Main ST MS 60, Houston, TX 77005 USA Rice Univ, Dept Chem, 6100 Main ST MS 60, Houston, TX 77005 USA

Li, Yilun
论文数: 0 引用数: 0
h-index: 0
机构:
Rice Univ, Dept Chem, 6100 Main ST MS 60, Houston, TX 77005 USA Rice Univ, Dept Chem, 6100 Main ST MS 60, Houston, TX 77005 USA

Tian, Jian
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h-index: 0
机构:
Rice Univ, Dept Chem, 6100 Main ST MS 60, Houston, TX 77005 USA Rice Univ, Dept Chem, 6100 Main ST MS 60, Houston, TX 77005 USA

Tour, James M.
论文数: 0 引用数: 0
h-index: 0
机构:
Rice Univ, Dept Chem, NanoCarbon Ctr, Dept Mat Sci & NanoEngn, 6100 Main ST MS 222, Houston, TX 77005 USA Rice Univ, Dept Chem, 6100 Main ST MS 60, Houston, TX 77005 USA
机构:
[1] Rice Univ, Dept Chem, 6100 Main ST MS 60, Houston, TX 77005 USA
[2] Rice Univ, Dept Chem, NanoCarbon Ctr, Dept Mat Sci & NanoEngn, 6100 Main ST MS 222, Houston, TX 77005 USA
关键词:
CARBON-DIOXIDE CAPTURE;
ELECTRIC SWING ADSORPTION;
GAS SEPARATION;
NATURAL-GAS;
METHANE;
DISPLACEMENT;
STORAGE;
GREEN;
D O I:
10.1002/aenm.201600693
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
This study reports an improved method for activating asphalt to produce ultra-high surface area porous carbons. Pretreatment of asphalt (untreated Gilsonite, uGil) at 400 degrees C for 3 h removes the more volatile organic compounds to form pretreated asphalt (uGil-P) material with a larger fraction of higher molecular weight pi-conjugated asphaltenes. Subsequent activation of uGil-P at 900 degrees C gives an ultra-high surface area (4200 m(2) g(-1)) porous carbon material (uGil-900) with a mixed micro and mesoporous structure. uGil-900 shows enhanced room temperature CO2 uptake capacity at 54 bar of 154 wt% (35 mmol g(-1)). The CH4 uptake capacity is 37.5 wt% (24 mmol g(-1)) at 300 bar. These are relevant pressures in natural gas production. The room temperature working CO2 uptake capacity for uGil-900 is 19.1 mmol g(-1) (84 wt%) at 20 bar and 32.6 mmol g(-1) (143 wt%) at 50 bar. In order to further assess the reliability of uGil-900 for CO2 capture at elevated pressures, the authors study competitive sorption of CO2 and CH4 on uGil-900 at pressures from 1 to 20 bar at 25 degrees C. CO2/CH4 displacement constants are measured at 2 to 40 bar, and found to increase significantly with pressure and surface area.
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