Chemistry Reference
In-Depth Information
Table 4.3
Methane storage in POFs under high pressure
Material
SA
BET
(m
2
/g)
P
(bar)
T
(K)
CH
4
uptake (mmol/g)
References
COFs
COF-1
750
35
298
2.5
[
11
]
1,670
35
298
5.6
[
11
]
COF-5
COF-6
750
35
298
4.1
[
11
]
1,350
35
298
5.4
[
11
]
COF-8
COF-10
1,760
35
298
5.0
[
11
]
COF-102
3,620
35
298
11.7
[
11
]
3,530
35
298
10.9
[
11
]
COF-103
HCPs
1
1,904
15
298
4.4
[
47
]
298
5.2
20
1,307
15
298
3.9
[
47
]
2
298
4.5
20
963
15
298
3.2
[
47
]
3
298
3.5
20
36
298
4.3
1,366
15
298
4.3
[
47
]
4
20
298
4.6
298
5.5
36
1,249
70
295
6.25
[
48
]
PPN-1
PPN-2
1,764
70
295
9.4
[
48
]
4,221
70
295
12.2
[
48
]
PPN-3
6,461
55
295
17.1
[
32
]
PPN-4
ALP-1
70
298
9.0
[
49
]
70
298
9.6
[
49
]
ALP-2
70
298
9.9
[
49
]
ALP-3
ALP-4
70
298
7.2
[
49
]
4.3.2 Simulating CH
4
Uptake
Yaghi et al. reported several COFs as exceptional methane storage materials
[
11
]. The best COF in terms of total volume of adsorbed CH
4
per unit volume of
COF absorbent is COF-1, which can store 195 v/v at 298 K and 30 bar, exceed-
ing the DOE target for CH
4
storage of 180 v/v at 298 K and 35 bar. The best
COFs for methane adsorption are COF-102 and COF-103 with values of 230
and 234 v/v (from 5 to 100 bar), respectively, making these promising materials
for practical methane storage [
50
]. TND-1 and TND-2 were also theoretically
predicted by Cao et al. to have CH
4
uptake abilities [
43
]. It is noted that, at
35 bar and 298 K, the CH
4
uptake of TND-1 is 350 mg g
−
1
, which is higher than
238 mg g
−
1
of PAF-302, 193 mg g
−
1
of IRMOF-14, and even 253 mg g
−
1
of
PCN-14 (290 K).
