7.7 Unique Properties of Silver Cations …
205
Table 7.8
Dependence of the product selectivity on the contact time in n-butane
cracking (8.0 kPa) over H-ZSM-5 at 773 K (Reproduced from Ref. [92] with
permission from The Royal Society of Chemistry)
W/F/g
h mol −1
Conversion/%
Selectivity/mol in 100 mol n-butane
converted
CH
4
C
2 H
6
C
3 H
8
iso-C
4 H
10
C
2 H
4
C
3 H
6
C
4 H
8
H
2
0.075
0.57
49
39
2.4
2.3
36
37
18
28
0.085
0.71
40
36
2.3
2.4
33
33
27
–
0.1
1.82
42
36
2.6
1.6
34
33
26
–
0.2
1.61
42
39
4.8
1.5
38
34
21
–
0.4
3.7
33
33
8.6
1.4
35
31
27
21
0.6
5.4
32
32
13
1.7
37
30
24
20
–
0 a
42
38
0
0
33
34
27
20
a
Extrapolated