6.4 Zeolite-Based Catalysts for the Conversion …
139
Table 6.4
Catalytic performance of 3 wt% (0.32 mmol g −1
) Mo H-ZSM-5 catalysts with different Si/Al ratios for the methane aromatization reaction at 973 K
and 101 kPa
Si/Al ratio Al atoms per unit cell Al 3+
concentration
mmol g −1
CH
4 conversion/% Selectivity/C-atom % Hydrocarbon product distribution/%
Hydrocarbon Coke Benzene Toluene Naphthalene C
2
11.9
7.4
1.3
8.8
55.2
41.6
65.4
3.4
26.5
4.7
13.0
6.9
1.2
8.0
54.1
43.6
67.0
3.7
23.4
5.6
19.8
4.6
0.80
10.2
62.8
35.3
59.4
3.1
33.2
3.9
26.5
3.5
0.61
7.2
48.1
47.3
62.9
3.3
26.3
7.3
36.7
2.5
0.43
8.3
35.6
60.9
66.5
3.5
22.8
7.1
108
0.88
0.15
7.5
16.7
79.3
59.0
4.0
14.5
21.5
400
0.24
0.04
5.1
30.8
61.4
64.0
3.6
13.5
18.3
950
0.10
0.02
6.3
19.7
76.9
57.1
4.2
10.6
26.9
Reprinted from ref. [21], Copyright 2020, with permission from Elsevier