Table 1 Summary of the methanol conversion and product selectivities over different catalysts in MTO reactionsa.

From: Control of zeolite microenvironment for propene synthesis from methanol

Entry

Catalyst

Conversion (%)

Selectivity (%)

C3H6/C2H4

DME

C2H4

C3H6

C4H8

C20–C40 b

Othersc

1

HZSM-5(0.027/1)

100

0

19

31

18

23

8.6

1.7

2

HZSM-5(0.04/1)

100

0

12

14

5.2

57

11

1.2

3

HZSM-5(0.067/1)

100

0

7.0

7.7

2.8

70

12

1.1

4

TaS-1(0.008/1)

5.1

>99

<0.1

0.4

0

0

0

–

5

TaS-1(0.013/1)

7.5

>99

<0.1

0.7

0

0

0

–

6

TaAlS-1(0.008/0.027/1)

97

1.3

4.8

52

25

7.2

9.7

11

7

TaAlS-1(0.013/0.027/1)

100

0

6.1

51

28

6.9

8.1

8.3

8

TaAlS-1(0.013/0.02/1)

86

64

2.9

18

10

1.2

3.6

6.1

9

TaAlS-1(0.013/0.013/1)

20

93

<0.1

1.9

2.7

0.1

2.4

–

10

Ta2O5/HZSM-5(0.027/1)d

100

0

20

33

19

23

6.1

1.7

  1. aReaction conditions: catalyst, 2.0 g; reaction temperature, 400 °C; atmospheric pressure; weight hourly space velocity (WHSV), 0.16 h−1; time-on-stream = 2 h.
  2. bC20–C40 refer to C2–C4-saturated hydrocarbons.
  3. cOther products include C5 and higher hydrocarbons and aromatics.
  4. dThe ratio of Ta/Al/Si in powdered mixture of Ta2O5/HZSM-5(0.027/1) (4.3 wt%/95.7 wt%) is 0.013/0.027/1.
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