CIESC Journal ›› 2021, Vol. 72 ›› Issue (11): 5633-5642.DOI: 10.11949/0438-1157.20210973
• Catalysis, kinetics and reactors • Previous Articles Next Articles
Zhen YANG(),Jingpei CAO(),Chen ZHU,Tianlong LIU,Xiaoyan ZHAO
Received:
2021-07-14
Revised:
2021-09-06
Online:
2021-11-12
Published:
2021-11-05
Contact:
Jingpei CAO
通讯作者:
曹景沛
作者简介:
杨珍(1990—),女,博士研究生,基金资助:
CLC Number:
Zhen YANG, Jingpei CAO, Chen ZHU, Tianlong LIU, Xiaoyan ZHAO. Catalytic conversion of lignite pyrolysis volatiles for enriching light aromatics over B-ZSM-5[J]. CIESC Journal, 2021, 72(11): 5633-5642.
杨珍, 曹景沛, 朱陈, 刘天龙, 赵小燕. B-ZSM-5酸调控及催化褐煤热解挥发分制轻质芳烃研究[J]. 化工学报, 2021, 72(11): 5633-5642.
Samples | SBET①/(m2/g) | Smicro②/(m2/g) | Sext③/(m2/g) | Vt④/(cm3/g) | Vmicro⑤/(cm3/g) | Vext⑥/(cm3/g) | Dave⑦/nm |
---|---|---|---|---|---|---|---|
Na-H5 | 389 | 343 | 46 | 0.29 | 0.16 | 0.13 | 2.9 |
Na-0.23B-H5 | 396 | 342 | 54 | 0.29 | 0.16 | 0.13 | 3.0 |
Na-0.46B-H5 | 403 | 346 | 57 | 0.30 | 0.15 | 0.15 | 2.9 |
Na-0.69B-H5 | 406 | 344 | 62 | 0.33 | 0.15 | 0.18 | 3.3 |
H5 | 427 | 386 | 41 | 0.48 | 0.16 | 0.32 | 4.1 |
0.23B-H5 | 447 | 397 | 50 | 0.35 | 0.17 | 0.18 | 3.1 |
0.46B-H5 | 438 | 389 | 49 | 0.36 | 0.16 | 0.20 | 3.4 |
0.69B-H5 | 436 | 393 | 43 | 0.41 | 0.16 | 0.25 | 3.8 |
Table 1 Textural properties of Na-xB-H5 and xB-H5 with different B content
Samples | SBET①/(m2/g) | Smicro②/(m2/g) | Sext③/(m2/g) | Vt④/(cm3/g) | Vmicro⑤/(cm3/g) | Vext⑥/(cm3/g) | Dave⑦/nm |
---|---|---|---|---|---|---|---|
Na-H5 | 389 | 343 | 46 | 0.29 | 0.16 | 0.13 | 2.9 |
Na-0.23B-H5 | 396 | 342 | 54 | 0.29 | 0.16 | 0.13 | 3.0 |
Na-0.46B-H5 | 403 | 346 | 57 | 0.30 | 0.15 | 0.15 | 2.9 |
Na-0.69B-H5 | 406 | 344 | 62 | 0.33 | 0.15 | 0.18 | 3.3 |
H5 | 427 | 386 | 41 | 0.48 | 0.16 | 0.32 | 4.1 |
0.23B-H5 | 447 | 397 | 50 | 0.35 | 0.17 | 0.18 | 3.1 |
0.46B-H5 | 438 | 389 | 49 | 0.36 | 0.16 | 0.20 | 3.4 |
0.69B-H5 | 436 | 393 | 43 | 0.41 | 0.16 | 0.25 | 3.8 |
Catalysts | Acid/(mmol NH3/g) | Acidity density/ (mmol/m2) | Relative crystallinity① /% | Al②/% | B②/% | ||
---|---|---|---|---|---|---|---|
Weak (150~300℃) | Strong (300~500℃) | Total | |||||
Na-H5 | 0.12 | 0.12 | 0.24 | 0.00062 | 100 | — | — |
Na-0.23B-H5 | 0.18 | 0.14 | 0.32 | 0.00081 | 99.3 | — | — |
Na-0.46B-H5 | 0.22 | 0.13 | 0.35 | 0.00087 | 99.3 | — | — |
Na-0.69B-H5 | 0.20 | 0.14 | 0.34 | 0.00084 | 98.9 | — | — |
Na-0.92B-H5 | 0.21 | 0.13 | 0.34 | — | 99.1 | — | — |
H5 | 0.09 | 0.16 | 0.25 | 0.00059 | 99.8 | — | — |
0.23B-H5 | 0.15 | 0.11 | 0.26 | 0.00058 | 99.3 | 0.7 | 0.1 |
0.46B-H5 | 0.11 | 0.07 | 0.18 | 0.00041 | 99.2 | 0.8 | 0.2 |
0.69B-H5 | 0.09 | 0.05 | 0.14 | 0.00032 | 99.3 | 0.7 | 0.1 |
Table 2 Acidity distribution of Na-xB-H5 and xB-H5 with different B content
Catalysts | Acid/(mmol NH3/g) | Acidity density/ (mmol/m2) | Relative crystallinity① /% | Al②/% | B②/% | ||
---|---|---|---|---|---|---|---|
Weak (150~300℃) | Strong (300~500℃) | Total | |||||
Na-H5 | 0.12 | 0.12 | 0.24 | 0.00062 | 100 | — | — |
Na-0.23B-H5 | 0.18 | 0.14 | 0.32 | 0.00081 | 99.3 | — | — |
Na-0.46B-H5 | 0.22 | 0.13 | 0.35 | 0.00087 | 99.3 | — | — |
Na-0.69B-H5 | 0.20 | 0.14 | 0.34 | 0.00084 | 98.9 | — | — |
Na-0.92B-H5 | 0.21 | 0.13 | 0.34 | — | 99.1 | — | — |
H5 | 0.09 | 0.16 | 0.25 | 0.00059 | 99.8 | — | — |
0.23B-H5 | 0.15 | 0.11 | 0.26 | 0.00058 | 99.3 | 0.7 | 0.1 |
0.46B-H5 | 0.11 | 0.07 | 0.18 | 0.00041 | 99.2 | 0.8 | 0.2 |
0.69B-H5 | 0.09 | 0.05 | 0.14 | 0.00032 | 99.3 | 0.7 | 0.1 |
催化剂 | 气体产率/(mmol/g) | ||||||
---|---|---|---|---|---|---|---|
H2 | CH4 | C2H6 | C2H4 | C3~C4 | CO | CO2 | |
Na-H5 | 1.37 | 0.95 | 0.10 | 0.40 | 0.01 | 1.10 | 1.41 |
Na-0.23B-H5 | 1.40 | 0.89 | 0.08 | 0.31 | 0.01 | 1.23 | 0.86 |
Na-0.46B-H5 | 1.22 | 0.75 | 0.06 | 0.25 | 0.01 | 1.12 | 0.76 |
Na-0.69B-H5 | 1.16 | 0.76 | 0.06 | 0.26 | <0.01 | 1.16 | 0.62 |
Na-0.92B-H5 | 1.47 | 0.86 | 0.07 | 0.28 | <0.01 | 1.28 | 0.79 |
H5 | 1.23 | 0.81 | 0.07 | 0.30 | 0.01 | 1.25 | 0.78 |
0.23B-H5 | 1.06 | 0.83 | 0.08 | 0.31 | 0.01 | 1.23 | 0.76 |
0.46B-H5 | 1.26 | 0.84 | 0.08 | 0.32 | 0.02 | 1.26 | 0.89 |
0.69B-H5 | 1.13 | 0.85 | 0.09 | 0.34 | 0.01 | 1.27 | 1.01 |
Table 3 Gas yield of lignite catalytic pyrolysis over different catalysts
催化剂 | 气体产率/(mmol/g) | ||||||
---|---|---|---|---|---|---|---|
H2 | CH4 | C2H6 | C2H4 | C3~C4 | CO | CO2 | |
Na-H5 | 1.37 | 0.95 | 0.10 | 0.40 | 0.01 | 1.10 | 1.41 |
Na-0.23B-H5 | 1.40 | 0.89 | 0.08 | 0.31 | 0.01 | 1.23 | 0.86 |
Na-0.46B-H5 | 1.22 | 0.75 | 0.06 | 0.25 | 0.01 | 1.12 | 0.76 |
Na-0.69B-H5 | 1.16 | 0.76 | 0.06 | 0.26 | <0.01 | 1.16 | 0.62 |
Na-0.92B-H5 | 1.47 | 0.86 | 0.07 | 0.28 | <0.01 | 1.28 | 0.79 |
H5 | 1.23 | 0.81 | 0.07 | 0.30 | 0.01 | 1.25 | 0.78 |
0.23B-H5 | 1.06 | 0.83 | 0.08 | 0.31 | 0.01 | 1.23 | 0.76 |
0.46B-H5 | 1.26 | 0.84 | 0.08 | 0.32 | 0.02 | 1.26 | 0.89 |
0.69B-H5 | 1.13 | 0.85 | 0.09 | 0.34 | 0.01 | 1.27 | 1.01 |
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