CIESC Journal ›› 2021, Vol. 72 ›› Issue (11): 5620-5632.DOI: 10.11949/0438-1157.20210799
• Catalysis, kinetics and reactors • Previous Articles Next Articles
Xueyu REN(),Jingpei CAO(),Naiyu YAO,Xiaoyan ZHAO,Xiaobo FENG,Tianlong LIU,Yunpeng ZHAO
Received:
2021-06-17
Revised:
2021-08-26
Online:
2021-11-12
Published:
2021-11-05
Contact:
Jingpei CAO
任雪宇(),曹景沛(),姚乃瑜,赵小燕,冯晓博,刘天龙,赵云鹏
通讯作者:
曹景沛
作者简介:
任雪宇(1992—),女,博士研究生,基金资助:
CLC Number:
Xueyu REN, Jingpei CAO, Naiyu YAO, Xiaoyan ZHAO, Xiaobo FENG, Tianlong LIU, Yunpeng ZHAO. Turning hierarchical ZSM-5 by template methods and its application in catalyzing lignite-derived volatiles to light aromatics[J]. CIESC Journal, 2021, 72(11): 5620-5632.
任雪宇, 曹景沛, 姚乃瑜, 赵小燕, 冯晓博, 刘天龙, 赵云鹏. 模板法调控多级孔ZSM-5催化褐煤挥发分制备轻质芳烃的研究[J]. 化工学报, 2021, 72(11): 5620-5632.
Sample | Surface area/(m2/g) | Pore volume/(cm3/g) | Dave⑤/nm | ||||
---|---|---|---|---|---|---|---|
SBET① | Smicro② | Sext② | Vtotal④ | Vmicro② | Vext③ | ||
CB | 1351 | 890 | 461 | 3.35 | 0.41 | 2.94 | 10.00 |
NaClO-CB | 1026 | 654 | 372 | 2.54 | 0.31 | 2.23 | 9.91 |
H2O2-CB | 450 | 101 | 349 | 1.47 | 0.05 | 1.42 | 13.00 |
HNO3-CB | 1232 | 838 | 394 | 1.97 | 0.39 | 1.58 | 6.38 |
HeZ5 | 386 | 350 | 36 | 0.23 | 0.14 | 0.09 | 2.43 |
HeZ5-Ⅰ | 345 | 312 | 33 | 0.21 | 0.15 | 0.06 | 2.44 |
HeZ5-Ⅱ | 364 | 312 | 52 | 0.23 | 0.16 | 0.07 | 2.56 |
HeZ5-Ⅲ | 377 | 347 | 30 | 0.21 | 0.16 | 0.05 | 2.27 |
HeZ5-Ⅳ | 344 | 264 | 80 | 0.19 | 0.16 | 0.03 | 2.23 |
HZSM-5 | 422 | 376 | 46 | 0.23 | 0.16 | 0.07 | 3.70 |
Table 1 The textural properties of oxidation modified CB and hierarchical ZSM-5
Sample | Surface area/(m2/g) | Pore volume/(cm3/g) | Dave⑤/nm | ||||
---|---|---|---|---|---|---|---|
SBET① | Smicro② | Sext② | Vtotal④ | Vmicro② | Vext③ | ||
CB | 1351 | 890 | 461 | 3.35 | 0.41 | 2.94 | 10.00 |
NaClO-CB | 1026 | 654 | 372 | 2.54 | 0.31 | 2.23 | 9.91 |
H2O2-CB | 450 | 101 | 349 | 1.47 | 0.05 | 1.42 | 13.00 |
HNO3-CB | 1232 | 838 | 394 | 1.97 | 0.39 | 1.58 | 6.38 |
HeZ5 | 386 | 350 | 36 | 0.23 | 0.14 | 0.09 | 2.43 |
HeZ5-Ⅰ | 345 | 312 | 33 | 0.21 | 0.15 | 0.06 | 2.44 |
HeZ5-Ⅱ | 364 | 312 | 52 | 0.23 | 0.16 | 0.07 | 2.56 |
HeZ5-Ⅲ | 377 | 347 | 30 | 0.21 | 0.16 | 0.05 | 2.27 |
HeZ5-Ⅳ | 344 | 264 | 80 | 0.19 | 0.16 | 0.03 | 2.23 |
HZSM-5 | 422 | 376 | 46 | 0.23 | 0.16 | 0.07 | 3.70 |
Sample | C 1s | O 1s | C/O(atomic ratio) | |||||
---|---|---|---|---|---|---|---|---|
C—C | C—O | CO | OC—O | —CO | C—O | OC—O | ||
CB | 35.10 | 24.15 | 19.64 | 21.11 | 34.42 | 33.23 | 32.35 | 10.10 |
HNO3-CB | 36.18 | 22.31 | 19.44 | 22.07 | 35.04 | 33.15 | 31.81 | 3.85 |
Table 2 The relative content of functional groups in XPS spectra
Sample | C 1s | O 1s | C/O(atomic ratio) | |||||
---|---|---|---|---|---|---|---|---|
C—C | C—O | CO | OC—O | —CO | C—O | OC—O | ||
CB | 35.10 | 24.15 | 19.64 | 21.11 | 34.42 | 33.23 | 32.35 | 10.10 |
HNO3-CB | 36.18 | 22.31 | 19.44 | 22.07 | 35.04 | 33.15 | 31.81 | 3.85 |
Catalysts | Acidity/(mmol/g) | ||
---|---|---|---|
Strong acid | Weak acid | Total acid | |
HeZ5 | — | 0.57 | 0.57 |
HeZ5-Ⅰ | 0.11 | 0.18 | 0.29 |
HeZ5-Ⅱ | 0.06 | 0.12 | 0.18 |
HeZ5-Ⅲ | 0.11 | 0.18 | 0.29 |
HeZ5-Ⅳ | — | 0.11 | 0.12 |
HZSM-5[ | 0.36 | 0.83 | 1.19 |
Table 3 The acidic amount of hierarchical ZSM-5 via “hard” and “soft” template methods
Catalysts | Acidity/(mmol/g) | ||
---|---|---|---|
Strong acid | Weak acid | Total acid | |
HeZ5 | — | 0.57 | 0.57 |
HeZ5-Ⅰ | 0.11 | 0.18 | 0.29 |
HeZ5-Ⅱ | 0.06 | 0.12 | 0.18 |
HeZ5-Ⅲ | 0.11 | 0.18 | 0.29 |
HeZ5-Ⅳ | — | 0.11 | 0.12 |
HZSM-5[ | 0.36 | 0.83 | 1.19 |
Fig.10 Products carbon yields, carbon conversion yield and gaseous components distribution from catalytic reforming of volatiles over hierarchical ZSM-5
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