Green synthesis of ZSM-5 using silica fume and catalytic co-cracking of lignin and plastics for production of monocyclic aromatics

doi:10.1016/j.cjche.2023.07.006

中国化学工程学报 ›› 2024, Vol. 65 ›› Issue (1): 92-105.DOI: 10.1016/j.cjche.2023.07.006

• Full Length Article • 上一篇下一篇

Green synthesis of ZSM-5 using silica fume and catalytic co-cracking of lignin and plastics for production of monocyclic aromatics

Hongbing Fu¹, Yufei Gu¹, Tianhua Gao¹, Fuwei Li¹, Hengshuo Gu¹, Hucheng Ge¹, Yuke Liu¹, Zhixia Li¹, Hongfei Lin², Jiangfei Cao³

1 School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China;
2 Guangxi Bossco Environmental Protection Technology Co., Ltd., Nanning 530007, China;
3 School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526000, China

收稿日期:2023-03-31 修回日期:2023-07-25 出版日期:2024-01-28 发布日期:2024-04-17
通讯作者: Zhixia Li,E-mail:zhixiali@gxu.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China (22078076), Guangxi Natural Science Foundation (2020GXNSFAA159174) and the Opening Project of National Enterprise Technology Center of Guangxi Bossco Environmental Protection Technology Co., Ltd (GXU-BFY-2020-005).

Green synthesis of ZSM-5 using silica fume and catalytic co-cracking of lignin and plastics for production of monocyclic aromatics

Hongbing Fu¹, Yufei Gu¹, Tianhua Gao¹, Fuwei Li¹, Hengshuo Gu¹, Hucheng Ge¹, Yuke Liu¹, Zhixia Li¹, Hongfei Lin², Jiangfei Cao³

1 School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China;
2 Guangxi Bossco Environmental Protection Technology Co., Ltd., Nanning 530007, China;
3 School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526000, China

Received:2023-03-31 Revised:2023-07-25 Online:2024-01-28 Published:2024-04-17
Contact: Zhixia Li,E-mail:zhixiali@gxu.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (22078076), Guangxi Natural Science Foundation (2020GXNSFAA159174) and the Opening Project of National Enterprise Technology Center of Guangxi Bossco Environmental Protection Technology Co., Ltd (GXU-BFY-2020-005).

摘要/Abstract

摘要： ZSM-5 with hierarchical pore structure was synthesized by a simple two-step hydrothermal crystallization from silica fume without using any organic ammonium templates. The synthesized ZSM-5 were oval shaped particles with a particle size about 2.0 lm and weak acid-dominated with proper Brønsted (B) and Lewis (L) acid sites. The ZSM-5 was used for catalytic co-cracking of n-octane and guaiacol, low-density polyethylene (LDPE) and alkali lignin (AL) to enhance the production of benzene, toluene, ethylbenzene and xylene (BTEX). The most significant synergistic effect occurred at n-octane/guaiacol at 1:1 and LDPE/AL at 1:3, under the condition, the achieved BTEX selectivity were 24% and 33% (mass) higher than the calculated values (weighted average). The highest BTEX selectivity reached 88.5%, which was 3.7% and 54.2% higher than those from individual cracking LDPE and AL. The synthesized ZSM-5 exhibited superior catalytic performance compared to the commercial ZSM-5, indicating potential application prospect.

关键词: Silica fume, ZSM-5, Catalytic co-cracking, Plastics, Lignin

Abstract: ZSM-5 with hierarchical pore structure was synthesized by a simple two-step hydrothermal crystallization from silica fume without using any organic ammonium templates. The synthesized ZSM-5 were oval shaped particles with a particle size about 2.0 lm and weak acid-dominated with proper Brønsted (B) and Lewis (L) acid sites. The ZSM-5 was used for catalytic co-cracking of n-octane and guaiacol, low-density polyethylene (LDPE) and alkali lignin (AL) to enhance the production of benzene, toluene, ethylbenzene and xylene (BTEX). The most significant synergistic effect occurred at n-octane/guaiacol at 1:1 and LDPE/AL at 1:3, under the condition, the achieved BTEX selectivity were 24% and 33% (mass) higher than the calculated values (weighted average). The highest BTEX selectivity reached 88.5%, which was 3.7% and 54.2% higher than those from individual cracking LDPE and AL. The synthesized ZSM-5 exhibited superior catalytic performance compared to the commercial ZSM-5, indicating potential application prospect.

Key words: Silica fume, ZSM-5, Catalytic co-cracking, Plastics, Lignin

Hongbing Fu, Yufei Gu, Tianhua Gao, Fuwei Li, Hengshuo Gu, Hucheng Ge, Yuke Liu, Zhixia Li, Hongfei Lin, Jiangfei Cao. Green synthesis of ZSM-5 using silica fume and catalytic co-cracking of lignin and plastics for production of monocyclic aromatics[J]. 中国化学工程学报, 2024, 65(1): 92-105.

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Green synthesis of ZSM-5 using silica fume and catalytic co-cracking of lignin and plastics for production of monocyclic aromatics

Green synthesis of ZSM-5 using silica fume and catalytic co-cracking of lignin and plastics for production of monocyclic aromatics

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