Catalytic cracking of 1-butene to propylene by Ag modified HZSM-5

doi:10.1016/j.cjche.2015.01.008

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (7): 1131-1137.DOI: 10.1016/j.cjche.2015.01.008

• 催化、动力学与反应工程 • 上一篇下一篇

Catalytic cracking of 1-butene to propylene by Ag modified HZSM-5

Rongrong Zhang, Zhengbao Wang

College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China

收稿日期:2014-09-16 修回日期:2015-01-20 出版日期:2015-07-28 发布日期:2015-08-21
通讯作者: Zhengbao Wang
基金资助:
Supported by the National Science Foundation of China (U1162129) and the Science and Technology Department of Zhejiang Province (2009R50020).

Catalytic cracking of 1-butene to propylene by Ag modified HZSM-5

Rongrong Zhang, Zhengbao Wang

College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China

Received:2014-09-16 Revised:2015-01-20 Online:2015-07-28 Published:2015-08-21
Contact: Zhengbao Wang
Supported by:
Supported by the National Science Foundation of China (U1162129) and the Science and Technology Department of Zhejiang Province (2009R50020).

摘要/Abstract

摘要： Silver modified HZSM-5 (AgHZ) zeolite catalysts were prepared by ion exchange method and their catalytic properties in the 1-butene cracking reaction were measured. The catalysts were characterized by infrared spectroscopy with pyridine adsorption (Py-IR), N₂ adsorption and X-ray diffraction (XRD). The effects of Ag loading and steaming treatment on catalytic performances were studied. It is found that the activity of HZSM-5 (HZ) catalyst significantly decreases with the steaming time,whereas AgHZ catalysts show stable activity in the steaming time of 24-48 h and their activities increase with the Ag loading.When the steaming time is 24-48 h, the yield of propylene over HZ catalyst significantly decreases, whereas it is stable over AgHZ catalysts. The AgHZ catalysts with Ag loadings of 0.28%-0.43% (by mass) show similar propylene yields (~30%), which are higher than that over the AgHZ catalyst with a Ag loading of 0.55% (by mass). These results indicate that the steam-treated AgHZ catalysts with optimum Ag loadings have higher yield of propylene and are more stable than the steamtreated HZ catalyst. The regeneration stability measurement in butene cracking also shows that the AgHZ catalyst steam-treated under a suitable condition has better stability than the HZ catalyst.

关键词: 1-Butene, Propylene, Cracking, HZSM-5, Zeolite, Silver

Abstract: Silver modified HZSM-5 (AgHZ) zeolite catalysts were prepared by ion exchange method and their catalytic properties in the 1-butene cracking reaction were measured. The catalysts were characterized by infrared spectroscopy with pyridine adsorption (Py-IR), N₂ adsorption and X-ray diffraction (XRD). The effects of Ag loading and steaming treatment on catalytic performances were studied. It is found that the activity of HZSM-5 (HZ) catalyst significantly decreases with the steaming time,whereas AgHZ catalysts show stable activity in the steaming time of 24-48 h and their activities increase with the Ag loading.When the steaming time is 24-48 h, the yield of propylene over HZ catalyst significantly decreases, whereas it is stable over AgHZ catalysts. The AgHZ catalysts with Ag loadings of 0.28%-0.43% (by mass) show similar propylene yields (~30%), which are higher than that over the AgHZ catalyst with a Ag loading of 0.55% (by mass). These results indicate that the steam-treated AgHZ catalysts with optimum Ag loadings have higher yield of propylene and are more stable than the steamtreated HZ catalyst. The regeneration stability measurement in butene cracking also shows that the AgHZ catalyst steam-treated under a suitable condition has better stability than the HZ catalyst.

Key words: 1-Butene, Propylene, Cracking, HZSM-5, Zeolite, Silver

Rongrong Zhang, Zhengbao Wang. Catalytic cracking of 1-butene to propylene by Ag modified HZSM-5[J]. Chinese Journal of Chemical Engineering, 2015, 23(7): 1131-1137.

Rongrong Zhang, Zhengbao Wang. Catalytic cracking of 1-butene to propylene by Ag modified HZSM-5[J]. Chin.J.Chem.Eng., 2015, 23(7): 1131-1137.

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Catalytic cracking of 1-butene to propylene by Ag modified HZSM-5

Catalytic cracking of 1-butene to propylene by Ag modified HZSM-5

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