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The nature of the deactivation of hydrothermally stable Ni/SiO 2 –Al 2 O 3 catalyst in long-time aqueous phase hydrogenation of crude 1,4-butanediol

The nature of the deactivation of hydrothermally stable Ni/SiO 2 –Al 2 O 3 catalyst in long-time aqueous phase hydrogenation of crude 1,4-butanediol
The nature of the deactivation of hydrothermally stable Ni/SiO 2 –Al 2 O 3 catalyst in long-time aqueous phase hydrogenation of crude 1,4-butanediol

The deactivation of Ni/SiO 2 –Al 2 O 3 catalyst in hydrogenation of crude 1,4-butanediol was investigated. During the operation time of 2140 h, the catalyst showed slow activity decay. Characterization results, for four spent catalysts used at different time, indicated that the main reason of the catalyst deactivation was the deposition of carbonaceous species that covered the active Ni and blocked mesopores of the catalyst. The TPO and SEM measurements revealed that the carbonaceous species included both oligomeric and polymeric species with high C/H ratio and showed sheet. Such carbonaceous species might be eliminated through either direct H 2 reduction or the combined oxidation–reduction methodologies.

1,4-Butanediol, Deactivation, Hydrogenation, Ni/SiO –Al O catalyst, Regeneration
1004-9541
Li, Haitao
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Zhang, Yin
dcb9e86b-6ac3-4a3c-8e71-82c5d4e709af
Zhang, Hongxi
c478c99f-bfc9-4a07-8655-9e100c9c9b73
Qin, Xiaoqin
b2cd1c92-2d3c-409f-8b00-49cb6f536675
Xu, Yalin
95131f12-06f5-414f-8655-66900e3d09ee
Wu, Ruifang
9b3f7158-ecf9-422e-90c6-2181eb58b1ec
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Zhao, Yongxiang
ad91486b-c15f-4cd0-a380-0ba4f8c8d546
Li, Haitao
fb97792b-c451-4886-9f27-ca5a76ff46f1
Zhang, Yin
dcb9e86b-6ac3-4a3c-8e71-82c5d4e709af
Zhang, Hongxi
c478c99f-bfc9-4a07-8655-9e100c9c9b73
Qin, Xiaoqin
b2cd1c92-2d3c-409f-8b00-49cb6f536675
Xu, Yalin
95131f12-06f5-414f-8655-66900e3d09ee
Wu, Ruifang
9b3f7158-ecf9-422e-90c6-2181eb58b1ec
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Zhao, Yongxiang
ad91486b-c15f-4cd0-a380-0ba4f8c8d546

Li, Haitao, Zhang, Yin, Zhang, Hongxi, Qin, Xiaoqin, Xu, Yalin, Wu, Ruifang, Jiang, Zheng and Zhao, Yongxiang (2019) The nature of the deactivation of hydrothermally stable Ni/SiO 2 –Al 2 O 3 catalyst in long-time aqueous phase hydrogenation of crude 1,4-butanediol. Chinese Journal of Chemical Engineering. (doi:10.1016/j.cjche.2019.03.008).

Record type: Article

Abstract

The deactivation of Ni/SiO 2 –Al 2 O 3 catalyst in hydrogenation of crude 1,4-butanediol was investigated. During the operation time of 2140 h, the catalyst showed slow activity decay. Characterization results, for four spent catalysts used at different time, indicated that the main reason of the catalyst deactivation was the deposition of carbonaceous species that covered the active Ni and blocked mesopores of the catalyst. The TPO and SEM measurements revealed that the carbonaceous species included both oligomeric and polymeric species with high C/H ratio and showed sheet. Such carbonaceous species might be eliminated through either direct H 2 reduction or the combined oxidation–reduction methodologies.

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More information

Accepted/In Press date: 14 March 2019
e-pub ahead of print date: 25 March 2019
Keywords: 1,4-Butanediol, Deactivation, Hydrogenation, Ni/SiO –Al O catalyst, Regeneration

Identifiers

Local EPrints ID: 432589
URI: http://eprints.soton.ac.uk/id/eprint/432589
ISSN: 1004-9541
PURE UUID: e785ef6a-4c6c-49cf-beed-d125f0f92a81
ORCID for Zheng Jiang: ORCID iD orcid.org/0000-0002-7972-6175

Catalogue record

Date deposited: 19 Jul 2019 16:32
Last modified: 10 Nov 2021 03:34

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Contributors

Author: Haitao Li
Author: Yin Zhang
Author: Hongxi Zhang
Author: Xiaoqin Qin
Author: Yalin Xu
Author: Ruifang Wu
Author: Zheng Jiang ORCID iD
Author: Yongxiang Zhao

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