Thermal regeneration of spent CeY sorbent used for thiophene adsorption from benzene

LV longfei; LIAO Junjie; XIE Yuanyuan; FAN Lijun; CHANG Liping; BAO Weiren

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Thermal regeneration of spent CeY sorbent used for thiophene adsorption from benzene

LV longfei,LIAO Junjie #,XIE Yuanyuan,FAN Lijun,CHANG Liping,BAO Weiren *

State Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and the Ministry of Science and Technology, Taiyuan University of Technology, Taiyuan 030024

*Correspondence author

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Funding: Research Fund for Doctoral Program of Higher Education of China （No.20131402110010）, National Natural Science Foundation of China （No.51242003, 51372161）

Opened online:12 August 2016

Accepted by: none

Citation: LV longfei,LIAO Junjie,XIE Yuanyuan.Thermal regeneration of spent CeY sorbent used for thiophene adsorption from benzene[OL]. [12 August 2016] http://en.paper.edu.cn/en_releasepaper/content/4701982

Benzene is an important chemical raw material, and coking benzene is one of its main resources, so the thiophene impurity should be deeply removed. The CeY adsorbent prepared by NaY zeolite ion-exchanging by cerium ion has been reported an excellent adsorption desulfurization ability. Thus it is necessary to investigate its regeneration behavior. In this paper, the spent CeY sorbent adsorbing thiophene in benzene (TBY) was regenerated by thermal treatment under various conditions. The desulfurization efficiency of regenerated TBY samples was measured by static adsorption experiment. The results show that the regeneration temperature, regeneration time and oxygen content are the main influence factors for the regeneration of TBY samples. The regenerated performance of sorbent is mainly affected by sulfur and carbon content remained. The optimized regeneration condition is air atmosphere with the space velocity of 1000 h-1 at 500 oC for 1 h, and the corresponding desulfurization efficiency of regenerated TBY sample is over 96%.

Keywords:CeY sorbent; thermal regeneration; thiophene; benzene; desulfurization

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