Reactive adsorption desulfurization over a Ni/ZnO adsorbent prepared by homogeneous precipitation

doi:10.1007/s11705-013-1322-9

Front Chem Sci Eng

2013, Vol. 7

Issue (2) : 170-176 https://doi.org/10.1007/s11705-013-1322-9

RESEARCH ARTICLE

Reactive adsorption desulfurization over a Ni/ZnO adsorbent prepared by homogeneous precipitation

Aihua KONG¹, Yanyu WEI¹, Yonghong LI^1,2(

)

1. Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, China; 2. National Engineering Research Center for Distillation Technology, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, China

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Abstract

A high-performance Ni/ZnO adsorbent was prepared by homogeneous precipitation using urea hydrolysis and characterized by N₂ adsorption-desorption, X-ray diffraction (XRD), and scanning electron microscope (SEM). The adsorbent was applied to the deep desulfurization of gasoline and showed a high breakthrough sulfur capacity and a remarkably high volume hourly space velocity. The effects of coexisting olefins in gasoline as well as adsorptive conditions on the adsorptive performance were examined. It was found that olefins in gasoline had a slightly inhibiting effect on the desulfurization performance of the adsorbent. The optimum conditions were 673 K, 1.0 Mpa with a volume hourly space velocity of 60 h^-1. Under the optimum conditions, ultralow sulfur gasoline could be produced and the breakthrough sulfur capacity of the adsorbent was 360 mg-s/g-sorb for the model gasoline.

Keywords nickel reactive adsorption desulfurization thiophene

Corresponding Author(s): LI Yonghong,Email:yhli@tju.edu.cn

Issue Date: 05 June 2013

Cite this article:

Aihua KONG,Yanyu WEI,Yonghong LI. Reactive adsorption desulfurization over a Ni/ZnO adsorbent prepared by homogeneous precipitation[J]. Front Chem Sci Eng, 2013, 7(2): 170-176.

URL:

https://academic.hep.com.cn/fcse/EN/10.1007/s11705-013-1322-9
https://academic.hep.com.cn/fcse/EN/Y2013/V7/I2/170

Fig.1 XRD patterns of adsorbents. (a) after calcinations; (b) after reduction at = 450oC and = 0.5 MPa for 2 h; (c) after sulfidation at = 400oC, = 1.0 MPa, LHSV= 60 h, and H/O= 0.3 for 80 h

Tab.1 Specific surface area () and pore volume () of samples

Fig.2 SEM micrograph of Ni/ZnO adsorbent

Fig.3 Sulfur concentration of Ni/ZnO as a function of adsorption temperature at LHSV= 60 h, H/O= 0.3 and sulfur content in feed (A) = 100 mg/L

Fig.4 Breakthrough curves over Ni/ZnO adsorbents at = 1.0 MPa, LHSV= 60 h and H/O= 0.3. (a) = 300oCβ; (b) = 400oC; (c) = 500oC

Fig.5 Sulfur concentration of Ni/ZnO depending on adsorption pressure at LHSV= 60 h, H/O= 0.3, and sulfur content in feed (A) = 100 mg/L

Fig.6 Breakthrough curves over Ni/ZnO adsorbents at 400oC, LHSV= 60 h and H/O= 0.3. (a) = 0.5 MPa; (b) = 1.0 MPa; (c) = 1.5 Mpa

Fig.7 Sulfur concentration of Ni/ZnO depending on LHSVs at = 400°C, = 1.0 MPa, H/O= 0.3, and sulfur content in feed (A) = 100 mg/L

Fig.8 Breakthrough curves of Ni/ZnO adsorbent at = 400°C, = 1.0 MPa, LHSV= 60 h, H/O= 0.3, and sulfur content in two model gasoline 100 ppmw

Fig.9 Dependence of hydrocarbon group composition of model gasoline B product on the adsorption time at = 573 K, = 1.0 MPa, LHSV= 60 h, H/O= 0.3

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