Reactive adsorption desulfurization coupling aromatization on Ni/ZnO-Zn6Al2O9 prepared by ZnxAly(OH)2(CO3)z·xH2O precursor for FCC gasoline

Wang, Tinghai; Wang, Xueli; Gao, Yuan; Su, Yi; Miao, Zhichao; Wang, Chenchen; Lu, Longgang; Chou, Lingjun; Gao, Xionghou

doi:10.1016/j.jechem.2015.07.002

Cited by 19 publications

(6 citation statements)

References 29 publications

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“…Many publications discussed the mechanism of RADS over Ni/ZnO-based adsorbent [8][9][10][11][12][13]. Babich and Moulijin [14] first proposed a mechanism of RADS over Ni/ZnO-based adsorbent.…”

Section: Introductionmentioning

confidence: 99%

The Role of NiO in Reactive Adsorption Desulfurization Over NiO/ZnO-Al2O3-SiO2 Adsorbent

Wang

et al. 2019

Catalysts

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The reactive adsorption desulfurization (RADS) of a model gasoline n-hexane containing thiophene was carried out with a NiO/ZnO-Al2O3-SiO2 adsorbent in N2 and H2, respectively. A declining RADS trend has been observed in N2, without the presence of H2, indicating that NiO is sulfurized and exhibits activity for RADS. TPR and XPS results presented NiO in the adsorbent is hard to be reduced because of the powerful interaction between NiO and the support. The sulfurization of NiO into NiSx is a primary condition for the RADS process, the same as the presulfurization of hydrotreating catalyst, while metallic Ni is an intermediate reduction product of NiSx. Results of a low RADS temperature at 300 °C, much lower than the reduction temperature of NiO, suggest that NiO plays an important role. Based on assumption of NiO as the main active component, the RADS could reduce the reaction temperature and energy consumption significantly. The participation of hydrogen and n-hexane in pretreatment conducted at 420 °C contributes to the activation of adsorbent. Also, these methods of pretreatment improved the desulfurization performance under the reaction temperature of 300 °C.

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Section: Introductionmentioning

confidence: 99%

The Role of NiO in Reactive Adsorption Desulfurization Over NiO/ZnO-Al2O3-SiO2 Adsorbent

Wang

et al. 2019

Catalysts

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“…As fuel oils will remain as the main energy source for vehicles in the coming decades, 10 the development of efficient desulfurization technologies is still important due to the more stringent environmental regulations for clean fuel oils 11,12 . Due to its advantages of low octane loss, low hydrogen consumption and mild operation conditions, the reactive adsorption desulfurization (RADS) technique has become a commercial process named as S‐Zorb to produce clean gasoline of Stage V (less than 10 μg/g sulfur) in China 13‐17 …”

Section: Introductionmentioning

confidence: 99%

Highly stable Ni/ZnO‐Al₂O₃ adsorbent promoted by TiO₂ for reactive adsorption desulfurization

Liu

Peng

Yang

et al. 2021

EcoMat

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The reactive adsorption desulfurization is an important and efficient technology for the ultra‐deep desulfurization of gasoline. The performance of an adsorbent is vital for the efficiency of the reactive adsorption desulfurization process. The formation of inert spinels is commonly recognized for the deactivation of adsorbents. In this work, TiO2 was incorporated in the Ni/ZnO‐Al2O3 adsorbent to inhibit the formation of the spinel phase. The TiO2 formed a stable protection layer on the surface of Al2O3, which prevented the interaction between Al2O3 and ZnO, inhibiting the formation of the ZnAl2O4 spinel phase. The introduction of TiO2 significantly improved the stability of the adsorbents during cyclic hydrothermal treatments, while the sulfur capacity slightly dropped. Characterization results revealed that TiO2 was homogeneously dispersed on the surface of Al2O3 support and the incorporation of TiO2 could maintain a certain amount of Lewis acid sites in the adsorbents, which are favorable for the adsorption of organo‐sulfur compounds.

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“…Stringent environmental regulations become a major driving force for the production of ultraclean fuels . Nitrogen compounds in liquid fuel inhibit the hydrodesulfurization (HDS) process by being adsorbed on the acidic sites of catalyst, especially when the amounts of sulfur and nitrogen compounds are comparable. , Combined with the advantages of both the catalytic HDS and adsorption desulfurization, reactive adsorption desulfurization (RADS), as one of the most effective desulfurization process, could save the cost of hydrogen and reduce the loss of octane number. , According to the mechanism of RADS over Ni/ZnO-based adsorbent, − in the presence of hydrogen, sulfur atoms combine with reduced nickel atoms to form NiS x, which is reduced in situ to Ni 0 . Meanwhile, H 2 S released reacts immediately with ZnO to form ZnS.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nitrogen Compounds on Reactive Adsorption Desulfurization over NiO/ZnO-Al₂O₃-SiO₂ Adsorbents

Wang

et al. 2019

Ind. Eng. Chem. Res.

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The effect of nitrogen compounds in FCC gasoline on reactive adsorption desulfurization (RADS)was investigated over NiO/ZnO-Al2O3–SiO2 adsorbents. On the basis of ammonia temperature-programmed desorption (TPD), pyridine infrared radiation (Py-IR), and X-ray diffraction (XRD), adsorbents calcinated at 500 °C exhibit weak acidity and strong acidity, high Brδnsted acidity, and good dispersion of the active components. High Brδnsted acidity adsorbent presents the best RADS ability, contributing to adsorption and removal of nitrogen compounds. The results show that the basic nitrogen quinoline and pyridine inhibit significantly RADS, but the nonbasic nitrogen carbazole only affects RADS mildly. The order of inhibition is quinoline > pyridine > carbazole.

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Reactive adsorption desulfurization coupling aromatization on Ni/ZnO-Zn6Al2O9 prepared by ZnxAly(OH)2(CO3)z·xH2O precursor for FCC gasoline

Cited by 19 publications

References 29 publications

The Role of NiO in Reactive Adsorption Desulfurization Over NiO/ZnO-Al2O3-SiO2 Adsorbent

The Role of NiO in Reactive Adsorption Desulfurization Over NiO/ZnO-Al2O3-SiO2 Adsorbent

Highly stable Ni/ZnO‐Al₂O₃ adsorbent promoted by TiO₂ for reactive adsorption desulfurization

Effect of Nitrogen Compounds on Reactive Adsorption Desulfurization over NiO/ZnO-Al₂O₃-SiO₂ Adsorbents

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Reactive adsorption desulfurization coupling aromatization on Ni/ZnO-Zn6Al2O9 prepared by ZnxAly(OH)2(CO3)z·xH2O precursor for FCC gasoline

Cited by 19 publications

References 29 publications

The Role of NiO in Reactive Adsorption Desulfurization Over NiO/ZnO-Al2O3-SiO2 Adsorbent

The Role of NiO in Reactive Adsorption Desulfurization Over NiO/ZnO-Al2O3-SiO2 Adsorbent

Highly stable Ni/ZnO‐Al2O3 adsorbent promoted by TiO2 for reactive adsorption desulfurization

Effect of Nitrogen Compounds on Reactive Adsorption Desulfurization over NiO/ZnO-Al2O3-SiO2 Adsorbents

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Highly stable Ni/ZnO‐Al₂O₃ adsorbent promoted by TiO₂ for reactive adsorption desulfurization

Effect of Nitrogen Compounds on Reactive Adsorption Desulfurization over NiO/ZnO-Al₂O₃-SiO₂ Adsorbents