scholarly journals Reactive adsorption desulfurization of NiO and Ni0 over NiO/ZnO–Al2O3–SiO2 adsorbents: role of hydrogen pretreatment

RSC Advances ◽  
2018 ◽  
Vol 8 (58) ◽  
pp. 33354-33360 ◽  
Author(s):  
Feng Ju ◽  
Miao Wang ◽  
Hui Luan ◽  
Pengyu Du ◽  
Zhihe Tang ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Reactive Adsorption ◽  
Adsorption Desulfurization ◽  
Hydrogen Pretreatment

A possible reaction mechanism of desulfurization on NiO/ZnO–Al2O3–SiO2 is discussed.

Density Functional Theory Study of Thiophene Desulfurization and Conversion of Desulfurization Product on Ni(111) Surface and Ni55 Cluster: Implication for the Mechanism of Reactive Adsorption Desulfurization over Ni/ZnO Catalysts

2021 ◽  
Author(s):  
Houyu Zhu ◽  
Xin Li ◽  
Naiyou Shi ◽  
Xuefei Ding ◽  
Zehua Yu ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Reaction Mechanism ◽  
Active Center ◽  
Density Functional ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Reactive Adsorption ◽  
Adsorption Desulfurization

Ni/ZnO catalysts have been well recognized by industry and academia for exhibiting excellent desulfurization activities. However, intrinsic reaction mechanism on Ni active center is still obscure. Herein, we performed periodic...

Ni/ZnO Nano Sorbent for Reactive Adsorption Desulfurization of Refinery Oil Streams

2016 ◽  
pp. 216-239 ◽  
Author(s):  
Hui Ge ◽  
Mingxing Tang ◽  
Xiao-Dong Wen
Keyword(s):  
Reaction Mechanism ◽  
Phase Change ◽  
Reactive Adsorption ◽  
Sulfur Transfer ◽  
Active Structures ◽  
Dynamic Phase ◽  
Adsorption Desulfurization ◽  
Sulfur Adsorption

The aim of this chapter is to present the Ni/ZnO nano-sorbent for reactive adsorption desulfurization (RADS) of refinery oil steams. The preparation and modification of nano-sorbent are reviewed. Various characterizations involving in the relation of properties with components, structures and dynamic phase change during RADS, are extensively provided. The mechanisms of desulfurization, sulfur transfer and sulfur adsorption are proposed. The contradictories in literature about active structures and reaction mechanism are discussed and the solutions are suggested. This chapter unfolds the impressive application of RADS of Ni/ZnO nano-sorbent to produce a cleaner gasoline. It also delves into the inadequately engineer areas which require further attention so as to make the RADS process more economic and more efficient. The perspective applications other than gasoline desulfurization are also presented.

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

Catalysts ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 79 ◽  
Author(s):  
Feng Ju ◽  
Miao Wang ◽  
Tian Wu ◽  
Hao Ling
Keyword(s):  
Energy Consumption ◽  
Reaction Temperature ◽  
Active Component ◽  
Reduction Temperature ◽  
Primary Condition ◽  
Reactive Adsorption ◽  
Hydrotreating Catalyst ◽  
Adsorption Desulfurization ◽  
Role Based

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.

Reactive adsorption of thiophene on Ni/ZnO: Role of hydrogen pretreatment and nature of the rate determining step

2008 ◽  
Vol 84 (3-4) ◽  
pp. 766-772 ◽  
Author(s):  
Andrey Ryzhikov ◽  
Igor Bezverkhyy ◽  
Jean-Pierre Bellat
Keyword(s):  
Reactive Adsorption ◽  
Rate Determining Step ◽  
Hydrogen Pretreatment

scholarly journals Highly stable Ni/ ZnO‐Al 2 O 3 adsorbent promoted by TiO 2 for reactive adsorption desulfurization

EcoMat ◽  
2021 ◽  
Author(s):  
Bowen Liu ◽  
Peng Bai ◽  
Yang Wang ◽  
Zhun Dong ◽  
Pingping Wu ◽  
...  
Keyword(s):  
Reactive Adsorption ◽  
Adsorption Desulfurization

Oxidations ofNω-Hydroxyarginine Analogues and VariousN-Hydroxyguanidines by NO Synthase II: Key Role of Tetrahydrobiopterin in the Reaction Mechanism and Substrate Selectivity

2001 ◽  
Vol 14 (2) ◽  
pp. 202-210 ◽  
Author(s):  
Catherine Moali ◽  
Jean-Luc Boucher ◽  
Axelle Renodon-Corniere ◽  
Dennis J. Stuehr ◽  
Daniel Mansuy
Keyword(s):  
Reaction Mechanism ◽  
No Synthase ◽  
Substrate Selectivity

Reaction Mechanism and Role of the Support in the Partial Oxidation of Methane on Rh/Al2O3

1996 ◽  
Vol 159 (2) ◽  
pp. 418-426 ◽  
Author(s):  
Dezheng Wang ◽  
Olivier Dewaele ◽  
Ann M.De Groote ◽  
Gilbert F. Froment
Keyword(s):  
Reaction Mechanism ◽  
Partial Oxidation ◽  
Partial Oxidation Of Methane ◽  
Oxidation Of Methane

Reactive Adsorption Desulfurization on Cu/ZnO Adsorbent: Effect of ZnO Polarity Ratio on Selective Hydrogenation

2017 ◽  
Vol 31 (9) ◽  
pp. 9930-9938 ◽  
Author(s):  
Yaqing Liu ◽  
Hongying Wang ◽  
Yunqi Liu ◽  
Jinchong Zhao ◽  
Chenguang Liu
Keyword(s):  
Selective Hydrogenation ◽  
Reactive Adsorption ◽  
Adsorption Desulfurization
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