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Citation: YE Tian-Xu, PAN Hui-Fang. Mechanism of Ammonium Borate in Passivation of Nickel and Its Application in FCC[J]. Chinese Journal of Applied Chemistry, ;2002, 19(1): 34-37. shu

Mechanism of Ammonium Borate in Passivation of Nickel and Its Application in FCC

YE Tian-Xu ^a,, ,
PAN Hui-Fang ^b

1.
a Department of Chemistry and Chemical Engineering, University of Petroleum(Dongying Campus), Donggying 257061;
2.
b Department of Chemistry and Chemical Engineering, University of Petroleum(Beijing Campus), Beijing

Corresponding author: YE Tian-Xu,
Received Date: 24 May 2001
Available Online: 16 October 2001
Fund Project: 中国石油天然气集团公司"九五"科技攻关项目((96)科字第198号) ((96)科字第198号)

A non-toxic ammonium borate containing mixture(named BPN) was found to decrease the yields of hydrogen and coke by 35% and 10%, respectively, and increase the yield of gasoline by 1.2%. The passivating mechanism of BPN has been investigated by MAT, TPR, TPD and XRD techniques with simultaneous quantum chemistry calculation. The results showed that Ni₂B₂O₅ was formed in addition of BPN to Ni-deposited zeolite under the condition of FCC regeneration. Ni₂B₂O₅ is more difficult to be reduced than NiO under the condition of FCC reaction due to the much higher LUMO energy than that in NiO. The dehydrogenation activity of Ni⁰ is thus to be inhibited.
- fluid catalytic cracking(FCC),
- passivator,
- nickel,
- ammonium borate
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