引用本文:
叶天旭, 潘惠芳. 硼酸铵型催化裂化钝镍剂的工业应用及其钝化机理[J]. 应用化学,
2002, 19(1): 34-37.
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.
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.
硼酸铵型催化裂化钝镍剂的工业应用及其钝化机理
English
Mechanism of Ammonium Borate in Passivation of Nickel and Its Application in FCC
Abstract:
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.
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Key words:
- fluid catalytic cracking(FCC)
- / passivator
- / nickel
- / ammonium borate
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