Supporting Nickel To Replace Platinum on Zeolite Nanosponges for Catalytic Hydroisomerization of n-Dodecane,ACS Catalysis

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Supporting Nickel To Replace Platinum on Zeolite Nanosponges for Catalytic Hydroisomerization of n-Dodecane
ACS Catalysis ( IF 11.3 ) Pub Date : 2018-10-02 00:00:00 , DOI: 10.1021/acscatal.8b03301
Jaeheon Kim ₁ , Seung Won Han _{1,

2} , Jeong-Chul Kim ₁ , Ryong Ryoo _{1,

2}

Affiliation

Hydroisomerization of linear paraffins to branched isomers is an important petrochemical process, which commonly uses a microporous zeolite catalyst supported with Pt metal nanoparticles. Although attempts were made in the past to find an alternative to costly Pt, replacement with low-cost metals was not successful for conventional bulk zeolites, due to the low metal dispersion resulting in poor catalytic performance. Here, we demonstrate that Ni can replace Pt when it is supported on zeolites with uniform mesopores. Ni-supported MFI-, *MRE-, and TON-type zeolites possessing mesopores showed the same or even better catalytic performance in comparison to that of Pt-supported conventional MFI, *MRE, and TON zeolites, respectively. The Ni-supported zeolites exhibited even better branched isomer yields, despite low Ni loading. This result is ascribed to the confinement or sandwiching effect of Ni nanoparticles by the mesopore walls in the zeolites, which stabilizes the highly dispersed Ni nanoparticles.

中文翻译：

支持镍取代沸石纳米海绵上的铂以催化正十二烷的加氢异构化

线性链烷烃加氢异构化成支链异构体是重要的石油化学工艺，通常使用负载有Pt金属纳米颗粒的微孔沸石催化剂。尽管过去曾尝试寻找昂贵的Pt的替代品，但由于金属的低分散性导致催化性能差，因此对于常规的块状沸石而言，用低成本的金属替代并不成功。在这里，我们证明了当Ni以均匀的中孔负载在沸石上时，它可以代替Pt。具有中孔的镍负载的MFI-，* MRE-和TON型沸石分别具有与Pt负载的常规MFI，* MRE和TON沸石相同或什至更好的催化性能。尽管镍负载量低，但镍负载的沸石仍表现出更好的支化异构体收率。

更新日期：2018-10-02

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