Effect of pore-size distribution on Ru/ZSM-5 catalyst for enhanced N2 activation to ammonia via dissociative mechanism - Details

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Abstract：

In　the　present　study,　a　series　of　Ru/ZSM-5　catalysts　with　different　pore-size　distributions　were　prepared　and　investigated　for　NH3　synthesis.　Our　studies　indicate　that　Ru/ZSM-5-Mic　with　micropore　structure　exhibits　superior　NH3　synthesis　rate,　which　is　much　higher　than　those　of　Ru/ZSM-5-Mac　(with　macroporous　structure)　and　Ru/ZSM-5-Mes　(with　mesoporous　structure)　catalysts.　A　series　of　TPD　experiments　demonstrate　that　pore-size　distributions　play　an　important　role　in　N2　adsorption　and　activation　over　Ru/ZSM-5.　Moreover,　the　addition　of　La　significantly　promotes　the　NH3　synthesis　performance　over　Ru/ZSM-5-Mic.　Additionally,　in　situ　DRIFTS　studies　indicate　that　the　main　intermediate　species　over　Ru/ZSM-5-Mic　are　–NH2,　and　most　of　the　surface　hydrogen　species　desorb　following　the　H2O-formation　pathway.　©　2020

Keyword：

Ammonia Catalysts Chemical activation Pore size Ruthenium compounds Size distribution

Community：

[ 1 ] [Cai, Jihui]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou; 350002, China
[ 2 ] [Wang, Congying]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou; 350002, China
[ 3 ] [Liu, Yi]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou; 350002, China
[ 4 ] [Ni, Jun]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou; 350002, China
[ 5 ] [Lin, Bingyu]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou; 350002, China
[ 6 ] [Wang, Xiuyun]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou; 350002, China
[ 7 ] [Lin, Jianxin]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou; 350002, China
[ 8 ] [Jiang, Lilong]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou; 350002, China

Reprint 's Address：

[wang, xiuyun]national engineering research center of chemical fertilizer catalyst, fuzhou university, fuzhou; 350002, china

Email：

jll@fzu.edu.cnemailxywang2017@fzu.edu.cn) Wang, Xiuyun(xywang2017@fzu.edu.cn

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Source ：

Journal of Rare Earths

ISSN： 1002-0721

Year： 2020

Issue： 8

Volume： 38

Page： 873-882

5 . 2 0 0

JCR@2023

ESI HC Threshold：160

JCR Journal Grade：2

CAS Journal Grade：2

Cited Count：

WoS CC Cited Count：

SCOPUS Cited Count： 11

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 0

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