Ammonia Synthesis Activity of Alumina-Supported Ruthenium Catalyst Enhanced by Alumina Phase Transformation - Details

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Abstract：

The　increase　of　alumina　calcination　temperature　from　800　°C　to　1300　°C　results　in　the　transformation　of　γ-Al　2　O　3　to　α-Al　2　O　3　phase　accompanying　a　decrease　of　specific　surface　area　and　the　amount　of　tetrahedral　Al　3+　sites.　Over　Ru-Ba/alumina　catalysts,　an　increase　in　alumina　calcination　temperature　would　broaden　the　size　distribution　of　Ru　particles,　enlarge　the　metal-to-oxide　ratio　of　Ru,　decrease　the　amount　of　surface　hydroxyl　groups,　as　well　as　lower　the　temperature　for　N　2　desorption.　As　a　result,　the　increase　of　alumina　calcination　temperature　lessens　the　effect　of　hydrogen　poisoning　and　decreases　the　activation　energy　for　ammonia　synthesis.　The　Ru-Ba/Al　2　O　3　catalyst　with　alumina　calcined　at　980　°C　having　both　Al　2　O　3　and　α-Al　2　O　3　shows　ammonia　synthesis　rate　three　times　higher　than　that　with　alumina　calcined　at　800　°C　having　a　γ-Al　2　O　3　phase.　©　2019　American　Chemical　Society.

Keyword：

alumina; ammonia synthesis; hydroxyl groups; phase transformation; Ru catalyst

Community：

[ 1 ] [Lin, B.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, Fujian, 350002, China
[ 2 ] [Heng, L.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, Fujian, 350002, China
[ 3 ] [Fang, B.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, Fujian, 350002, China
[ 4 ] [Yin, H.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, Fujian, 350002, China
[ 5 ] [Ni, J.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, Fujian, 350002, China
[ 6 ] [Wang, X.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, Fujian, 350002, China
[ 7 ] [Lin, J.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, Fujian, 350002, China
[ 8 ] [Jiang, L.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou, Fujian, 350002, China

Reprint 's Address：

[Lin, B.]National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou UniversityChina

Email：

bylin@fzu.edu.cn

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Source ：

ACS Catalysis

ISSN： 2155-5435

Year： 2019

Issue： 3

Volume： 9

Page： 1635-1644

1 2 . 3 5

JCR@2019

1 1 . 7 0 0

JCR@2023

ESI HC Threshold：184

JCR Journal Grade：1

CAS Journal Grade：2

Cited Count：

WoS CC Cited Count：

SCOPUS Cited Count： 94

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 4

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