Investigation on Deactivation of K-promoted Ru Catalyst for Ammonia Synthesis by CO Formation - Details

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Abstract：

The　prevailing　view　of　the　deactivation　of　carbon-supported　Ru　catalyst　in　ammonia　synthesis　is　carbon　methanation,　but　those　strategies　focusing　on　inhibiting　carbon　methanation　cannot　effectively　solve　the　challenge　of　Ru/C　catalysts.　Herein　we　prepared　four　K-promoted　Ru　catalysts　with　different　Ru　loadings　and　treated　the　samples　at　450　or　500　°C　under　1　MPa　during　ammonia　synthesis　reaction.　The　result　showed　that　the　presence　of　a　larger　amount　of　Ru　species　enhanced　methane　formation　at　the　reaction　temperature,　which　was　irrelevant　to　the　loss　in　activity　of　ammonia　synthesis.　On　the　contrary,　CO　formation　along　with　a　great　decline　in　catalytic　activity　can　be　observed　when　Ru　catalysts　are　heated　at　500　°C.　The　characterization　results　indicated　that　the　severe　depletion　of　surface　oxygen　groups　following　the　CO-formation　pathway,　resulting　in　the　notable　decrease　in　the　amount　of　gas　adsorption,　contributed　to　the　deactivation　of　carbon-supported　Ru　catalyst.　©　2020　Wiley-VCH　Verlag　GmbH　&　Co.　KGaA,　Weinheim

Keyword：

Ammonia synthesis; Carbon; Deactivation; Oxidation; Ruthenium

Community：

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

Reprint 's Address：

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

Email：

bylin@fzu.edu.cn

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ChemistrySelect

ISSN： 2365-6549

Year： 2020

Issue： 22

Volume： 5

Page： 6639-6645

2 . 1 0 9

JCR@2020

2 . 1 0 0

JCR@2022

ESI HC Threshold：139

JCR Journal Grade：3

CAS Journal Grade：4

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WoS CC Cited Count：

SCOPUS Cited Count： 7

ESI Highly Cited Papers on the List： 0 Unfold All

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Chinese Cited Count：

30 Days PV： 0

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