TY - JOUR
T1 - Influence of nickel precursors on the properties and performance of Ni impregnated zeolite 5A and 13X catalysts in CO2 methanation
AU - Wei, Liangyuan
AU - Haije, Wim
AU - Kumar, Narendra
AU - Peltonen, Janne
AU - Peurla, Markus
AU - Grenman, Henrik
AU - de Jong, Wiebren
N1 - Funding Information:
The research work is a part of the activities of process and energy department in Delft University of Technology and the Johan Gadolin Process Chemistry Centre. The authors acknowledge the financial support from Åbo Akademi University , The Finnish Society of Science and Letters for Liangyuan’s visiting at Turku , the authors also acknowledge the PhD scholarship awarded to Liangyuan Wei by the China Scholarship Council (CSC) .
Publisher Copyright:
© 2020 The Author(s)
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2021/2/15
Y1 - 2021/2/15
N2 - Zeolite 13X and 5A supported Ni catalysts were synthesized for CO2 methanation using the evaporation impregnation method. The influence of using different Ni precursors (nitrate, citrate, and acetate) as well as calcination temperatures on the catalyst properties and performance were investigated. XRD, SEM-EDX, TEM, STEM-EDX, N2 physisorption, H2-TPR, TPD-NH3 and TG/DTA were used for detailed characterization of the catalysts. The parent structure of the zeolites did not change during catalyst synthesis. Using nickel citrate and acetate resulted in smaller NiO particle size compared to nitrate. STEM-EDX results showed that all the Ni-precursor complexes entered more efficiently the 13X zeolite structure, which is mainly due to steric hindrance resulting from the smaller pore size of 5A. Methanation experiments revealed that the 13X catalysts synthesized using nickel citrate (5% Ni) displayed clearly higher activity, compared to the catalysts synthesized using nickel nitrate or nickel acetate. A 79% conversion at 320 °C was obtained with 100% selectivity towards CH4 and the catalyst showed excellent stability during 200 h testing. Overall, it can be concluded that the Ni precursor significantly influences the physico-chemical characteristics and catalytic properties of Ni 13X and Ni 5A zeolite catalysts in CO2 methanation: complex size and pore size matter.
AB - Zeolite 13X and 5A supported Ni catalysts were synthesized for CO2 methanation using the evaporation impregnation method. The influence of using different Ni precursors (nitrate, citrate, and acetate) as well as calcination temperatures on the catalyst properties and performance were investigated. XRD, SEM-EDX, TEM, STEM-EDX, N2 physisorption, H2-TPR, TPD-NH3 and TG/DTA were used for detailed characterization of the catalysts. The parent structure of the zeolites did not change during catalyst synthesis. Using nickel citrate and acetate resulted in smaller NiO particle size compared to nitrate. STEM-EDX results showed that all the Ni-precursor complexes entered more efficiently the 13X zeolite structure, which is mainly due to steric hindrance resulting from the smaller pore size of 5A. Methanation experiments revealed that the 13X catalysts synthesized using nickel citrate (5% Ni) displayed clearly higher activity, compared to the catalysts synthesized using nickel nitrate or nickel acetate. A 79% conversion at 320 °C was obtained with 100% selectivity towards CH4 and the catalyst showed excellent stability during 200 h testing. Overall, it can be concluded that the Ni precursor significantly influences the physico-chemical characteristics and catalytic properties of Ni 13X and Ni 5A zeolite catalysts in CO2 methanation: complex size and pore size matter.
KW - 13X zeolite
KW - 5A zeolite
KW - Catalytic performance
KW - CO methanation catalyst
KW - Material properties
KW - Ni precursor salt anions
UR - http://www.scopus.com/inward/record.url?scp=85085284778&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2020.05.025
DO - 10.1016/j.cattod.2020.05.025
M3 - Article
AN - SCOPUS:85085284778
SN - 0920-5861
VL - 362
SP - 35
EP - 46
JO - Catalysis Today
JF - Catalysis Today
ER -