ZHAO Zhihua,XU Chenghua,REN Hong,et al.Pore-forming agent induced synthesis of FeCoCuAl catalysts and their performance in hydrogenation of CO2 to high carbon hydrocarbons with ZSM-5[J].Low-carbon Chemistry and Chemical Engineering,2024,49(02):10-16.
ZHAO Zhihua,XU Chenghua,REN Hong,et al.Pore-forming agent induced synthesis of FeCoCuAl catalysts and their performance in hydrogenation of CO2 to high carbon hydrocarbons with ZSM-5[J].Low-carbon Chemistry and Chemical Engineering,2024,49(02):10-16. DOI: 10.12434/j.issn.2097-2547.20230234.
Pore-forming agent induced synthesis of FeCoCuAl catalysts and their performance in hydrogenation of CO2 to high carbon hydrocarbons with ZSM-5
) is one of the important ways to synthesize high-value chemicals and fuels
which can achieve carbon emission reduction as well as help to alleviate energy pressure. K- and Na-modified FeCoCuAl catalysts were prepared by precipitation and iso-volumetric impregnation methods
and the effects of the pore-forming agent 1
3
5-benzenetricarboxylic acid (BTA) on their catalytic performance in CO
2
-catalyzed hydrogenation to high-carbon hydrocarbons reaction(temperature of 300 ℃
pressure of 2.0 MPa
n
(H
2
):
n
(CO
2
) = 3:1 and space velocity of 3600 h
-1
of feed gas
reaction for 6 h) were investigated. ZSM-
5 molecular sieve was introduced into FeCoCuAl-20.0BTA catalyst (
n
(BTA):
n
(Fe) = 20.0%) to construct a series of composite catalysts and their catalytic performance in the reaction of catalytic hydrogenation of CO
2
to high-carbon hydrocarbons was investigated. The physicochemical properties of the catalysts were characterized by combining N
2
adsorption/desorption
X ray diffraction (XRD)
H
2
-temperature programmed reduction (H
2
-TPR)
CO
2
temperature programmed desorption (CO
2
-TPD)
and H
2
temperature programmed desorption (CO
2
-TPD)
and the oil-phase compositions of the products were analyzed by GC-MS. The results show that compared with FeCoCuAl catalysts
the specific surface area and pore volume of FeCoCuAl-BTA catalysts increase
and generate more surface-active species (Fe or Fe-Co alloy)
which lead to better catalytic performance of FeCoCuAl-BTA catalysts in CO
2
catalytic hydrogenation reaction. The CO
2
conversion rate and C
5+
selectivity of FeCoCuAl-20.0BTA catalyst are up to 70% and 42%
respectively
and the products generated from CO
2
hydrogenation catalyzed by FeCoCuAl-20.0BTA catalyst are mainly C
2
~C
4
products
while on the composite catalyst constructed with FeCoCuAl-20.0BTA catalyst and ZSM-5 molecular sieve in the form of mechanical mixing of particles with the mass ratio of 1.0
the C
2
~C
4
products generated on FeCoCuAl-20.0BTA can undergo in situ chain growth
isomerization and aromatization reactions on ZSM-5 molecular sieves
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