TY - JOUR
T1 - Hydrogen production over Rh/Ce-MCM-41 catalysts via ethanol steam reforming
AU - González Vargas, O. A.
AU - De Los Reyes Heredia, J. A.
AU - Wang, J. A.
AU - Chen, L. F.
AU - Montesinos Castellanos, A.
AU - Llanos, M. E.
N1 - Funding Information:
O.A. González Vargas acknowledges the scholarship for his study of the doctorate degree offered by the CONACyT and UAM-I, Mexico. We acknowledge the help of Alejandro Toriello in the catalytic activity measurements. The authors would like to acknowledge the financial support from Instituto Politécnico Nacional , Mexico ( SIP-20130640 , SIP-20130520 and SIP-20131760 ).
PY - 2013/10/25
Y1 - 2013/10/25
N2 - 1 wt%Rh/Ce-MCM-41 catalysts were synthesized using Ce-MCM-41 as support where Si/Ce molar ratio varied from 10 to 30 and 50. During hydrogen reduction process, metallic Rh particles were formed on the Ce-MCM-41 at around 130 °C with an average particle size 6.8 nm. These catalysts were tested in the ethanol steam reforming (ESR) under atmospheric pressure between 225 and 425 °C. Compared to Rh/MCM-41 catalyst, cerium introduction would significantly enhance both the catalytic activity and hydrogen yield by approximately 2e3 times. However, the amount and the method of Ce incorporation in the framework of MCM-41 could greatly impact the catalytic performance of the Rh/Ce-MCM- 41 catalysts. The ethanol conversion at 425 °C over the Rh/Ce-MCM-41 catalysts increased from 90.0% to 95.1% and 99.9%, as the Si/Ce molar ratio increases from 10 to 30 and 50. However, product selectivity is almost independent of the cerium content. The direct hydrothermal method of introducing Ce into the framework of MCM-41 is much superior to the impregnation route in the ESR reaction. After 6 h of reaction, the catalysts remain the mesostructure and the chemical state of cerium ions unchanged. Trace coke with graphitelike structure deposited on the surface does not modify the catalytic performance.
AB - 1 wt%Rh/Ce-MCM-41 catalysts were synthesized using Ce-MCM-41 as support where Si/Ce molar ratio varied from 10 to 30 and 50. During hydrogen reduction process, metallic Rh particles were formed on the Ce-MCM-41 at around 130 °C with an average particle size 6.8 nm. These catalysts were tested in the ethanol steam reforming (ESR) under atmospheric pressure between 225 and 425 °C. Compared to Rh/MCM-41 catalyst, cerium introduction would significantly enhance both the catalytic activity and hydrogen yield by approximately 2e3 times. However, the amount and the method of Ce incorporation in the framework of MCM-41 could greatly impact the catalytic performance of the Rh/Ce-MCM- 41 catalysts. The ethanol conversion at 425 °C over the Rh/Ce-MCM-41 catalysts increased from 90.0% to 95.1% and 99.9%, as the Si/Ce molar ratio increases from 10 to 30 and 50. However, product selectivity is almost independent of the cerium content. The direct hydrothermal method of introducing Ce into the framework of MCM-41 is much superior to the impregnation route in the ESR reaction. After 6 h of reaction, the catalysts remain the mesostructure and the chemical state of cerium ions unchanged. Trace coke with graphitelike structure deposited on the surface does not modify the catalytic performance.
KW - Catalyst Rh
KW - Ce-MCM-41
KW - Ethanol reforming
KW - Hydrogen
UR - http://www.scopus.com/inward/record.url?scp=84885423919&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2013.08.077
DO - 10.1016/j.ijhydene.2013.08.077
M3 - Artículo
SN - 0360-3199
VL - 38
SP - 13914
EP - 13925
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 32
ER -