Steam reforming of ethanol for hydrogen production on Co/CeO2–ZrO2 catalysts prepared by polymerization method

Maia, Thaisa Aparecida; Assaf, José Mansur; Assaf, Elisabete Moreira

doi:10.1016/j.matchemphys.2011.12.058

Cited by 19 publications

(13 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among the catalysts tested, 15NiA5CoACe 0. 25 Figure 10. The results showed that the apparent activation energy of the catalyst supported on the Ce 0.25 Zr 0.75 O 2 was the lowest, hence the rate of the catalyst supported on the Ce 0.25 Zr 0.75 O 2 was the highest among all the catalysts.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Catalytic Methanation of Carbon Dioxide by Active Oxygen Material Ce_xZr_1−xO₂ Supported NiCo Bimetallic Nanocatalysts

Zhu

Razzaq

et al. 2013

AIChE Journal

View full text Add to dashboard Cite

A series of active oxygen material Ce x Zr 12x O 2 -supported NiACo bimetallic nanosized catalysts were prepared by coprecipitation method, which is simple and fit for industrial use with lower cost than other methods. The effect of CeO 2 / ZrO 2 mole ratio, Co metal addition, and PEG-6000 addition were investigated. The catalysts were characterized through X-ray diffraction, H 2 thermal-programmed reduction, N 2 adsorption, Raman spectroscopy, CO pulse chemisorption, X-ray photoelectron spectroscopy, oxygen storage capacity, and transmission electron microscopy-energy dispersive X-ray analysis. Modifications of the structural and redox properties of these materials were evaluated in relation to their catalytic performances. Particularly, the relationship between the active oxygen sites of the catalysts and their catalytic performances was investigated. The interaction between active metals (Ni and Co) and Ce x Zr 12x O 2 support was found to be very important for catalytic performance. The active oxygen site of Ce x Zr 12x O 2 can considerably improve catalytic performance. Appropriate Co metal addition also remarkably enhanced the catalytic stability and activity. Moreover, PEG-6000 addition can improve the Brunauer-Emmett-Teller surface area and active metal dispersion of catalysts to improve their performances. The nanosized catalyst 15 wt % Ni-5 wt % Co/Ce 0.25 Zr 0.75 O 2 prepared by adding 5 wt % PEG-6000 achieved almost 85% CO 2 conversion and 98% selectivity to methane at 280 C when the gas hourly space velocity was 10,000 h 21 .

show abstract

mentioning

confidence: 99%

“…Thus, the activity of 15NiA5Co/Ce 0. 25 Activities of the Catalysts Added with Different PEG-6000 Contents. The activities of the catalysts added with different amounts of PEG-6000 are shown in Figure 12.…”

mentioning

confidence: 99%

Catalytic Methanation of Carbon Dioxide by Active Oxygen Material Ce_xZr_1−xO₂ Supported NiCo Bimetallic Nanocatalysts

Zhu

Razzaq

et al. 2013

AIChE Journal

View full text Add to dashboard Cite

show abstract

“…It has been reported that bulk CeO2 shows only one strong absorption band with its maxima at 300 nm and its absorption threshold near 400 nm [43]. Two absorption bands located at 234-275 nm and 275-380 nm have also been attributed to low-coordination charge transfer transitions of Ce 3+ ←O 2and Ce 4+ ←O 2- [24,[44][45][46], respectively. The ZrO2 spectra presented two absorption bands at 232 and 267 nm that could be associated with a predominant presence of the monoclinic ZrO2 phase [24].…”

Section: − =mentioning

confidence: 99%

“…CeO2 and CexZr1-xO2 mixed oxides have been recognized as supports for noble metals on ESR and some other oxidation reactions since they possess excellent redox properties and high oxygen mobility [18][19][20]. The oxygen mobility can promote the oxidation of CO2 and CHx adsorbed species while activating water to regenerate the surface of the support and release H2 [21][22][23][24][25][26][27][28][29][30][31][32][33][34]. Studies have exhibited that the addition of ZrO2 to CeO2 could improve its redox properties and increase its oxygen storage capacity and thermal stability when used as catalyst support [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Structural and Electronic Properties of Rh/CeXZr1-XO2 Catalysts on the Low-temperature Ethanol Steam-reforming

et al. 2021

View full text Add to dashboard Cite

Abstract. Rh catalysts supported on CexZr1–xO2 (with x= 0-1) materials were synthesized by precipitation method. The influence of the two different cerium salt precursors, ammonium cerium(IV) nitrate and cerium(III) nitrate hexahydrate, over the structure and catalytic activity in steam reforming reaction was investigated. The synthesized catalysts were characterized by various techniques, such as N2 adsorption-desorption, temperature-programmed desorption, X-ray diffraction, Raman spectroscopy, diffuse reflectance UV-Vis, and X-ray photoelectron spectroscopy. The use of ammonium cerium (IV) nitrate as a cerium precursor resulted in solid CexZr1-xO2 solutions with improved oxygen mobility and specific surface area. The catalytic evaluation exhibited the support composition and structure impact on its activity and product yield. The Rh supported on Ce0.5Zr0.5O2 solid solution rendered the higher activity and H2 and CO2 yields among both series, related to improved oxygen mobility and greater Rh0 dispersion. The formation of surface defects adjacent to Rh clusters by strong metal-support interaction effect was suggested by Raman analysis. The close contact between the Rh0 site and oxygen vacancy could be favoring cyclic-like ethanol adsorption and favored the breaking of the C–C bond and further oxidation of adsorbed CO and CHX species. Resumen. Los catalizadores de Rh soportados en materiales CexZr1 – xO2 (x= 0-1) se sintetizaron mediante el método de precipitación. En este trabajo se investiga la influencia de dos precursores de sal de cerio diferentes, nitrato de amonio cerio (IV) y nitrato de cerio (III) hexahidrato, sobre la estructura y la actividad catalítica en la reacción de reformado con vapor. Los catalizadores sintetizados se caracterizaron mediante diversas técnicas, tal como fisisorción de N2, reducción a temperatura programada, difracción de rayos X, espectroscopía Raman, reflectancia difusa UV-Vis y espectroscopía de fotoelectrones de rayos X. El uso de nitrato de amonio cerio (IV) como precursor de cerio dio como resultado la obtención de soluciones sólidas de CexZr1-xO2 con una movilidad del oxígeno y área específica mejorada. La evaluación catalítica mostró el impacto de la composición y estructura del soporte sobre la conversión y rendimiento de productos. El catalizador Rh soportado en la solución sólida Ce0.5Zr0.5O2 proporcionó la mayor actividad y rendimientos de H2 y CO2 entre ambas series, relacionados con la movilidad del oxígeno mejorada y mayor dispersión de Rh0. El análisis Raman sugirió la formación de defectos superficiales adyacentes a los grupos de Rh debido a fuertes interacciones metal-soporte. El contacto estrecho entre el sitio Rh0 y la vacante de oxígeno estaría favoreciendo la adsorción del etanol en configuración cíclica y favoreciendo la ruptura del enlace C-C y la oxidación de las especies de CO y CHX adsorbidas.

show abstract

“…A weaker contact between the active metal and support was seen, which was partially reduced during reduction of the catalyst. Maia et al [59] examined the use of 10 wt% Co/Ce0.8Zr0.2O2 prepared by ethylene glycol and the citric acid polymerization method, in SRE. The activity of the catalyst was measured using S/C of 1.5 between 400 and 600 °C.…”

Section: Steam Reforming Of Ethanol (Sre)mentioning

confidence: 99%

Hydrogen production from simple alkanes and oxygenated hydrocarbons over ceria–zirconia supported catalysts: Review

Nahar

Dupont

2014

Renewable and Sustainable Energy Reviews

102

View full text Add to dashboard Cite

The use of ceria-zirconia based catalysts in hydrogen production from simple alkanes and oxygenated hydrocarbons for the processes of steam reforming (SR), autothermal reforming ('ATR'), catalytic partial oxidation ('CPO'), and dry reforming ('DR') are reviewed in this paper. Along with preparation methods, the effects of operating conditions like molar steam to carbon ratio, oxygen to carbon ratio, and temperature on the performance of hydrogen production from methane, acetic acid, ethanol, and glycerol were examined. SR and ATR of these feedstocks over ceria-zirconia supports have been widely investigated. In comparison the utilization of these supports in the CPO and DR processes has been investigated mainly for methane as compared to oxygenated hydrocarbons. Ce-rich supports were reported to be effective in hydrogen from SR and ATR of ethanol and glycerol and in SMR in the 'low' temperature range (500-600 °C), whereas zirconium-rich supports exhibited higher catalytic activity in the 'high' temperature range (700-800 °C). In the case of DR, Ce-rich supports were effective at high temperature. The methods of preparation of the supports/catalyst are shown to affect the surface area (catalyst/support), crystallite size of (active metal/support), reducibility and dispersion of the active metal, thus affecting performance of the catalyst.

show abstract

Steam reforming of ethanol for hydrogen production on Co/CeO2–ZrO2 catalysts prepared by polymerization method

Cited by 19 publications

References 29 publications

Catalytic Methanation of Carbon Dioxide by Active Oxygen Material Ce_xZr_1−xO₂ Supported NiCo Bimetallic Nanocatalysts

Catalytic Methanation of Carbon Dioxide by Active Oxygen Material Ce_xZr_1−xO₂ Supported NiCo Bimetallic Nanocatalysts

Effect of the Structural and Electronic Properties of Rh/CeXZr1-XO2 Catalysts on the Low-temperature Ethanol Steam-reforming

Hydrogen production from simple alkanes and oxygenated hydrocarbons over ceria–zirconia supported catalysts: Review

Contact Info

Product

Resources

About

Steam reforming of ethanol for hydrogen production on Co/CeO2–ZrO2 catalysts prepared by polymerization method

Cited by 19 publications

References 29 publications

Catalytic Methanation of Carbon Dioxide by Active Oxygen Material CexZr1−xO2 Supported NiCo Bimetallic Nanocatalysts

Catalytic Methanation of Carbon Dioxide by Active Oxygen Material CexZr1−xO2 Supported NiCo Bimetallic Nanocatalysts

Effect of the Structural and Electronic Properties of Rh/CeXZr1-XO2 Catalysts on the Low-temperature Ethanol Steam-reforming

Hydrogen production from simple alkanes and oxygenated hydrocarbons over ceria–zirconia supported catalysts: Review

Contact Info

Product

Resources

About

Catalytic Methanation of Carbon Dioxide by Active Oxygen Material Ce_xZr_1−xO₂ Supported NiCo Bimetallic Nanocatalysts

Catalytic Methanation of Carbon Dioxide by Active Oxygen Material Ce_xZr_1−xO₂ Supported NiCo Bimetallic Nanocatalysts