The influence of La doping on the catalytic behavior of Cu/ZrO2 for methanol synthesis from CO2 hydrogenation

Guo, Xiaoming; Mao, Dongsen; Lu, Guanzhong; Wang, Song; Wu, Guisheng

doi:10.1016/j.molcata.2011.05.019

Cited by 259 publications

(129 citation statements)

References 56 publications

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“…Only a few peaks can be seen above the baseline. Two well-defined peaks visible at 2θ = 35.5• and 38.9• were ascribed to a typical structure of the tenorite, a monoclinic structure of CuO with the active crystal planes of (1 1 1) and (2 0 0) (Guo et al 2011;Pung et al 2014). Thus, it can be deduced that the copper species in the precursors calcined at 623 K have been converted to CuO.…”

Section: Resultsmentioning

confidence: 98%

Catalytic Performance of Cu/ZnO/A12O3/ZrO2 for Slurry Methanol Synthesis from CO2 Hydrogenation: Effect of Cu/Zn Molar Ratio

Shaharun¹,

Shaharun²,

Shah³

et al. 2018

JSM

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Section: Resultsmentioning

confidence: 98%

Catalytic Performance of Cu/ZnO/A12O3/ZrO2 for Slurry Methanol Synthesis from CO2 Hydrogenation: Effect of Cu/Zn Molar Ratio

Shaharun¹,

Shaharun²,

Shah³

et al. 2018

JSM

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“…The close combination of calcium oxide in copper based catalysts can cause the formation of methanol, but directly mixing calcium oxide at 10% wt to copper-based catalyst, Cu/ZrO2, gave a superior formation of methanol as shown in Fig. 4(a), strongly emphasizing the activity of La modified copper-based catalysts [15] and a dual site L-H mechanism proposed by Arena F. et al [13], involving hydrogenation and basic oxide sites at the surfaces of metal and oxide phase. …”

Section: Effect Of Calcium Oxide On Co2 Hydrogenationmentioning

confidence: 93%

“…The primary role of metal/oxide interface in copper-based catalysts on CO2 to CH3OH hydrogenation arises from a synergism of metal Cu hydrogenation and oxide basic sites [14]. The hydrogenation of CO2 to methanol was preferable apparently owning to La addition in ZrO2 supported copper based catalysts [15]. Additional La existing in Cu/ZrO2 can improve the number of strong base which facilitates adsorption of CO2 contributing the formation of methanol.…”

Section: Introductionmentioning

confidence: 99%

The Combination of Calcium Oxide and Cu/ZrO2 Catalyst and their Selective Products for CO2 Hydrogenation

Soisuwan¹,

Wisaijorn²,

Nimnul³

et al. 2016

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Abstract. The catalytic activities of Cu/ZrO2_CaO catalysts were investigated on CO2 hydrogenation. The CO2 hydrogenations were carried out over combination of calcium oxide and Cu/ZrO2 catalyst. Two calcination temperatures were chosen at 300 and 650 o C according to thermal decomposition results. The catalysts were characterized by means of N2 adsorption-desorption, H2 temperature programmed reduction and X-ray diffraction. The CO2 hydrogenation under atmospheric pressure and at 250 o C was carried out over copper-based catalysts combined with calcium oxide namely i.e. Cu/ZrO 2 _CaO300, Cu/ZrO 2 _CaO650, Cu/ZrO2_Cu/CaO and Cu/ZrO2+CaO. The catalytic activities over all catalysts were consistent for 4 hours. The catalytic reaction rates over copper-based catalysts were in the range of 21.8 -47.4 mol L -1 s -1 g cat -1 . The modification of calcium oxide can improve the catalytic activity of copper-based catalysts to 47.4 mol L -1 s -1 g cat -1 . The calcination temperature can cause a difference in active species that impact on product selectivity. The CaO consisting in copper-based catalysts, i.e. Cu/ZrO 2 _CaO650, facilitate the growth of long chain hydrocarbon, whereas Cu/ZrO 2 _CaO300 favors the formation of carbon monoxide plausibly arising from reverse water gas shift reaction. Directly combined calcium oxide with Cu/ZrO 2 via physically mixing, i.e. Cu/ZrO2+CaO, can impr ove the r ate of methanol production.

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“…For 2 wt% CuO modified activated carbon, the Cu 2p 3/2 was composed of two components at 933.7 and 942.0 eV, which indicated that the chemical state of copper is Cu 2? (Sinapi et al 2002;Guo et al 2011). The V 2p3/2 peak occurred at 517.5 eV, which was assigned to V 5?…”

Section: Metal Phasesmentioning

confidence: 99%

Physicochemical properties and desulfurization activities of metal oxide/biomass-based activated carbons prepared by blending method

Fan

Jiang

et al. 2014

Adsorption

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Column activated carbons were prepared from walnut shell chars and transition metal oxide powders (i.e. Co 2 O 3 , Ni 2 O 3 , CuO and V 2 O 5 ) with blending method. Samples were characterized by N 2 adsorption-desorption, X-ray diffraction, X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy. The texture properties of all modified activated carbons with metal oxides dosage of \5 wt% did not change evidently. The basic functionalities of these activated carbons increased relative to blank carbon. Moreover, metal species with different oxidation states coexisted on the modified activated carbons. The optimal dosage of all metal oxides was 2 wt%. The sulfur capacities of these modified activated carbons were 7.7-46.0 % higher than that of blank activated carbon and the highest occurred for V 2 O 5 modified activated carbon. The improved desulfurization performance was mainly attributed to the higher catalytic activity of the active metal oxides formed in the presence of O 2 during the desulfurization process.

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The influence of La doping on the catalytic behavior of Cu/ZrO2 for methanol synthesis from CO2 hydrogenation

Cited by 259 publications

References 56 publications

Catalytic Performance of Cu/ZnO/A12O3/ZrO2 for Slurry Methanol Synthesis from CO2 Hydrogenation: Effect of Cu/Zn Molar Ratio

Catalytic Performance of Cu/ZnO/A12O3/ZrO2 for Slurry Methanol Synthesis from CO2 Hydrogenation: Effect of Cu/Zn Molar Ratio

The Combination of Calcium Oxide and Cu/ZrO2 Catalyst and their Selective Products for CO2 Hydrogenation

Physicochemical properties and desulfurization activities of metal oxide/biomass-based activated carbons prepared by blending method

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