Surface active structure of ultra-fine Cu/ZrO2 catalysts used for the CO2+H2 to methanol reaction

Liu, Jinyao; Shi, Jiangliu; He, Dehua; Zhang, Qijian; Wu, Xiaohui; Yu, Liang; Zhu, Qi

doi:10.1016/s0926-860x(01)00625-1

Cited by 124 publications

(75 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Raising the calcination temperature from 350 • C to 550 • C resulted in a decline of both specific surface area and pore volume, and an increase in pore diameter. These properties remained approximately the same with a calcination temperature increase to 650 • C. These observations are in agreement with others using supported Ni catalysts [27,28] and a DP-prepared zirconia-supported Cu catalyst [26]. …”

Section: Textural Propertiessupporting

confidence: 92%

“…Catalysts were prepared by either the impregnation method (IM) or the deposition precipitation method (DP) as commonly reported in the literature [26]. Impregnation was carried out in a 400 mL glass beaker by adding Ni(NO 3 ) 2 ·6H 2 O (50.54 g), Mg(NO 3 ) 2 ·6H 2 O (4.84 g), and CeO 2 (29.24 g) to DI water (250 mL), under stirring, for at least 24 h. The resulting slurry was then heated to evaporate water, until the precipitate was visibly dry [20].…”

Section: Catalyst Preparationmentioning

confidence: 99%

See 1 more Smart Citation

Co-Production of Ethanol and 1,2-Propanediol via Glycerol Hydrogenolysis Using Ni/Ce–Mg Catalysts: Effects of Catalyst Preparation and Reaction Conditions

Menchavez

Morra

2017

Catalysts

View full text Add to dashboard Cite

Abstract:Crude glycerol from biodiesel production is a biobased material capable of co-producing biofuels and chemicals. This study aimed to develop a line of Ni catalysts supported on cerium-magnesium (Ce-Mg) to improve the process efficiency of glycerol hydrogenolysis for ethanol and 1,2-propanediol (1,2-PDO). Results showed that catalytic activity was greatly improved by changing the preparation method from impregnation to deposition precipitation (DP), and by adjusting calcination temperatures. Prepared via DP, the catalysts of 25 wt % Ni supported on Ce-Mg (9:1 mol/mol) greatly improved the effectiveness in glycerol conversion while maintaining the selectivities to ethanol and 1,2-PDO. Calcination at 350 • C provided the catalysts better selectivities of 15.61% to ethanol and 67.93% to 1,2-PDO. Increases in reaction temperature and time improved the conversion of glycerol and the selectivity to ethanol, but reduced the selectivity to 1,2-PDO. A lower initial water content led to a higher conversion of glycerol, but lower selectivities to ethanol and 1,2-PDO. Higher hydrogen application affected the glycerol conversion rate positively, but the selectivities to ethanol and 1,2-PDO negatively. A comparison to the commercial Raney ® Ni catalyst showed that the Ni/Ce-Mg catalyst developed in this study showed a better potential for the selective co-production of ethanol and 1,2-PDO from glycerol hydrogenolysis.

show abstract

Section: Textural Propertiessupporting

confidence: 92%

Section: Catalyst Preparationmentioning

confidence: 99%

Co-Production of Ethanol and 1,2-Propanediol via Glycerol Hydrogenolysis Using Ni/Ce–Mg Catalysts: Effects of Catalyst Preparation and Reaction Conditions

Menchavez

Morra

2017

Catalysts

View full text Add to dashboard Cite

show abstract

“…204 However, it has also been suggested that Cu metal and low valence of Cu (Cu d+ and Cu + ) may all affect the catalytic activity of Cu-based oxide catalysts. 156,157,205,206 Resolution of the electronic and geometrical structures of the active site is the first step towards the rational design of catalyst with high activity and selectivity. 207 Two classes of reaction routes to methanol have been debated in literature.…”

Section: Theoretical Studiesmentioning

confidence: 99%

Recent advances in catalytic hydrogenation of carbon dioxide

et al. 2011

View full text Add to dashboard Cite

Owing to the increasing emissions of carbon dioxide (CO 2 ), human life and the ecological environment have been affected by global warming and climate changes. To mitigate the concentration of CO 2 in the atmosphere various strategies have been implemented such as separation, storage, and utilization of CO 2 . Although it has been explored for many years, hydrogenation reaction, an important representative among chemical conversions of CO 2 , offers challenging opportunities for sustainable development in energy and the environment. Indeed, the hydrogenation of CO 2 not only reduces the increasing CO 2 buildup but also produces fuels and chemicals. In this critical review we discuss recent developments in this area, with emphases on catalytic reactivity, reactor innovation, and reaction mechanism. We also provide an overview regarding the challenges and opportunities for future research in the field (319 references).

show abstract

“…In the latter process, first natural gas is reformed to synthesis gas, and then synthesis gas is converted into methanol or directly to DME. Synthesis of DME from synthesis gas (i.e., CO and H 2 ) is thermodynamically and economically more favorable than from methanol (Yaripour et al 2005;Brown et al 1991;Fei et al 2004;Qi et al 2001;Takeguchi et al 2000;Li et al 1996Li et al , 1997Ge et al 1998;Xia et al 2004;Ramos et al 2005;Jun et al 2003;Arena et al 2007;Liu et al 2001;Suh et al 2000;Sun et al 2003).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, other investigations showed that Cu-ZnO-ZrO 2 was an appropriate catalyst to convert methanol to DME. Furthermore, recent studies have demonstrated that zirconia has a synergetic effect on DME production Arena et al 2007;Liu et al 2001;Suh et al 2000;Sun et al 2003;Mao et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Direct production of dimethyl ether from synthesis gas utilizing bifunctional catalysts

2011

View full text Add to dashboard Cite

In this study, direct synthesis of dimethyl ether from synthesis gas was investigated. For this purpose, H-mordenite zeolite was modified by wet impregnation of aluminum oxide onto it. The prepared catalysts were characterized by AAS, XRD and NH 3 -TPD analyses. Results of catalytic tests indicated that H-mordenite modified with 8 wt% aluminum oxide was an appropriate catalyst for synthesis of dimethyl ether (DME) from methanol in which methanol conversion and DME selectivity were 99.8 and 96.8%, respectively, without a noticeable change in catalyst stability. A series of bifunctional catalysts, CuZnO-ZrO 2 /Al-modified H-mordenite, were prepared by coprecipitating sedimentation method and characterized. Synthesis of DME via direct CO hydrogenation was then evaluated in a three-phase slurry reactor. Experimental results showed that Cu-ZnO-ZrO 2 /Al-modified H-mordenite was a suitable catalyst for the production of dimethyl ether from synthesis gas. Ultimately, the effects of operating conditions such as temperature, pressure and feed flow rate on the process performance of the determined optimum bifunctional catalyst have been reported.

show abstract

Surface active structure of ultra-fine Cu/ZrO2 catalysts used for the CO2+H2 to methanol reaction

Cited by 124 publications

References 6 publications

Co-Production of Ethanol and 1,2-Propanediol via Glycerol Hydrogenolysis Using Ni/Ce–Mg Catalysts: Effects of Catalyst Preparation and Reaction Conditions

Co-Production of Ethanol and 1,2-Propanediol via Glycerol Hydrogenolysis Using Ni/Ce–Mg Catalysts: Effects of Catalyst Preparation and Reaction Conditions

Recent advances in catalytic hydrogenation of carbon dioxide

Direct production of dimethyl ether from synthesis gas utilizing bifunctional catalysts

Contact Info

Product

Resources

About