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Citation: CHEN Wei-Miao, DING Yun-Jie, LUO Hong-Yuan, YAN Li, WANG Tao, PAN Zhen-Dong, ZHU He-Jun. Influence of Preparation Method and Conditions on Performance of Rh-Mn-Li-Ti/SiO₂ Catalyst for CO Hydrogenation to C₂-oxygenates[J]. Chinese Journal of Applied Chemistry, ;2005, 22(5): 470-474. shu

Influence of Preparation Method and Conditions on Performance of Rh-Mn-Li-Ti/SiO₂ Catalyst for CO Hydrogenation to C₂-oxygenates

1.
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023

Corresponding author: DING Yun-Jie,
Received Date: 16 July 2004
Available Online: 29 October 2004
Fund Project: 国家重点基础研究规划项目(G1999022404) (G1999022404)

The effects of the calcination temperature of precursor TiO_x/SiO₂ and the drying time for catalyst Rh-Mn-Li-Ti/SiO₂(ω(Ti)=0.005%) on its performance for the synthesis of C₂-oxygenates from syngas were investigated by means of CO hydrogenation,temperature-programmed reduction (TPR),and temperature-programmed desorption (CO-TPD).The results obtained show that the calcination temperature of the precursor TiO_x/SiO₂ has a significant effect on the catalytic activity of Rh-Mn-Li-Ti/SiO₂ in the formation of C₂-oxygenates.The catalyst calcined at 873 K yielded 395.0 g/(kg(cat)·h) C₂-oxygenates with 46.1% selectivity toward C₂-oxygenates based on carbon.When the drying time of the catalyst was prolonged properly,the yield of C₂-oxygenates reached 425.8 g/(kg(cat)·h),with little change in the C₂-oxygenates selectivity.The TPR results suggest that the calcination temperature of TiO_x/SiO₂ and the drying time of the catalyst Rh-Mn-Li-Ti/SiO₂ could regulate the interaction between the Rh species with the Mn species,and weak interactions between the Rh species and the Mn species would lead to higher catalytic performance.CO-TPD results indicate that both CO desorption peaks shifted to lower temperatures when the calcination temperature of TiO_x/SiO₂ was higher.
- rhodium-based catalyst,
- titanium,
- carbon monoxide,
- hydrogenation,
- syngas,
- C₂-oxygenate
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Influence of Preparation Method and Conditions on Performance of Rh-Mn-Li-Ti/SiO2 Catalyst for CO Hydrogenation to C2-oxygenates

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通讯作者: 陈斌, bchen63@163.com

Influence of Preparation Method and Conditions on Performance of Rh-Mn-Li-Ti/SiO₂ Catalyst for CO Hydrogenation to C₂-oxygenates