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SO3 decomposition over β–SiC and SiO2 supported CuFe2O4: A stability and kinetic study
International Journal of Hydrogen Energy ( IF 7.2 ) Pub Date : 2020-06-30 , DOI: 10.1016/j.ijhydene.2020.05.177
Sachin Tomar , Satyam Gangwar , Kishore Kondamudi , Sreedevi Upadhyayula

CuFe2O4/β–SiC and CuFe2O4/SiO2 catalysts were prepared by wet impregnation method, following the high temperature solid state route and their catalytic performance is evaluated in the SO3 decomposition reaction of the Sulfur–Iodine (S–I) cycle for hydrogen production. The synthesized catalysts are characterized by XRD, FT–IR, TGA, XPS, N2–BET, TEM, HR–TEM, FESEM–EDS and elemental mapping. CuFe2O4/β–SiC catalyst shows higher activity and stability while sintering is observed in the spent CuFe2O4/SiO2 whose activity decreased during the reaction time on stream. Kinetic studies were performed over CuFe2O4/β-SiC in the temperature range of 800–900 °C using wide range of space time, 6.54–44.40 kg h kmol−1. A heterogeneous kinetic model was developed based on the product distribution and the reaction rates determined by the model fitted well with the experimental rates at different temperatures.



中文翻译:

β-SiC和SiO 2负载的CuFe 2 O 4上的SO 3分解:稳定性和动力学研究

采用高温浸渍法,采用湿法浸渍法制备了CuFe 2 O 4 /β-SiC和CuFe 2 O 4 / SiO 2催化剂,并在硫碘的SO 3分解反应中评价了其催化性能。–I)制氢循环。合成的催化剂通过XRD,FT-IR,TGA,XPS,N 2 -BET,TEM,HR-TEM,FESEM-EDS和元素图谱进行表征。CuFe 2 O 4 /β-SiC催化剂显示较高的活性和稳定性,而在废CuFe 2 O 4 / SiO 2中观察到烧结在反应过程中,其活性下降。在800–900°C的温度范围内,使用CuFe 2 O 4 /β-SiC在6.54–44.40 kg h kmol -1的宽时空范围内进行了动力学研究。基于产物分布和由该模型确定的反应速率与在不同温度下的实验速率很好地拟合,建立了异质动力学模型。

更新日期:2020-08-06
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