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首页> 外文期刊>Journal of natural gas science and engineering >Sono-dispersion of bimetallic Ni-Co over zeolite Y used in conversion of greenhouse gases CH4/CO2 to high valued syngas
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Sono-dispersion of bimetallic Ni-Co over zeolite Y used in conversion of greenhouse gases CH4/CO2 to high valued syngas

机译：Ni-Co双金属镍在沸石Y上的声分散，用于将温室气体CH4 / CO2转化为高价值合成气

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Bio Gas Reforming (BGR) process is an interesting route for the removal of greenhouses gases. The presented research deals with nanocatalyst development by sonochemical method for bio gas reforming. The main aim of this study is achieving the optimized composition of Ni-Co bimetallic catalyst over zeolite Y. The zeolite Y and Ni-Co/Y nanocatalysts were characterized by XRD, FESEM, EDX, BET and FTIR techniques. The XRD patterns displayed the formation of appropriate phases. EDX analysis revealed the presence of all elements and uniform dispersion of active metal phase. Also, the FESEM images showed that Ni7Co3Y catalyst had smaller particles size and more limited distribution than Ni3Co7Y catalyst. Based on BET analysis results, when the composition of nickel and cobalt changed, catalysts had different surface area. Actually, changing in Co and Ni composition had the reverse effect on specific surface area. Moreover, the formations of desired functional groups were proved by FTIR characterization. The reforming reactions were carried out at GHSV = 24 l/g h, P = 1 atm, CH4/CO2 = 1 and at the temperature range of 550-850 degrees C. The activity tests displayed that Ni7Co3/Y activity was higher than zeolite Y and Ni3Co7/Y catalyst at all temperatures and the activity Ni7Co3/Y catalyst remained stable during 10 h. Furthermore, the proposed reaction mechanism showed that there are six major reaction channels for NiCo/Y catalyst in biogas reforming process. (C) 2015 Elsevier B.V. All rights reserved.
机译：生物气体重整（BGR）工艺是去除温室气体的一种有趣途径。提出的研究涉及通过声化学方法用于生物气重整的纳米催化剂的开发。这项研究的主要目的是实现在沸石Y上优化Ni-Co双金属催化剂的组成。通过XRD，FESEM，EDX，BET和FTIR技术对沸石Y和Ni-Co / Y纳米催化剂进行了表征。 XRD图谱显示适当相的形成。 EDX分析显示所有元素的存在和活性金属相的均匀分散。而且，FESEM图像显示，与Ni3Co7Y催化剂相比，Ni7Co3Y催化剂具有更小的粒径和更有限的分布。基于BET分析结果，当镍和钴的组成改变时，催化剂具有不同的表面积。实际上，Co和Ni组成的变化对比表面积具有相反的影响。此外，通过FTIR表征证明了所需官能团的形成。重整反应在GHSV = 24 l / gh，P = 1 atm，CH4 / CO2 = 1且温度范围为550-850℃下进行。活性测试表明，Ni7Co3 / Y活性高于沸石Y Ni7Co3 / Y催化剂在所有温度下均保持稳定，且活性在10 h内保持稳定。此外，所提出的反应机理表明在沼气重整过程中，NiCo / Y催化剂有六个主要反应通道。 （C）2015 Elsevier B.V.保留所有权利。

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