Intermetallic Compounds as Highly Selective Catalysts in Microstructured Reactors

在该项目中，将研究将高选择性半加氢催化剂GaPd，GaPd 2以及Al 13 Fe 4整合到微结构反应器中的创新途径，以产生新的加氢技术。微结构反应器中的出色热传输允许在广泛的工艺参数范围内对材料进行精确的催化测试。这导致了关于金属间化合物氢化动力学的重要见解，特别是关于与常规合金基系统的差异。在技术实施中，可以实现更高的温度，从而能够使用过程热来产生蒸汽。由此，可以改善过程能量平衡。将开发三种不同的方法来合成或填充反应器中的金属间化合物：i）将未负载的Ga-Pd纳米颗粒填充在用作参考系统的错流微反应器中; ii）将Ga-Pd纳米颗粒喷墨印刷在微通道中;以及iii）将金属间Ga-Pd化合物以及不含贵金属的金属间化合物Al 13 Fe 4直接固化合成到微通道中。后者代表了一种替代和经济的途径，以薄涂层与高比表面积的化合物。该项目的工作包括合成的镓钯纳米粒子，其表征以及开发的油墨印刷的微结构箔。此外，印刷或溅射涂层将表征其相组成，粘附力和形态。在乙炔半氢化反应器系统的综合催化测试中，在大范围的参数-超出了既定的技术-允许确定动力学值。这些构成了动力学模型和理论评估新加氢技术的基础。此外，应测试制备的催化涂层对其他不饱和烃（如丙炔或1，4-丁二烯）的氢化作用，以得出一般结论。

Within the project innovative pathways to integrate the highly selective semi-hydrogenation catalysts GaPd, GaPd2 as well as Al13Fe4 into microstructured reactors will be investigated, to result in a new hydrogenation technology. The excellent heat transport in microstructured reactors allows exact catalytic testing of the materials in a wide range of process parameters. This results in important insights about the kinetics of the hydrogenation on intermetallic compounds, especially concerning the differences to conventional alloy-based systems. In the technical implementation higher temperatures could then be realized, enabling the use of the process heat to generate steam. By this, the process energy balance can be improved. Three different methods to synthesize or fill the intermetallic compounds in the reactors will be developed: i) unsupported Ga-Pd nanoparticles will be filled in a cross-flow microreactor which is used as reference system; ii) inkjet-printing of Ga-Pd nanoparticles in microchannels and iii) sputter-synthesis of the intermetallic Ga-Pd compounds as well as the noble metal-free intermetallic compound Al13Fe4 directly into the microchannels. The latter represents an alternative and economic pathway to thin coatings with high specific surface areas of the compounds.Work within the project comprises the synthesis of the Ga-Pd nanoparticles, their characterisation as well as the development of the ink for printing the microstructured foils. In addition, the printed or sputtered coatings will be characterised concerning their phase composition, adhesion and morphology. Comprehensive catalytic tests of the reactor systems in the semihydrogenation of ethyne in a large range of parameters - beyond the established technology - allow determination of kinetic values. These form the basis to model the kinetics and to theoretically evaluate the new hydrogenation technology. Furthermore, the prepared catalytic coatings shall be tested for the hydrogenation of other unsaturated hydrocarbons like propyne or 1,4-butadiene to enable general conclusions.