Thermal performance and surface analysis of steel-supported platinum nanoparticles designed for bio-oil catalytic upconversion during radio frequency-based inductive heating
Thermal performance and surface analysis of steel-supported platinum nanoparticles designed for bio-oil catalytic upconversion during radio frequency-based inductive heating
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DOI：
10.1016/j.enconman.2019.01.025
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发表时间：
2019-03-01
影响因子：
10.4
通讯作者：
Hayes, Daniel J.
中科院分区：
文献类型：
--
作者：
Bursavich, Jacob;Abu-Laban, Mohammad;Hayes, Daniel J.
设计了一种用于基于射频感应的生物燃料上转换的催化剂。通过使用硅烷连接物，用铂纳米颗粒对不锈钢球进行功能化。用X射线衍射仪、傅里叶变换红外光谱、扫描电子能谱和X射线光电子能谱对这些球体进行了表征，然后在射频感应加热器中产生了加热曲线。钢球的高导电性导致快速加热，在整个表面产生正的温度梯度，在20 S以下的温度下钢球的温度达到300摄氏度。使用最小3%的功率(150W)，在单个钢球实验中，温度超过525摄氏度在150 S以内。通过钢床实验模拟了生物质热解蒸汽的感应催化上转化过程，结果表明，在功率为5%(250W)的情况下，在300℃的S时间内，生物质热解蒸汽的上转化温度可达195℃以上。在525摄氏度或更高的温度下重复加热，铂纳米颗粒的熔化和降解是明显的，幸运的是，为热解油上转化而设计的典型催化剂的工作温度远低于这些温度。这种加热形式有可能减轻催化剂表面积炭的影响，这是裂解油上转化和各种石化过程中的一个紧迫问题。
A catalyst is designed for use in radio frequency (RF) induction-based biofuel upconversion. Stainless steel spheres are functionalized with Pt-nanoparticles through the use of a silane linker. These spheres are characterized via XRD, FTIR, SEM/EDX and XPS followed by generation of heating profiles in an RF induction heater. The high electric conductivity of the steel balls results in rapid heating which creates a positive temperature gradient across the surface with temperatures of the steel balls reaching 300 degrees C in under 20 s. Using a minimum of 3% power (150 W), temperatures over 525 degrees C are achieved within 150 s in a single steel ball experiment. A steel bed experiment is performed to simulate an induction-based catalytic upconversion of biomass pyrolysis vapors which indicates that temperatures over 195 degrees C are achieved in as little as 300 s using 5% power (250 W). Melting and degradation of the Pt nanoparticles is evident with repeated heating at temperatures of 525 degrees C and above, fortunately, typical catalysts designed for upconversion of pyrolysis oils are operating well below these temperatures. This form of heating has a potential to mitigate the effects of coke deposition on catalyst surface, which is a pressing issue during up-conversion of pyrolysis oil and various petrochemical processes.