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Application of microwave synthesized Ag-Rh nanoparticles in cyclohexane dehydrogenation for enhanced H2 delivery
International Journal of Hydrogen Energy ( IF 7.2 ) Pub Date : 2018-03-17 , DOI: 10.1016/j.ijhydene.2018.02.105
Jayshri V. Pande , Ankush B. Bindwal , Yogesh B. Pakade , Rajesh B. Biniwale

The catalytic dehydrogenation of liquid organic hydrides (LOH) is a promising route to deliver H2 for various mobile and stationary applications. However, an efficient and low-cost dehydrogenation catalyst, as an alternative to Pt, is a key for the success of LOH-based H2 supply. In a quest for such catalysts, we synthesized stable Ag-Rh bimetallic nanoparticles (BNP) supported on activated carbon cloth (ACC) and Y2O3 using the microwave-assisted polyol technique. The performance of these catalysts during dehydrogenation of LOH viz., cyclohexane, was evaluated at 300 °C using an advanced spray-pulse reactor system. The Ag:Rh ratio was optimized to maximize the cyclohexane conversion and H2 evolution. The effect of Ag:Rh ratio, catalyst support, and synthesis method was investigated, too. The most stable H2 evolution performance was exhibited by microwave-synthesized 1:4 Ag-Rh/Y2O3 catalyst with the cyclohexane conversion, dehydrogenation rate and H2 evolution rate of 35.8%, 17.2 mmol/gMet/min and 400 mmol/gMet/min, respectively. Finally, the performance of catalysts used in this study was compared with the Pt-based catalysts.



中文翻译:

微波合成Ag-Rh纳米粒子在环己烷脱氢中增强H 2传递的应用

液态有机氢化物(LOH)的催化脱氢是为各种移动和固定应用输送H 2的有前途的途径。但是,作为Pt的替代品,高效且低成本的脱氢催化剂是成功实现基于LOH的H 2供给的关键。为了寻求此类催化剂,我们使用微波辅助多元醇技术合成了负载在活性炭布(ACC)和Y 2 O 3上的稳定的Ag-Rh双金属纳米粒子(BNP)。使用先进的喷雾脉冲反应器系统在300°C下评估LOH(即环己烷)脱氢过程中这些催化剂的性能。优化了Ag:Rh的比例,以最大程度地提高环己烷的转化率和H 2进化。还研究了Ag:Rh比,催化剂载体和合成方法的影响。微波合成的1:4 Ag-Rh / Y 2 O 3催化剂具有最稳定的H 2析出性能,环己烷转化率,脱氢率和H 2析出率分别为35.8%,17.2 mmol / g Met / min和400。分别为mmol / g Met / min。最后,将本研究中使用的催化剂的性能与基于Pt的催化剂进行了比较。

更新日期:2018-03-17
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