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Experimental performance investigation of a 2 kW methanation reactor
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2018-03-14 00:00:00 , DOI: 10.1039/c8se00073e Noris Gallandat 1, 2, 3, 4, 5 , Robin Mutschler 1, 2, 3, 4, 5 , Vincent Vernay 1, 2, 3, 4, 5 , Heena Yang 1, 2, 3, 4, 5 , Andreas Züttel 1, 2, 3, 4, 5
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2018-03-14 00:00:00 , DOI: 10.1039/c8se00073e Noris Gallandat 1, 2, 3, 4, 5 , Robin Mutschler 1, 2, 3, 4, 5 , Vincent Vernay 1, 2, 3, 4, 5 , Heena Yang 1, 2, 3, 4, 5 , Andreas Züttel 1, 2, 3, 4, 5
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A 2 kW methanation reactor was designed, built and tested for the gas phase hydrogenation of CO2 to CH4. The reactor is a single-stage, fixed-bed reactor. A commercial catalyst with 0.5% wt Ru on an alumina support was applied and characterized using TEM imaging. A thermal model of the process was developed in order to effectively design the cooling system and estimate the temperature gradients within the reactor. The conversion efficiency was investigated experimentally using transmission infrared spectroscopy. The reactor temperature set point was varied from 140 °C to 400 °C, the space velocity ranged from 0.14 s−1 to 0.55 s−1 (corresponding to 0.40–1.55 ml g−1 s−1) and the pressure was set to 5 bar. A maximal conversion of 99% was measured at a temperature of 260 °C and a space velocity of 0.14 s−1. A CO2 conversion of 97% was reached at a target flow rate of 50 g h−1 H2 and a temperature set point of 280 °C. Such conversions are very high for a single-stage reactor and are partly due to the inhomogeneous temperature distribution within the catalyst bed, which allowed the balancing of the kinetic and thermodynamic effects. The reactor presented in this paper is installed as a part of the small-scale demonstrator of renewable energy to synthetic hydrocarbon conversion of EPFL Valais/Wallis.
中文翻译：
2 kW甲烷化反应器的实验性能研究
设计，构建并测试了2 kW的甲烷化反应器，用于将CO 2气相氢化为CH 4。该反应器是单级固定床反应器。使用在氧化铝载体上具有0.5wt％Ru的市售催化剂，并使用TEM成像表征。为了有效地设计冷却系统并估计反应器内的温度梯度，开发了该过程的热模型。使用透射红外光谱对转化效率进行了实验研究。反应器温度设定点在140°C至400°C之间变化，空速范围为0.14 s -1至0.55 s -1（相当于0.40-1.55 ml g -1 s -1），压力设为5 bar。在260°C的温度和0.14 s -1的空速下测得的最大转化率为99％。在50 gh -1 H 2的目标流量和280°C的温度设定点下，CO 2转化率达到97％。对于单级反应器，这种转化率非常高，并且部分是由于催化剂床内的温度分布不均匀，这使得动力学和热力学效果达到了平衡。本文介绍的反应堆是作为EPFL Valais / Wallis的可再生能源向合成烃转化的小规模示范装置的一部分而安装的。
更新日期：2018-03-14
中文翻译：
2 kW甲烷化反应器的实验性能研究
设计，构建并测试了2 kW的甲烷化反应器，用于将CO 2气相氢化为CH 4。该反应器是单级固定床反应器。使用在氧化铝载体上具有0.5wt％Ru的市售催化剂，并使用TEM成像表征。为了有效地设计冷却系统并估计反应器内的温度梯度，开发了该过程的热模型。使用透射红外光谱对转化效率进行了实验研究。反应器温度设定点在140°C至400°C之间变化，空速范围为0.14 s -1至0.55 s -1（相当于0.40-1.55 ml g -1 s -1），压力设为5 bar。在260°C的温度和0.14 s -1的空速下测得的最大转化率为99％。在50 gh -1 H 2的目标流量和280°C的温度设定点下，CO 2转化率达到97％。对于单级反应器，这种转化率非常高，并且部分是由于催化剂床内的温度分布不均匀，这使得动力学和热力学效果达到了平衡。本文介绍的反应堆是作为EPFL Valais / Wallis的可再生能源向合成烃转化的小规模示范装置的一部分而安装的。
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