Demonstrating direct methanation of real biogas in a fluidised bed reactor
Demonstrating direct methanation of real biogas in a fluidised bed reactor
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DOI：
10.1016/j.apenergy.2019.01.230
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发表时间：
2019-04-15
期刊：
影响因子：
11.2
通讯作者：
Schildhauer, Tilman J.
中科院分区：
文献类型：
--
作者：
Witte, Julia;Calbry-Muzyka, Adelaide;Schildhauer, Tilman J.
利用苏黎世某沼气厂的真实沼气，在中试装置中进行了沼气催化直接甲烷化生产生物甲烷的试验研究。包括鼓泡流化床在内的甲烷化系统可以稳定运行超过1100小时，随后注入天然气网。平均甲烷产率达96%。在长时间的实验中，监测到缓慢的失活过程，发现只是适度的。有机硫化合物可以确定为失活的主要来源。然而，焦化失活也不能完全排除。在气体净化装置中采取适当措施，使随后不测量含硫化合物（检测限：相关成分< 0.05 ppm），产率降低接近于零。此外，将实验结果与其他地方提出的基于速率的模型的模拟结果进行了比较。模型预测结果与实验结果一致。在基于速率的模型中使用的动力学允许根据实验结果正确预测最佳反应温度。
The catalytic direct methanation of biogas to produce biomethane was conducted in a pilot plant with real biogas from a biogas plant in Zurich. Stable operation of the methanation system including a bubbling fluidised bed could be demonstrated for over 1100 h of regular operation with subsequent injection into the gas grid. An average methane yield of 96% was reached. During the long-duration experiment, the slow deactivation process was monitored and found to be only moderate. Organic sulphur compounds could be identified as the main source of deactivation. However, deactivation from coking could not be fully excluded. With appropriate measures in the gas cleaning unit, so that no sulphur compounds were measured subsequently (limit of detection: < 0.05 ppm of relevant components), the yield reduction went close to zero. Additionally, experimental results were compared to simulation results from a rate-based model presented elsewhere. Model predictions and experimental results are in accordance. The kinetics used in the rate-based model allowed a correct prediction of the optimum reaction temperature found by experimental results.