Sorption enhanced dimethyl ether synthesis under industrially relevant conditions: experimental validation of pressure swing regeneration,Reaction Chemistry & Engineering

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Sorption enhanced dimethyl ether synthesis under industrially relevant conditions: experimental validation of pressure swing regeneration
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2020-12-8 , DOI: 10.1039/d0re00431f
Jasper van Kampen _{1,

2,

3,

4,

5} , Jurriaan Boon _{1,

2,

3,

4,

5} , Jaap Vente _{1,

2,

3,

4} , Martin van Sint Annaland _{4,

5,

6,

7}

Affiliation

Dimethyl ether (DME) is one of the most attractive alternative fuel solutions under consideration worldwide. However, its production from CO₂-rich feedstock or CO₂ directly is limited via conventional processes and therefore considered unattractive. For CO₂ utilisation, the production and efficient handling of steam remains a major bottleneck. Sorption enhanced DME synthesis (SEDMES), which combines heterogeneous catalysis with in situ water adsorption, is a promising process intensification strategy for the direct production of DME from CO₂. In this work, SEDMES is demonstrated experimentally on a bench-scale reactor with pressure swing regeneration under industrially relevant conditions. Pressure swing regeneration, rather than the time and energy intensive temperature swing regeneration, shows high performance with over 80% single-pass carbon selectivity to DME. This already allows for a factor four increase in productivity, with further optimisation still possible. With the proposed Sips working isotherm for the water adsorbent, and the methanol synthesis and dehydration kinetics, the validated dynamic cycle model adequately describes the SEDMES bench-scale data. Applying shorter cycle times, made possible by pressure swing regeneration, allows optimisation of the DME productivity while maintaining the high single-pass yield typical for SEDMES. The experimental confirmation shown in this paper unlocks the full potential of the high efficiency carbon and hydrogen utilisation by SEDMES technology.

中文翻译：

在工业相关条件下吸附增强的二甲醚合成：变压再生的实验验证

二甲醚（DME）是世界范围内正在考虑的最有吸引力的替代燃料解决方案之一。然而，它的生产从CO ₂富集的原料或CO ₂直接被限制通过常规方法，并因此被认为不具吸引力。对于CO ₂利用，蒸汽的生产和有效处理仍然是主要瓶颈。吸附增强的DME合成（SEDMES），将非均相催化与原位水吸附相结合，是从CO ₂直接生产DME的有前途的工艺强化策略。在这项工作中，SEDMES在具有工业相关条件的变压再生的台式反应器上进行了实验验证。变压再生，而不是时间和精力密集的变温再生，显示了高性能，对DME的单程碳选择性超过80％。这已经使生产率提高了四倍，并且仍然可以进行进一步优化。利用拟议的Sips水吸附剂等温线以及甲醇合成和脱水动力学，经过验证的动态循环模型可以充分描述SEDMES基准规模数据。通过变压再生可以缩短周期时间，从而可以优化DME生产率，同时保持SEDMES典型的高单次通过率。

更新日期：2020-12-16

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