Research progress on catalytic dehydrogenation of dodecahydro-N-ethylcarbazole as liquid organic hydrogen carrier
In the context of carbon peak and carbon neutrality,the transformation of energy structure is imperative.The new energy system is mainly based on non-fossil energy and hydrogen energy is an essential energy carrier.At present,hydrogen storage and transportation are the main challenges for its application.Liquid organic hydrogen carrier is a promising alternative for safe and efficient hydrogen storage method.N-ethylcarbazole/dodecahydro-N-ethylcarbazole(NEC/12H-NEC)is a good choice for hydrogen carrier.The high dehydrogenation temperature of 12H-NEC and poor stability of catalysts are the main challenges limiting the large-scale application.Therefore,this paper introduced the dehydrogenation reaction mechanism of 12H-NEC and described its reaction pathway,kinetics and catalytic reaction process.And then,the activity,stability and deactivation mechanism of dehydrogenation catalysts were concluded.The challenges of reactor design were discussed based on the characteristics of the dehydrogenation reaction and typical dehydrogenation reactors were described.Finally,in view of the potential challenges of 12H-NEC dehydrogenation reaction,a prospect for the future application of this technology in the field of hydrogen storage is put forward.
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