Abstract
An integrated system for hydrogen production from low rank coal and its storage is developed based on exergy recovery and process integration technologies to achieve high total energy efficiency. The integrated system consists of drying, gasification, chemical looping, and hydrogenation. In term of energy analysis, exergy recovery technology basically recirculates the energy/heat involved in a single process minimizing the exergy destruction in the process. Unfortunately, not all of the energy/heat involved in a single process can be recirculated thoroughly. Hence, a combination with process integration is performed to enhance the minimization of exergy destruction in the overall integrated system. In this study, the energy efficiency is evaluated. The proposed integrated system shows a very high energy efficiency during conversion of low rank coal to hydrogen which is ready for transportation.
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