LOW-EMISSIONS HYDROGEN FROM MCH DEHYDROGENATION: INTEGRATION WITH LNG REGASIFICATION

Recovering hydrogen from Methylcyclohexane (MCH) is an energy intensive process. An innovative idea of integrating this process with LNG regasification is proposed in this study and demonstrated via modelling and simulation to reduce energy use. LNG provides a cold source for high recovery cryogenic flash separation, and generates power in an organic Rankine cycle to reduce/eliminate external electricity demand for hydrogen compression to the high (end use) pressure. A rigorous simulation-based optimization was performed to minimize external energy inputs. A case study with 100 tph MCH and 100 tph LNG showed that integrating regasification with dehydrogenation produced 6.2 tph of hydrogen (from 100 tph MCH) with a net power generation of 310 kW and a hydrogen recovery cost of 0.282 $/kg H2. Overall, the superstructure proposed in this manuscript provides a generic initial approach for future MCH hydrogen supply chain projects, when considering integrations with LNG regasification plants.

Author dc:creator

• TSANG FAN LOK

• Organic Rankine cycle
• Heat Integration
• LNG
• Methylcyclohexane
• Hydrogen

Licence

• https://scholarbank.nus.edu.sg/bitstreams/5748e949-540f-4b8f-bcb2-4a20da109b74/download