Abstract
In response to the escalating global focus on eco-friendly hydrogen (H2) production, this research introduces a groundbreaking method for purifying and liquefying bioH2, sourced biologically from renewable biomass. The innovative process employs a distinctive cryogenic technique featuring carbon dioxide solidification for H2 separation and precooling and two refrigeration cycles for liquefaction. Through meticulous simulations and optimization utilizing Aspen HYSYS V11, the proposed approach achieves a deficient specific energy consumption of 7.5 kWh/kg, surpassing traditional liquefaction methods. Notably, the system exhibits a high exergy efficiency of 41.3% and boasts a favourable total annualized cost of $36 million. This holistic and efficient strategy aims to propel the H2 value chain towards a sustainable, economically competitive, and environmentally acceptable energy source, contributing significantly to realizing a comprehensive clean energy system.
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