هادي خلجي

The growing deman‎d for sustainable fuels, coupled with concerns about climate change, has emphasized the need to exploit renewable resources such as biomass, an‎d the conversion of biomass to methanol not only contributes to meeting energy an‎d chemical feedstock deman‎ds but also effectively reduces carbon emissions while enhancing the environmental compatibility of energy systems. In this study, an integrated process for methanol production from biomass was presented an‎d modeled using engineering software; the proposed configuration is designed to operate without direct carbon dioxide emissions an‎d encompasses biomass gasification, chemical looping hydrogen production, the Cu–Cl cycle, an‎d a methanol synthesis unit. Reaction modeling for the gasification an‎d methanol synthesis units was validated against experimental studies, with methanol synthesis reactions carried out in a multi-tubular reactor loaded with a Cu/Zn/Al/Zr catalyst. Key operational parameters in each section were thoroughly eva‎luated: in the gasification unit, the effects of temperature an‎d equivalence ratio on syngas composition an‎d quality were assessed; in the chemical looping hydrogen production, the effects of the quantities of oxygen carrier an‎d supportive material on cycle performance an‎d hydrogen recovery efficiency were examined; an‎d in the synthesis unit, the impacts of temperature, pressure, steam content, an‎d gas hourly space velocity on reaction performance, feed conversion, an‎d methanol yield were investigated. Energy an‎d exergy analyses indicated overall system efficiencies of 53.81% an‎d 67.11%, respectively, while product separation in a distillation column with a partition wall achieved mass purities of methanol an‎d water of 99.995% an‎d 99.987%. From an economic perspective, the payback period is 9 years, with a net present value of 7502.094 k$, demonstrating the system’s technical performance an‎d economic sustainability.

توليد متانول سبز , گازي‌سازي زيست‌توده , حلقه‌ شيميايي توليد هيدروژن , چرخه مس-كلر

Green methanol production , Biomass gasification , Chemical-looping hydrogen production , Copper–chlorine (Cu–Cl) cycle

Hadi Khalaji

Ayat Gharehghani