Browsing by Author "LHR TP 9669"

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    Technoeconomic and environmental assessment of green methanol concept based on biogas upgradation and alkaline water electrolysis
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2025) Sahibzada Mansoor Ul Hassan; CUI/SP22-RCH-003/LHR; Dr. Arif Hussain; LHR TP 9669
    To adopt the change of using sustainable fuel, it is very important to reduce the use of fossil fuels. The research presented is based upon the production of methanol by green pathway, which includes the biogas upgradation coupled with alkaline electrolyser, and the technoeconomic and life cycle assessment analysis discussion. The CO2 is obtained from biogas upgradation and H2 is produced from alkaline electrolyser which is powered with wind green electricity source to achieve the synthesis of methanol with the help of catalytic hydrogenation. The concept is simulated using ASPEN PLUS-V14, which was latest version, and it gave the best results to check the feasibility of the process, which includes: The mass energy balance to see the flow of mass and energy throughout the process. Technoeconomic analysis (TEA), to calculate overall cost of the process, cost of each equipment, electricity cost of all process equipment and electrolyser which was the major consumer of the process electricity use, after the compressors, used in biogas upgradation. It was also found that the electrolyzer has the highest equipment and installation cost which impacted the MFSP of methanol. At the last of technoeconomic analysis, the minimum fuel selling price (MFSP) was calculated to match the feasibility of the process with the existing research. The MFSP analysis was concluded as: the MFSP of current study was at the lower bound of the price range of the methanol from biogas by electrolysis back by literature values. At last life cycle assessment (LCA) of the process was evaluated to have an estimation of the carbon footprint of the process over the 100- and 20-year time horizon. The LCA was conducted by changing different scenarios of process. These scenarios were mainly under the umbrella of global warming potential 100 (GWP-100) and global warming potential 20 (GWP-20). The findings revealed that, when powered by low-carbon or renewable electricity sources, the green methanol route significantly reduces greenhouse gas emissions compared to fossil-derived methanol. In some configurations, the process even achieved net-negative CO₂ emissions. These outcomes suggest that utilizing biogenic CO₂ and green hydrogen for methanol synthesis can offer a promising low-carbon fuel alternative particularly in future energy systems that rely heavily on renewable electricity and are governed by carbon pricing mechanisms. Overall, this study contributes meaningful data and recommendations to guide policymakers, industrial stakeholders, and investors toward the development of Power-to-X technologies and the broader transition to carbon-neutral circular economies