A comparative analysis and multi-objective optimization of replacing syngas from a downdraft gasifier in an ordinary 300 MW power plant to lessen the environmental effect

• Published in: Chemosphere (Oxford) Vol. 335; p. 138874
• Main Authors: Danayimehr, Mohammad, Motallebzadeh, Roghayyeh, Ranjbar, Seyyed Faramarz, Meysami, Mohammad Ali
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.09.2023
• Subjects: Biomass; Climate; Garbage; Gases - analysis; Gasification; Multi-criteria optimization; Sustainability; Temperature; Thermodynamic equilibrium; Waste-2-energy conversion; Multi-criteria optimization; Gasification; Sustainability; Thermodynamic equilibrium; Waste-2-energy conversion
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2023.138874

Due to environmental issues, disposing of household garbage is a significant obstacle for life on Earth. Due to this, several sorts of research on biomass conversion into useable fuel technologies are carried out. Among the most popular and effective technologies is the gasification process, which transforms trash into a synthetic gas that can be used in industry. Several mathematical models have been put out to mimic gasification; however, they often fall short of accurately investigating and fixing flaws in the model's waste gasification. The current study used EES software to estimate the equilibrium of Tabriz City's waste gasification using corrective coefficients. The output of this model demonstrates that raising the temperature of the gasifier outlet, waste moisture, and equivalence ratio decreases the calorific value of the synthesis gas generated. Moreover, when using the current model at 800 °C, the synthesis gas has a calorific value of 1.9 MJm3. By comparing these findings to those of previous studies, it was shown that the biomass's chemical composition and moisture content, numerical or experimental methods, gasification temperature, and preheating of the gas input air all had a major influence on process outcomes. The Cp of the system and the ηII are equivalent to 28.31 $/GJ and 17.98%, respectively, according to the integration and multi-objective findings. [Display omitted] •The feasibility of eliminating fossil fuel and replacing it with renewable energy to reach sustainability is conducted.•The effect of critical design variables on techno-economic and environmental aspects is studied.•MOO results indicated that the values of the unit product cost of the system and the exergy efficiency are equal to 28.31 $/GJ and 17.98%, respectively.