Modeling and Simulation of a Natural Gas and Alternative Fuels Combined Cycle Power Plant with Amine-Based CO2 capture in Peru

Castilla A.; Aldasabal A.; Tarazona-Vásquez F.; Ramos W. · Proceedings of the LACCEI international Multi-conference for Engineering, Education and Technology (2025) · DOI: 10.18687/laccei2025.1.1.2316

Resumen

This study evaluates alternative scenarios for reducing carbon dioxide emissions from the Ventanilla thermoelectric power plant in Lima, Peru, using the process simulation software ProMax 6.0. The scenarios involve blending hydrogen (0% and 15%) with natural gas (NG) as fuel and implementing CO2 capture systems using monoethanolamine (MEA), 2-amino-2-methyl-1-propanol (AMP), and amine blends such as MEA/piperazine (PZ), MEA/methyldiethanolamine (MDEA), and MDEA/PZ. The study aimed to achieve CO2 capture with a purity equal or higher than 99.8% to evaluate its commercialization potential. Additionally, an economic analysis was conducted to assess the profitability of the process, considering carbon taxes from Argentina ($3.33 per ton CO2), Chile ($5 per ton CO2), and Peru ($5, $10, or $20 per ton CO2 depending on the total emissions). A sensitivity analysis was also performed, taking into account the maximum and minimum dollar exchange rates observed in Peru over the past five years (4.134 soles and 3.434 soles respectively). And, hydrogen costs were evaluated based on their production pathways, with prices considered for green ($1.3 per kg H2), blue ($2.49 per kg H2), and gray ($1.1 per kg H2). Among the alternative studied scenarios, the MDEA (40%) and PZ (10%) blend with 100% NG as fuel exhibited the best net profit margin of 43.91%, achieving 426.49 MW of net power generation and CO2 emissions of 101.28 kgCO2/GJ. Moreover, vent gas with 99.8% CO2 purity was obtained.

Instituciones: Universidad de Ingeniería y Tecnología