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Licensed Unlicensed Requires Authentication Published by De Gruyter July 17, 2020

Mixed-integer non-linear programming (MINLP) multi-period multi-objective optimization of advanced power plant through gasification of municipal solid waste (MSW)

Ahmad Syauqi and Widodo Wahyu Purwanto

Abstract

Multi-objective optimization is one of the most effective tools for the decision support system. This study aims to optimize the gasification of municipal solid waste (MSW) for advanced power plant. MSW gasifier is simulated using Aspen Plus v11 to produce syngas, to be fed into power generation technologies. Four power generation technologies are selected, solid oxide fuel cell, gas turbine, gas engine, and steam turbine. Mixed-integer non-linear programming (MINLP) multi-objective optimization is developed to provide an optimal solution for minimum levelized cost of electricity (LCOE) and minimum CO2eq emissions. The optimization is conducted with a ε-constraint method using GAMS through time periods of 2020–2050. Decision variables include gasifier temperature, steam to carbon ratio, and power generation technologies. The optimization result demonstrates that the lower steam to carbon ratio gives lower LCOE and higher CO2eq emissions, and temperature variation gives no significant impact on LCOE and as it increases, CO2eq emission is reduced. It demonstrates that a gas turbine is the best option for generating electricity from 2020 to 2040 and beyond 2040 SOFC is the best option.


Corresponding author: Widodo Wahyu Purwanto, Sustainable Energy Systems and Policy Research Cluster, Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, 16424, Depok, Indonesia, E-mail:

Funding source: DRPM Universitas Indonesia

Award Identifier / Grant number: NKB-0081/UN2.R3.1/HKP.05.00/2019

Acknowledgments

The authors are grateful to the DRPM UI for financial support under the Hibah Penugasan Publikasi Internasional Terindeks 9 (PIT-9) Universitas Indonesia, Contract Number: NKB-0081/UN2.R3.1/HKP.05.00/2019.

  1. Author contribution: AS : Process simulation and optimization; WWP : Conceptual research design.

  2. Research funding: DRPM Universitas Indonesia.

  3. Employment or leadership: None declared.

  4. Honorarium: None declared.

  5. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2019-11-19
Accepted: 2020-05-02
Published Online: 2020-07-17

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