Techno-Economic Evaluation of Suralaya CFPP Unit 1 Coal Gasification for Gas Supply Cilegon CCPP

Abstract

The Indonesian government’s energy transition policy includes phasing out Coal-Fired Power Plants (CFPPs), such as Suralaya CFPP Unit 1, and addressing natural gas limitations in Combined Cycle Power Plants (CCPPs) like Cilegon CCPP. This study introduces a novel approach as the first to integrate syngas production using Mitsubishi Heavy Industries (MHI) entrained-flow gasifier fueled by coal from a retiring CFPP to support CCPP operations. The innovation lies in repurposing decommissioned CFPP assets, reducing dependence on natural gas while leveraging advanced gasification technology to maintain power generation efficiency. The MHI gasifier achieves 99,9% carbon conversion with CGE 77,2 % and produces syngas with an LHV of 4,575 MJ/kg, enabling a combined cycle output of 306 MW with 50,36% efficiency. This process also reduces air consumption by 25%, from 2.188.000 kg/h to 1.650.000 kg/h, contributing to environmental sustainability. Economic analysis estimates construction costs at Rp41,3 trillion for the gasification plant and Rp1,02 trillion for a 15 km gas pipeline from Suralaya to Cilegon. This study pioneers a pathway for integrating gasification technology into Indonesia’s energy infrastructure, demonstrating a practical and sustainable strategy to transition from coal dependence to cleaner energy systems while maximizing efficiency and minimizing environmental impact.