Coal-based chemical industries remain vital for energy security and economic stability in regions lacking oil and gas resources

yet face increasing pressure from net-zero targets and low-carbon competition. At the same time

global renewable energy deployment is constrained by grid limitations. This study introduces renewablization—a transformative framework that repurposes renewable electricity

heat

and hydrogen as the core of a multivector energy system for coal-based chemical plants. Adopting the philosophy of EnergyPLAN model

we demonstrate strong operational and physical synergies between renewable energy supply and energy system demands of coal-based process

enabling large-scale integration without grid dependency. Unlike fragmented approaches such as carbon capture

utilization

and storage

which remain fossil-based

or isolated green hydrogen applications lacking systemic impact

renewablization offers a unified

scalable pathway. It repositions renewable energy as the dominant energy and feedstock source

with coal retained only as a carbon input. The strategy unfolds across system-wide

unit-level

and equipment-level layers. While the concept is operationally and economically viable

it calls for the future development of dedicated simulation tools to support its complex

integrated scenarios. Renewablization thus presents a compelling alternative to coal phase-out—aligning legacy industries with climate goals while maintaining their strategic value.