Devy Kartika Ratnasari

Researching chemical recycling technologies for textile and polymer waste, focusing on hydrothermal conversion, depolymerization, and waste-to-value pathways. Designing research frameworks, evaluating process conditions, and translating scientific findings into scalable engineering solutions. Interests include reaction engineering, process development, circular materials, and industrial implementation of recycling technologies.

Process Optimization Engineer in large-scale battery manufacturing. Responsible for process capability improvement, yield optimization, statistical process control, and production stability. Delivered Cpk improvement from 1.52 to 1.67, 10% yield increase, 15–20% downtime reduction, and 25–30% lower defect variability through DOE, SPC, MSA, RCA, and continuous improvement projects. Collaborated closely with production, quality, automation, and equipment suppliers.

Conducted technology and sustainability research across batteries, hydrogen, renewable fuels, and circular materials. Delivered 50+ technical and market analyses, performed horizon scanning, and synthesized insights from 75+ expert interviews. Co-authored white papers and supported strategic decision-making through evidence-based assessments of emerging technologies and industrial trends.

Developed and optimized pilot-scale carbonization and activation processes for advanced carbon materials. Achieved >90% carbon recovery, reduced cycle time by 50%, and increased capacitance by 84% through process optimization and experimental design. Established SOPs, quality-control procedures, and stable pilot-scale workflows while supporting scale-up activities and process performance improvement.

Conducted research on catalytic thermochemical conversion of biomass and waste plastics, including reactor operation, process optimization, catalyst evaluation, and scale-up studies. Improved bio-oil and carbon yields by 25–35% through systematic optimization of catalyst beds and process parameters. Operated pilot-scale pyrolysis systems, coordinated activities within a €2.5M EU project, and collaborated with industrial and academic partners.

Supported process development projects focused on recovery and valorization of dairy industry waste streams. Conducted experimental work, process evaluation, and data analysis to assess recovery pathways and improve resource utilization in food-processing operations.

Supported environmental and process engineering activities in refinery operations, including GC-MS wastewater analysis, SOP improvement, and process risk assessment. Contributed to analytical investigations and operational improvement initiatives within an industrial oil and gas environment.