REDESIGN OF PYROLYSIS REACTOR FOR SUSTAINABLE DISPOSABLE MASK WASTE PROCESSING

• Main Author: Setiabudi Utama, Pandu
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/84941
• Institution: Institut Teknologi Bandung

A total of 200 million tons of polypropylene-based masks become waste annually. Previous research on mask waste processing showed that pyrolysis can be energy self-sufficient. Pyrolysis technology has been applied for mask processing at PIAT UGM, but it had high energy process requirements. Therefore, a redesign of the pyrolysis equipment was necessary to achieve results according to existing research, enabling sustainable mask waste processing. The redesign of the pyrolysis reactor was carried out by considering DR&O and the operating scheme based on the optimum parameters of the mask pyrolysis process from existing research which the operational temperature was 460 ? and evaluation of the PIAT UGM’s pyrolysis reactor. The equipment design included a main reactor, insulation, condenser, and burner. The reactor and insulation design was optimized to achieve the lowest total manufacturing cost and fuel requirements, the condenser design was based on cooling load of pyrolysis gas products, and the burner power was based on the heating rate requirements of the equipment. The redesigned pyrolysis equipment features a reactor capacity of 16 kg per batch, L/D ratio of 1.27, 12.5 cm insulation thickness with a surface temperature of 65 ?, 9 meter condenser length, and 39.58 kW thermal burner power. Each batch of maximum-capacity mask waste should produce 12.44 liters of oil with 1.48 liters of fuel required and a net oil yield of 10.96 L. Economic feasibility study in Sleman Regency, with 80% oil sales and a price of Rp10,000 per liter, resulted in NPV of Rp109,871,493 and IRR of 59.7% at a 18% discount rate over 10 years. It can be concluded that the pyrolysis reactor will achieved energy sustainability and suitable for sustainable implementation.