Mass Balance Accounting Rules for Chemical Recycled Polymers
Mass balance accounting requires rigorous yield loss deductions and fuel exclusion rules to legally defend circular resin claims during regulatory audits.
Steam Cracker Attribution
Meaning
Accounting methodologies assign sustainable or recycled characteristics to specific outputs from high-temperature furnaces using mass balance logic. Steam cracker attribution allows a resin producer to label specific polyethylene or polypropylene quantities as recycled based on oil input levels. It handles the problem of physically mixing sustainable and fossil feedstocks.
Operational Logic
Furnaces do not distinguish between molecules from plastic waste and molecules from crude oil during the cracking process. Through steam cracker attribution, the total volume of certified pyrolysis oil entered at the start is converted into an equivalent volume of credits. These credits travel with the mass even when atoms shift.
Verification Process
Independent auditors check that the math behind the credit transfer matches the technical yield of the unit. Errors in steam cracker attribution arise if the firm claims more circular material than the equipment can realistically produce. These logs are transparent to ensure consumer trust in the label.
Commercial Scope
Producers sell attribution-linked plastics at a price that reflects the cost of the renewable feedstock. Because steam cracker attribution is a virtual allocation, it permits global companies to share green benefits across multiple distant production sites. The material stays identical in performance to virgin resin.