Transcription of V. CASE STUDY: COMPARISON OF ETHYLENE …
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V. CASE STUDY: COMPARISON OF ETHYLENE …
V. CASE STUDY: COMPARISON OF ETHYLENE GLYCOL VERSUSPROPYLENE GLYCOL-BASED ANTIFREEZE SOLUTIONSA. IntroductionThis case study demonstrates the quanitative and qualitative informationcollected through application of the multi-disciplinary life cycle frameworksuggested in the previous section of this document. It analyzes the productionand utilization trade-offs associated with ETHYLENE glycol (EG; 1, 2-ethanediol)and propylene glycol (PG; 1, 2-propanediol) based antifreeze products. Speci-fically, the case study focuses on their use in water-based coolant systems ofinternal combustion engines1. Additional components added to antifreezeproducts include corrosion inhibitors, anti-foaming agents, coloring agents, andmetal and glycol antioxidants (66). The following chemical constituents of EGand PG-based antifreeze formulations are considered in the Franklin Associates,Ltd.
Applicable data regarding the life cycle of PG and EG antifreeze solutions are limited due to its proprietary nature. Therefore, some aspects of the analysis
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