Optimizing Petrochemical Waste Valorization in Midwestern Chemical Manufacturing Facility

Thesis Abstract

The pervasive generation of petrochemical waste in manufacturing processes presents significant environmental, economic, and sustainability challenges, particularly in the Midwestern chemical industry where waste disposal costs are escalating and environmental regulations are becoming increasingly stringent. This study investigates the optimization of petrochemical waste valorization processes within a representative chemical manufacturing facility to enhance resource recovery, reduce environmental impact, and promote economic efficiency. The primary aim is to develop a comprehensive framework for improving the conversion of petrochemical waste into valuable products through innovative valorization techniques aligned with sustainable practices. The specific objectives include (1) to evaluate current waste management and valorization practices in the targeted facility; (2) to identify optimal conditions for chemical and thermal conversion processes using catalysis and thermochemical treatments; (3) to assess the technical, economic, and environmental feasibility of proposed valorization pathways; and (4) to formulate a strategic model that integrates best available techniques (BAT) for effective waste valorization. The study employs a mixed-methods research approach encompassing qualitative and quantitative analyses. A case study design guides the investigation, focusing on a petrochemical manufacturing plant in the Midwestern United States with an average annual waste generation of 15,000 tons. The population comprises operational staff, waste management personnel, and environmental engineers, with a sample size of 50 participants selected via stratified random sampling to ensure representativeness. Data collection utilizes structured interviews, process observations, and review of operational records, supplemented by laboratory analyses of waste samples. Analytical techniques include Gas Chromatography-Mass Spectrometry (GC-MS) for chemical characterization of waste streams, Statistical Process Control (SPC) for process optimization, and multivariate regression analysis to determine key factors influencing process efficiency and product quality. The study also conducts techno-economic analysis and life cycle assessment (LCA) to evaluate environmental impacts and economic viability. In laboratory experiments, thermochemical conversion techniques such as pyrolysis and gasification are tested under varying operational parameters—temperature, catalyst type, and residence time—to identify optimal operational conditions that maximize valuable outputs like syngas, bio-oil, and composite materials. Data analysis employs Analysis of Variance (ANOVA) to compare process efficiencies across different conditions and thematic analysis for qualitative insights from stakeholder interviews. Expected findings include identification of specific process parameters that significantly improve the yield and quality of valorized products; demonstration of economic benefits through reduced waste disposal costs and revenue from valuable derivatives; and quantification of environmental benefits via decreased greenhouse gas emissions and minimized landfill dependency. The results are anticipated to reveal the viability of integrating advanced catalysis and thermochemical techniques into existing waste management systems, thereby enabling sustainable resource recovery. This research advances knowledge by providing a model framework for petrochemical waste valorization tailored to midwestern industrial contexts, synthesizing chemical characterization, process optimization, and sustainability assessment. The study contributes to the body of empirical evidence supporting the strategic transition towards circular economy models within petrochemical industries. It highlights practical pathways for stakeholders to implement sustainable waste management strategies aligned with regulatory standards and environmental commitments. The main conclusion underscores that optimization of petrochemical waste valorization can substantially improve environmental outcomes and economic performance when guided by robust process analysis and stakeholder engagement. The study recommends adopting integrated waste management strategies incorporating catalytic and thermochemical technologies, fostering collaboration among industry, academia, and policymakers to support sustainable petrochemical practices. Further research should explore scaling laboratory successes to full industrial applications, investigate new catalyst formulations for specific waste streams, and examine policy incentives that promote widespread adoption of waste valorization techniques in the industry.