Commodity Production Costs Report
Ethylene Glycol Production from Carbon Dioxide
Ethylene Glycol Operating Costs & Plant Construction Costs
This study presents the economics of Monoethylene Glycol (MEG) production from carbon dioxide (CO2) in the United States using an electrochemical process similar to Liquid Light process. Initially, CO2 is electrochemically reduced and acidified into oxalic acid. Then, oxalic acid is esterified with methanol producing dimethyl oxalate, which is hydrogenated forming MEG.
The report provides a comprehensive study of Ethylene Glycol production and related Ethylene Glycol production cost, covering three key aspects: a complete description of the Ethylene Glycol production process examined; an in-depth analysis of the related Ethylene Glycol plant capital cost (Capex); and an evaluation of the respective Ethylene Glycol plant operating costs (Opex).
The Ethylene Glycol production process description includes a block flow diagram (BFD), an overview of the industrial site installations, detailing both the process unit and the necessary infrastructure, process consumption figures and comprehensive process flow diagrams (PFD). The Ethylene Glycol plant capital cost analysis breaks down the Capex by plant cost (i.e., ISBL, OSBL and Contingency); owner's cost; working capital; and costs incurred during industrial plant commissioning and start-up. The Ethylene Glycol plant operating costs analysis covers operating expenses, including variable costs like raw materials and utilities, and fixed costs such as maintenance, labor, and depreciation.
Key reference(s): ?
The process under analysis comprises three major sections: (1) Bromide Phase; (2) Oxalate Treatment; and (3) MEG Purification.
Bromide Phase. In an electrochemical reactor, CO2 is electrochemically reduced into oxalate at the cathode and bromide is oxidized into bromine. The catholyte and anolyte used in the process are tetrabutylammonium bromide (TBA-Br) salt dissolved in acetonitrile solvent. In this area, the oxalate is acidified to oxalic acid. First, the oxalate anions are absorbed using a basic anion exchange resin and further desorbed using hydrogen bromide dissolved in methanol. The hydrogen bromide is further removed from the oxalic acid dissolved in methanol, while the TBA-Br in acetonitrile is recovered and recycled back to the electrochemical reaction.
Oxalate Treatment. The oxalic acid solution is sent to esterification, where it reacts with methanol to produce dimethyl oxalate. The ester is hydrogenated to generate Ethylene Glycol in a gaseous phase reaction. Methanol is separated from the main product and water, and is recycled to dissolve hydrogen bromide upstream.
MEG Purification. The product stream is passed through a series of columns, in order to remove light and heavy impurities, such as 1,2-butanediol by-product. Fiber Grade Ethylene Glycol is stored.
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Professional report based on Q3 2024 economic data, ensuring timely evaluations.
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Content Highlights
Plant Capital Cost Summary
Summary outlining the capital cost required for building the Ethylene Glycol production plant examined.
Plant Capital Cost Details
Detailing of fixed capital (ISBL, OSBL & Owner’s Cost), working capital and additional capital requirements.
Plant Cost Breakdowns
Breakdown of Ethylene Glycol process unit (ISBL) costs and infrastructure (OSBL) costs; plant cost breakdown per discipline.
Operating Costs Summary
Summary presenting the operating variable costs and the total operating cost of the Ethylene Glycol production plant studied.
Operating Cost Details
Detailing of utilities costs, operating fixed costs and depreciation.
Plant Capacity Assessment
Comparative analysis of capital investment and operating costs for different Ethylene Glycol plant capacities.
Production Process Information
Block Flow Diagram, descriptions of process unit (ISBL) and site infrastructure (OSBL).
Process Consumptions
Raw materials and utilities consumption figures, by-products credits, labor requirements
Process Diagrams
Process flow diagrams (PFD), equipment list and industrial site configuration
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