Commodity Production Costs Report
Styrene Production from Ethylbenzene
Styrene Operating Costs & Plant Construction Costs
This report examines the costs related to Styrene production from ethylbenzene in the United States, via a typical adiabatic dehydrogenation process.
The report provides a comprehensive study of Styrene production and related Styrene production cost, covering three key aspects: a complete description of the Styrene production process examined; an in-depth analysis of the related Styrene plant capital cost (Capex); and an evaluation of the respective Styrene plant operating costs (Opex).
The Styrene 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 Styrene 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 Styrene plant operating costs analysis covers operating expenses, including variable costs like raw materials and utilities, and fixed costs such as maintenance, labor, and depreciation.
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The process under analysis comprises the following major sections: (1) dehydrogenation; (2) crude Styrene separation and (3) purification.
* Dehydrogenation. Initially, fresh and recycled ethylbenzene are vaporized, superheated, diluted in steam and fed to dehydrogenation reactors. The reaction is carried out over fixed bed catalysts in two radial-flow, adiabatic reactors operating in series. As the dehydrogenation reaction is endothermic, reaction heat is supplied by preheated steam that is mixed with ethylbenzene upstream the first reactor and by an inter-reactor reheater. The effluent from the dehydrogenation, containing Styrene, unreacted EB, toluene and benzene by-products and impurities is directed to separation steps downstream.
* Crude Styrene Separation. The effluent from the dehydrogenation step is cooled, partially condensed, and fed to a settling drum. Vapors are disengaged from the liquid phase, compressed, cooled and passed through an absorber/stripper system, for the recovery of residual aromatics which are recycled. The aqueous phase from the settling drum is fed to a steam stripper, in which dissolved trace hydrocarbons are recovered. The organic phase – a crude Styrene stream – is directed to purification steps downstream.
* Purification. The crude Styrene stream is mixed with dinitrophenols, which act as inhibitor to lessen polymer formation throughout distillation steps downstream, carried out under vacuum. In a first distillation step, a mixture of benzene and toluene by-products is separated from the Styrene stream. This mixture is further distilled for the separation of the by-products. In a subsequent distillation step, Styrene is separated from EB, recycled to the dehydrogenation. Finally, Styrene is purified from residual impurities – mainly C9 aromatic compounds – in a last distillation step.
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Content Highlights
Plant Capital Cost Summary
Summary outlining the capital cost required for building the Styrene 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 Styrene 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 Styrene 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 Styrene 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
Other Styrene Production Cost Reports

Styrene Production from Methanol & Toluene
This report analyses the economics of Styrene production from methanol and toluene in the United States. The process evaluated is similar to Exelus Styrene Monomer Technology (ExSyM) technology. In this process, toluene is submitted to alkylation with methanol over zeolite catalyst, yielding styrene.
Details: 750 kta United States-based plant | Q3 2024 | 107 pages | Issue E | From $799 USD

Styrene Production from Propylene & Ethylbenzene
This study presents the economics of Styrene production from chemical grade (CG) propylene and ethylbenzene in the United States. The process examined is a Propylene Oxide/Styrene Monomer (POSM) technology similar to the one owned by LyondellBasell. This process involves ethylbenzene oxidation, epoxidation, hydrogenation and dehydration steps.
Details: 850 kta United States-based plant | Q3 2024 | 107 pages | Issue B | From $1,199 USD

Styrene Production from Ethane & Benzene (H2 as Co-Product)
This report presents the economics of Styrene production from ethane and benzene in the United States, with pure hydrogen as by-product. In this report, ethylbenzene (EB) is first generated from benzene and recycled ethylene. Then, fresh ethane and the EB are dehydrogenated to form ethylene and Styrene. The process analyzed is based on concepts proposed in patents issued to Dow and Snamprogetti.
Details: 750 kta United States-based plant | Q3 2024 | 107 pages | Issue C | From $1,199 USD
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