Ethylene Production from Vacuum Gas Oil
Ethylene Production Costs Report | Issue M | Q2 2024
Report Details |
800 kta China-based plant | Q2 2024 | 107 pages |
This report presents a cost analysis of a 800 kta (kilo metric ton per annum) China-based plant. You can add a customized cost analysis, assuming another location (country), when ordering a premium edition of this report.
Report Abstract
This report provides a feasibility study of Ethylene production from vacuum gas oil (VGO) using a steam cracking process in China. In this process, VGO is thermally cracked in pyrolysis furnaces through the use of steam, generating ethylene and other by-products.
The report provides a comprehensive study of Ethylene production and related Ethylene production cost, covering three key aspects: a complete description of the Ethylene production process examined; an in-depth analysis of the related Ethylene plant capital cost (Capex); and an evaluation of the respective Ethylene plant operating costs (Opex).
The Ethylene 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 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 plant operating costs analysis covers operating expenses, including variable costs like raw materials and utilities, and fixed costs such as maintenance, labor, and depreciation.
Process Schematic
The process under analysis comprises three major sections: (1) Cracking and Quenching; (2) Compression and Drying; and (3) Separation.
Cracking & Quenching. A vacuum gas oil is fed to furnaces in which it is cracked, forming ethylene, propylene and other by-products. The furnace outlet stream is fed to a quench, to prevent further reactions and formation of undesirable by-products. From a decanter downstream the quench tower, fuel oil and water to waste treatment are removed. Cracked gas from the quench is sent to compression and separation.
Compression & Drying. The compression of the cracked gas is performed across 5 stages. After the third stage, carbon dioxide and sulfur are removed from cracked gas by caustic soda and water washes in a caustic scrubber. The compressed cracked gas is cooled and then dried in molecular sieves, so that most of the water is removed.
Separation. The dried cracked gas is fed to a cold box to remove hydrogen and light hydrocarbons, minimizing ethylene losses. Condensates are fed to separation columns. In the demethanizer, methane is separated from the main stream that is fed to the deethanizer. The top of the deethanizer is fed to an acetylene converter and then fractionated in the C2-splitter. Polymer grade (PG) ethylene is obtained as main product. The deethanizer bottom stream is fed to a depropanizer, which distillates C3 components. This stream is catalytically hydrotreated for impurities removal, and then fed to the C3-splitter. PG propylene is drawn from the column as a side stream. The Depropanizer bottom stream is separated into a crude C4 stream, recovered as column overhead product, and pyrolysis gasoline by-product. The crude C4 stream is condensed and fed to extraction columns, in order to separate raffinate-1. The crude butadiene stream is fed to the distillation columns so as to purify butadiene .
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Production Process Information
Process Consumptions
Labor Requirements
Plant Capital Cost Summary
Operating Cost Summary
Production Costs Datasheet
Plant Capital Cost Details
Operating Cost Details
Plant Cost Breakdowns
Plant Capacity Assessment
Process Flow Diagrams
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Content Highlights
Plant Capital Cost Summary
Summary outlining the capital cost required for building the Ethylene 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 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 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 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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