Benzene Production from Pygas (Hydrodealkylation Process)
Benzene Production Costs Report | Issue D | Q2 2024
Report Details |
250 kta United States-based plant | Q2 2024 | 107 pages |
This report presents a cost analysis of a 250 kta (kilo metric ton per annum) United States-based plant. You can add a customized cost analysis, assuming another location (country), when ordering a premium edition of this report.
Report Abstract
This analysis presents the economics of Benzene production from pyrolysis gasoline (pygas) in the United States using a typical hydrodealkylation process. Initially, pygas is fractionated into 3 hydrocarbon cuts. The C6-C8 fraction is then directed to the hydrodealkylation step, in which the aromatics content in the process stream are converted into benzene
The report provides a comprehensive study of Benzene production and related Benzene production cost, covering three key aspects: a complete description of the Benzene production process examined; an in-depth analysis of the related Benzene plant capital cost (Capex); and an evaluation of the respective Benzene plant operating costs (Opex).
The Benzene 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 Benzene 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 Benzene 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) Hydrogen Treatment; (2) Reactions; and (3) Purification.
Hydrogen Treatment. The gaseous stream from the flash drum, is mixed with a reformer grade hydrogen make-up stream, and then fed to a the bottom of a multi-stage absorber column. The purpose is to remove residual hydrocarbons from the hydrogen-rich feed stream, avoiding the build-up of impurities in the process. The washed hydrogen-rich gas is compressed and heated, before being mixed with the feed mixture.
Reactions. Initially, the pyrolysis gasoline is fractionated for the removal of C5- and C9+ components from the gasoline. The feed is then combined with recycled (unconverted) aromatics, forming a mixture that is vaporized by hot hydrogen and fed to a pre-treatment reactor along with hydrogen. In the pre-treatment reactor, diolefins, cyclic diolefins, and styrene are selectively hydrogenated in the presence of catalysts (cobalt molybdate on alumina), and a portion of thiophene and other sulfur compounds are converted to H2S. The hydrogenated effluent from the pre-treatment reactor is heated and subsequently fed to fixed-bed reactors operating in series, where hydrocracking of nonaromatics and dealkylation of aromatics to benzene are carried out in the presence of chromia-alumina catalyst. While dealkylation reactions are exothermic, the reaction temperature is controlled by recycling cold hydrogen between catalysts beds.
Purification. The resulting effluent from the dealkylation reactors is cooled and fed to a flash drum for the recovery of hydrogen.The liquid outlet is stabilized, clay treated and then fractionated to obtain a finished benzene product.
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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 Benzene 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 Benzene 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 Benzene 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 Benzene 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 Benzene Production Cost Reports
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Details: 250 kta United States-based plant | Q2 2024 | 107 pages | Issue G From $799 USD
The cost analyses presented in this report target a 250 kta (kilo metric ton per annum per annum) United States-based plant. For those interested in cost analyses considering other plant capacities and/or locations, Intratec offers a customized analysis as an optional feature.
Benzene from Toluene (Hydrodealkylation)
This study presents the economic analysis for the construction of an industrial plant for Benzene production from toluene in the United States. This study reviews a toluene hydrodealkylation (THDA) technology similar to Houdry's Detol. In this process, toluene is converted over a fixed-bed catalyst into Benzene.
Details: 250 kta United States-based plant | Q2 2024 | 107 pages | Issue I From $799 USD
The cost analyses presented in this report target a 250 kta (kilo metric ton per annum per annum) United States-based plant. For those interested in cost analyses considering other plant capacities and/or locations, Intratec offers a customized analysis as an optional feature.
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