Document Type

Article

Publication Date

2024

Abstract

Climate change is the leading severe problem in the twenty-first century, which is associated with greenhouse gas emissions,carbon dioxide that is the foremost cause of global warming and super greenhouse effect. In this concern, to avoid hazardousproblems, the steady stream of CO2 effluents existing in the atmosphere must be transformed to beneficial products for beingused as an abundant chemical feedstock. Implementing a new green strategy, which is known for the catalytic hydrogenationof CO2 into alternative fuels and valuable chemicals, will be a long-lasting solution to alleviate CO2 emissions. In this paper,a process simulation showing the synthesis of dimethyl ether (DME) from CO2 hydrogenation (CO2 produced from EL-Sewedy cement industry) is performed using Aspen HYSYS V10 to attain a complete distinctive design for all equipmentfor producing a capacity of 475,000 tons per year, while energy integration is performed using Energy Analyzer Simulationsoftware. In the main model, catalytic dehydration is done in a single-pass reactor, and then separation in multi-column productseparations. Other configurations were tested by developing three simulation models with different reactors, a double pipereactor and membrane reactor were with the aim of modification for higher energy efficiency and lower operating and capitalcosts. Moreover, an economic and environmental study was obtained for the basic & the integrated case, which showed thatthe total annual/capital costs based on the “base case” are estimated to be 90 million USD without heat integration while theoptimum and integrated costs are found to be 100 Million USD. Finally, process optimization and integration were obtainedto reduce the utilized energy of the hot & cold utilities by 90% and 60%, respectively.

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