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• W4225833560 endingPage "120598" @default.
• W4225833560 startingPage "120598" @default.
• W4225833560 abstract "• Intensified processes for energy-efficient production of dimethyl carbonate are proposed. • Internal or external heat integration was conjugated with a vapor recompression heat pump. • CFD and process simulations are performed to validate heat transfer rates and energy savings. • Hybrid heat integration reduces energy, cost and CO 2 emissions by higher than 35%. This study presents energy-efficient design alternatives for dimethyl carbonate production by combining various heat integration routes of reactive and pressure-sensitive distillation columns. The design of the hybrid heat-integrated sequences was based on internal and external heat integration with a vapor recompression heat pump (VRHP). The conventional pressure-swing separation design and the proposed hybrid heat integration processes were compared subject to a constraint of high product purity of 99.5%. The combined sequence of internal and external heat integration resulted in a cost reduction of 30.28% by eliminating the low-pressure (LP) column reboiler. The VRHP combined with external heat integration fully eliminated the heat duty of the high-pressure (HP) column condenser and the LP column reboiler, resulting in 38.33% energy savings and a 37.5% reduction in CO 2 emissions. The two hybrid sequences with external heat integration showed better energy and economic efficiency and more reduced CO 2 emissions than the VRHP combined with internal heat integration, since the reflux flow rate of the HP column and the reboil flow rate of the LP column were dramatically reduced ." @default.
• W4225833560 created "2022-05-05" @default.
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• W4225833560 date "2022-04-01" @default.
• W4225833560 modified "2023-10-10" @default.
• W4225833560 title "Enhanced energy efficiency and reduced CO2 emissions by hybrid heat integration in dimethyl carbonate production systems" @default.
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• W4225833560 doi "https://doi.org/10.1016/j.seppur.2022.120598" @default.
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