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<p>Biodiesel can be a promising alternative to the depleting non-renewable energy resources and their detrimental effects on the environment. Nonetheless, high-purity biodiesel synthesis with enhanced energy efficiency poses a major challenge. In the current study, a heat pump based vapor recompression cycle is incorporated in a reactive distillation (RD) process producing biodiesel in order to effectively utilize the available energy sources and minimize the process utilities. In the first case study, Aspen Plus simulations were conducted using a conventional RD process to produce biodiesel of 99.5&#xa0;mol% purity and the byproduct water of 99.9&#xa0;mol% composition. In the second case study, the vapor recompression (VRC) actuated RD process was studied. The results indicate that the total high – grade heat utilities requirement was reduced by 28% due to the VRC assistance. The annual operational costs reduction and total annual cost savings were 18.5% and 9.7% respectively. Subsequently, in the third case study, the heat integration of the VRC – RD process was carried out using pinch technology. The total operating costs further subdued significantly by 42.6%, while the TAC savings improved by 32.5%. The heat integration using pinch analysis could be a better energy optimization alternative, taking into account the installation and operational complexities associated with VRC configuration.</p>

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Heat pump assisted reactive distillation process for biodiesel production: an energy feasibility study

  • 期刊论文

  • 发表日期：

    2025年12月26日

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  • Syed Sadiq Ali

摘要

Biodiesel can be a promising alternative to the depleting non-renewable energy resources and their detrimental effects on the environment. Nonetheless, high-purity biodiesel synthesis with enhanced energy efficiency poses a major challenge. In the current study, a heat pump based vapor recompression cycle is incorporated in a reactive distillation (RD) process producing biodiesel in order to effectively utilize the available energy sources and minimize the process utilities. In the first case study, Aspen Plus simulations were conducted using a conventional RD process to produce biodiesel of 99.5 mol% purity and the byproduct water of 99.9 mol% composition. In the second case study, the vapor recompression (VRC) actuated RD process was studied. The results indicate that the total high – grade heat utilities requirement was reduced by 28% due to the VRC assistance. The annual operational costs reduction and total annual cost savings were 18.5% and 9.7% respectively. Subsequently, in the third case study, the heat integration of the VRC – RD process was carried out using pinch technology. The total operating costs further subdued significantly by 42.6%, while the TAC savings improved by 32.5%. The heat integration using pinch analysis could be a better energy optimization alternative, taking into account the installation and operational complexities associated with VRC configuration.