催化精馏制备生物柴油过程中反应与分离协同机制及其调控

Catalytic distillation technology is an effective way to produce biodiesel, and has a very broad application prospects. However, conventional packing confined itself hydrodynamics and mass transfer characteristics, it is difficult to meet the highly coupled requirements of reaction and separations in the catalytic distillation process. The project introduces a new non-overflow catalytic packing SCPI, which has low pressure drop, high liquid holdup, easy design and other features. Take advantage of these characteristics, we regulate the location of reaction and separation zone reasonably to achieve sub-regional reaction and separation, and multi-regional coupling of the two processes. The entrainer can facilitate removal of water from the separation zone to enhance the reaction, but also makes the alcohol-water mixture layered overhead, which significantly reduces the energy consumption of the separation process. The project aims to solve the problems of strengthening and regulation in the biodiesel production process and to provide technical support and theoretical basis for large-scale biodiesel production and commercialization.

催化精馏技术是酯化法制备生物柴油的一个有效途径，应用前景十分广阔。然而，传统填料限于自身的流体力学和传质特性，难于满足催化精馏过程中反应与分离高度耦合的系统要求。本项目引入新型无溢流液体穿流结构催化填料（SCPI），充分利用SCPI低压降、高持液量、易结构设计等特性，合理调控反应和分离区位置，实现反应与分离过程的分区进行和多区域耦合强化。同时，引入夹带剂，既有利于分离区内水分的移除以强化反应过程，又可使醇-水混合物在塔顶分层回流，显著降低制备过程的能耗。项目拟将实验方法与数值模拟方法有效结合，考察SCPI空间结构、夹带剂用量、操作条件等因素对反应与分离耦合过程的影响，揭示反应与分离的强化机理、协同效应及其调控机制。项目旨在解决传统催化精馏技术制备生物柴油过程的强化与调控难题，提高生物柴油产率和纯度，为生物柴油的大规模连续化生产及商业化提供技术支持和理论依据。

本项目围绕催化精馏制备生物柴油过程中反应与分离协同机制及其调控，从酯化反应催化剂制备、生物柴油工艺过程研究、产物油分离及反应精馏过程模拟计算等几个方面展开研究工作，取得一系列研究成果。三年来，项目组成员共申请专利2项，授权1项；共发表论文 10 篇，其中包括SCI论文6篇，EI论文2篇。目前，还有两项研究工作尚未发表，正在撰写SCI论文。