应用微反应器合成环状碳酸酯的工艺与模拟
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作者单位:

1.中海油石化工程有限公司;2.大连理工大学 精细化工国家重点实验室

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中图分类号:

TQ216

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中央高校基本科研业务费资助(DUT20TD111)


Process and simulation of synthesis of cyclic carbonate in microreactor
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1.CNOOC Petrochemical Engineering Company Limited,ShanDong,JiNan;2.State Key Laboratory of Fine Chemicals,Dalian University of Technology,LiaoNing,DaLian

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    摘要:

    应用分子内双功能催化剂,设计了利用环氧烷烃和CO2偶合反应合成环状碳酸酯的连续微通道工艺,考察了催化剂用量、反应温度、反应压力、CO2与环氧烷烃比例对反应的影响。实验结果显示,即使在较温和条件(120 ℃、1.5 MPa)和较低催化剂用量下(0.5‰ mol),环氧烷烃仍可高效地转化为相应的环状碳酸酯,反应30 s环氧烷烃转化率可达78%。在相同条件下,微通道反应工艺转化速率是传统釜式反应工艺的1.8倍。这表明所设计的微通道反应工艺对反应过程中气液混合传质具有显著强化作用。通过fluent软件模拟微通道中气液混合情况,研究了不同工况对环氧烷烃与CO2混合效果的影响。结合实验结果分析表明,影响气液混合的关键因素为气体扰动。

    Abstract:

    The continuous microreactor process for the synthesis of cyclic carbonates by the coupling reaction of epoxide and CO2 was designed, using an intramolecular bifunctional catalyst. The effects of catalyst loading, temperature, pressure, and ratio of CO2 to epoxide on the coupling reaction were investigated. The experimental results show that the epoxide can be efficiently converted to the corresponding cyclic carbonate even at mild conditions (120 °C, 1.5 MPa), lower catalyst concentrations (0.5‰ mol), the conversion rate of epoxide can reach 78% within 30 s. Under the same conditions, the continuous microreactor process exhibited 1.8 times efficiency to that of the traditional tank reaction process. These results indicate that the designed microchannel reaction process can significantly enhance the gas-liquid mixing mass transfer during the reaction. Fluent software was used to simulate the gas-liquid mixing in the microreactor for exploring the effect of different working conditions on the CO2-epoxide mixing. Combined with the analysis of experimental results, it is shown that the gas disturbance plays a key factor in affecting gas-liquid mixing.

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贺同强,李明燃,蒋宾伟,任伟民.应用微反应器合成环状碳酸酯的工艺与模拟[J].精细化工,2023,40(2):

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  • 收稿日期:2022-06-08
  • 最后修改日期:2022-10-17
  • 录用日期:2022-10-18
  • 在线发布日期: 2023-01-17
  • 出版日期: 2022-09-30