Microchannel gas-liquid reactor with Koch curve structure

[0024] The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0025] figure 1 , shows a specific embodiment of a microchannel reactor with a Koch curve structure of the present invention. The Koch curve structure microchannel reactor 2 includes a stainless steel cover plate, an acrylic cover plate and a microchannel reactor body. In the case of continuous flow, use MEA solution for CO 2 carry out an absorption reaction. The reactor is also connected with a feeding system, a flow control system, an overall temperature control system of the reactor, a power system, a tail gas analysis system, and the like.

[0026] Specifically, CO 2 and N 2 The flow rate of the mixed gas comes out from the gas cylinder, and the flow rate is controlled by a flowmeter. A volumetric flask is used to prepare a certain concentration of MEA solution, which is combined with the gas at the tee through a peristaltic pump to form a gas-liquid two-phase reaction from the inlet of the reactor. device. The liquid phase is circulated, and the gas phase is directly discharged. After many bendings of the Koch curve 1 structure, CO in the reactants 2 Continuous collision with the MEA solution forms a relatively uniform and fully contacted two-phase mixture. In addition, a water tank made of quartz should be added to the microchannel gas-liquid reactor to ensure that the reactor is carried out at a suitable and constant temperature. By bending the inside of the reactor for many times, the gas-liquid two phases can be effectively contacted, so as to achieve the purpose of enhancing mass transfer.

[0027] like figure 2 , the gas-liquid microchannel reactor with Koch curve structure shown, the main body of the reactor is made of 3D printing photosensitive resin material, the overall size of the reactor is 140×108×6mm, and the effective channel size is 81×7.8mm, The depth of the fractal microchannel is 2.5mm, the length of each segment is 3mm, and the width is 1mm. A groove with a depth of 1.5 mm and a width of 2 mm is arranged around the reaction channel for installing the sealing ring. There are 3/8 inch threads in the corresponding positions of the stainless steel cover plate, the acrylic cover plate and the microchannel reactor plate, respectively. All connections are well sealed.

[0028] The specific working mode of the reactor in this embodiment is as follows: firstly, the gas circuit switch is turned on to set the flow rate of the flow meter, then the peristaltic pump is turned on, and the constant temperature water tank switch is turned on to keep the temperature constant at room temperature. Set the gas flow to 20ml/min and the liquid flow to 20ml/min. The reacted gas was connected to a mass spectrometer online monitor for real-time analysis.

[0029] In the reactor scale-up design, it is only necessary to connect several reactors with Koch curve structure in series, and at the same time increase the flow of gas and liquid. If the reactors with the Koch curve structure are connected in series, the gas-liquid microchannel reactor with the Koch curve structure of the present invention is connected to each inlet, and the products flowing out of the last reactor are collected and recovered.

[0030] The above examples are intended to illustrate the disclosed embodiments of the present invention, and should not be construed as limiting the present invention. Furthermore, various modifications set forth herein and variations in the methods and compositions of the invention will be apparent to those skilled in the art without departing from the scope and spirit of the invention. Although the present invention has been described in detail in conjunction with various specific preferred embodiments of the present invention, it should be understood that the present invention should not be limited to these specific embodiments. Indeed, various modifications as described above which are obvious to those skilled in the art to obtain the invention are intended to be included within the scope of the present invention.