Electrochemical hydrogen pump for preparing high-pressure hydrogen

[0049]Example one:

[0050]Such asfigure 1 withfigure 2 As shown, the low-pressure hydrogen inlet 11 and the low-pressure hydrogen outlet 12 are processed on one side of the fastening end plate 1 and the insulating plate 3 and the positive plate 4, and the end plate 1 and the insulation plate 3 and the negative plate 5 are fastened on the other side. Process a high-pressure hydrogen outlet 13. Between the fastening end plate 1 and the insulating plate 3, between the insulating plate 3 and the electrode plates 4, 5, and between the positive plate 4, the negative plate 5 and the separation fixing plate 6, seals are made. Select the original plate 6a of the partition fixed plate with the same thickness as the gas-liquid transmission plate 7, and process it to have a built-in step shape 6, and process the gas-liquid transmission plate into a corresponding boss shape 7, such asfigure 1 As shown, the separation fixing plate-gas-liquid transmission plate assembly formed by the convex-concave combination effectively supports the membrane electrode so that it does not deform under high pressure. The membrane electrode assembly 8 is prepared according to the conventional method of a hydrogen air fuel cell.

[0051]Such asfigure 2 As shown, the fastening end plate 1, the insulating plate 3, the positive plate 4, the first gas chamber assembly 6-7, the first membrane electrode assembly 8, and the second gas chamber assembly 6-7 are assembled in sequence on the low-pressure hydrogen side. , The second membrane electrode assembly 8, the third air chamber assembly 6-7, the third membrane electrode assembly 8, the fourth air chamber assembly 6-7, the fourth membrane electrode assembly 8, the fifth air chamber The components 6-7, the negative plate 5, the insulating plate 3, and the fastening end plate 1 are finally fastened with bolts 2 to form a multi-stage electrochemical hydrogen pump. This embodiment is a four-stage electrochemical hydrogen pump.

[0052]The first air chamber is formed in the first air chamber assembly 6-7, the internal pressure is P1; A second air chamber is formed in the second air chamber assembly 6-7, and the internal pressure is P2; The third block of the gas chamber assembly 6-7 forms a third chamber, the internal pressure is P3; A fourth air chamber is formed in the fourth air chamber assembly 6-7, and the internal pressure is P4; A fourth air chamber is formed in the fifth air chamber assembly 6-7, and the internal pressure is P5. Under the action of an external DC electric field, the pressure of the first air chamber is P1The hydrogen gas is dissociated into protons under the action of the positive electrode electrocatalyst of the first membrane electrode assembly 8 and then passes through the proton conductive membrane in the first membrane electrode assembly 8 and then becomes the negative electrode electrocatalyst on the other side of the first membrane electrode assembly 8. The pressure generated under the action is P2The hydrogen gas passes through the second gas chamber in the second gas chamber assembly 6-7 to the anode electrocatalyst of the second membrane electrode assembly 8 and dissociates into protons passing through the second membrane electrode assembly 8 After conducting the membrane, the pressure P is generated under the action of the negative electrode electrocatalyst on the other side of the second membrane electrode assembly 8.3And so on, and finally the pressure in the fifth gas chamber is P5Of hydrogen. Hydrogen is the reciprocating transformation of hydrogen-proton-hydrogen, and conduction is the reciprocating transformation of electronic conduction-proton conduction-electronic conduction. According to the aforementioned formula 1: E=(RT/2F)ln(P2/P2)+ir, under the action of an external electric field, after the first hydrogen pump, the hydrogen pressure changes from P1Increase to P2; After the second hydrogen pump, the hydrogen pressure changes from P2Increase to P3; And so on, and finally pressurize to P5. Since each pressurization process is an exponential level, a higher pressure can be reached after multi-level pressurization.

[0053]Embodiment two:

[0054]Such asimage 3 withFigure 4 As shown, the difference between this embodiment and Embodiment 1 lies in the difference of the air chamber components 6-7. In this embodiment, the original plate 6a of the separating and fixing plate is selected, and recesses 6 are machined on both sides of the separating and fixing plate, and through holes 9 and 10 are formed on the separating and fixing plate, and the gas-liquid transmission plate is processed and embedded in the separating and fixing plate. In the concave platform. When a multi-stage hydrogen pump was used and multiple partitioned fixed plates were used, the gas-liquid channels processed on the adjacent partitioned fixed plates should preferably be misaligned to allow the gas and liquid to flow fully. Under the premise of ensuring good support, the gas-liquid channel can be one or more.