CN215540906U

CN215540906U - Oxygen-free batch production system of Pt/C catalyst

Info

Publication number: CN215540906U
Application number: CN202122291135.6U
Authority: CN
Inventors: 张鑫; 郑兴华; 李应龙
Original assignee: Suzhou Xinhe Zhida Energy Technology Co ltd
Current assignee: Suzhou Xinhe Zhida Energy Technology Co ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-01-18
Anticipated expiration: 2031-09-22

Abstract

The utility model discloses an anaerobic batch production system of a Pt/C catalyst, which comprises: the reation kettle still includes: an oxygen-free unit and a thermal cycle unit; the anaerobic unit is connected with the reaction kettle through a first pipeline, and inert gas is introduced into the reaction kettle through the anaerobic unit; the outer wall of the reaction kettle is provided with a hollow temperature adjusting cavity, and the thermal circulation unit is communicated with the temperature adjusting cavity. The utility model solves the problem that platinum is oxidized in the production process of batch production of the Pt/C catalyst, avoids the influence of platinum oxidation on the performance of the Pt/C catalyst, greatly shortens the time in the washing process, obviously improves the cleanliness and the yield, and avoids the waste process.

Description

Oxygen-free batch production system of Pt/C catalyst

Technical Field

The utility model relates to the technical field of catalyst production, in particular to an oxygen-free batch production system of a Pt/C catalyst.

Background

Different from the traditional platinum-carbon catalyst for chemical engineering, the platinum-carbon catalyst for the fuel cell has platinum loading capacity generally up to more than 20%, requires platinum nanoparticles with particle size of 2-5 nm, narrow particle size distribution, uniform dispersion on carbon and no harmful impurities, and thus has better activity and stability. However, the platinum nanoparticles with the diameter of 2-5 nm have very large surface energy and are easy to agglomerate, so that the batch preparation process has very high difficulty, and platinum is easy to oxidize in the preparation process.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the utility model is to overcome the defects that the mass production is not easy and the platinum is easy to oxidize in the prior art.

In order to solve the above technical problems, the present invention provides an oxygen-free mass production system of Pt/C catalyst, comprising: the reation kettle still includes: an oxygen-free unit and a thermal cycle unit;

the anaerobic unit is connected with the reaction kettle through a first pipeline, and inert gas is introduced into the reaction kettle through the anaerobic unit;

the outer wall of the reaction kettle is provided with a hollow temperature adjusting cavity, and the thermal circulation unit is communicated with the temperature adjusting cavity.

As a preferable mode of the utility model, the reaction kettle is provided with a stirrer, and the stirrer extends into the inner cavity of the reaction kettle.

As a preferable mode of the present invention, the reaction kettle is further provided with a regulator, and the regulator is electrically connected to the stirring device.

As a preferable mode of the present invention, the anaerobic washing device further comprises a washing unit, wherein the washing unit comprises a cylinder body and a flusher, and the anaerobic unit is connected with the cylinder body through a second pipeline.

As a preferable mode of the present invention, the discharge port of the reaction kettle is connected to the cylinder through a third pipeline.

In a preferred mode of the utility model, the cylinder body is provided with a plurality of cylinder bodies, adjacent cylinder bodies are communicated with each other,

in a preferred embodiment of the present invention, the third pipe is connected to any one of the cylinders.

In a preferred embodiment of the present invention, the flusher is connected to the cylinder through a fourth pipe.

As a preferable mode of the present invention, the flusher is connected to the reaction kettle through a fifth pipe.

As a preferred mode of the present invention, the thermal cycle unit includes a water outlet pipe and a water inlet pipe, and the water outlet pipe and the water inlet pipe are respectively communicated with the temperature adjustment cavity.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

the oxygen-free batch production system of the Pt/C catalyst realizes batch production of the Pt/C catalyst of the fuel cell, provides an oxygen-free environment when the Pt/C catalyst of the fuel cell is produced in batch, and avoids platinum from being oxidized to influence the performance of the Pt/C catalyst. Meanwhile, the Pt/C catalyst can be quickly and efficiently washed, and the yield of the Pt/C catalyst is improved.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference will now be made in detail to the present disclosure, examples of which are illustrated in the accompanying drawings.

FIG. 1 is a schematic diagram of an oxygen free batch production system for Pt/C catalysts of the present invention.

The specification reference numbers indicate: 1. the system comprises a reaction kettle, 11, a temperature regulating cavity, 12, a stirrer, 13, a regulator, 14, a feed inlet, 15, a discharge valve, 21, an air bottle, 22, a pressure gauge, 23, a flow meter, 3, a thermal cycle unit, 31, a water outlet pipe, 32, a water inlet pipe, 41, a cylinder body, 411, a water outlet, 42, a water bucket, 43, a water pump, 51, a first pipeline, 52, a second pipeline, 53, a third pipeline, 54, a fourth pipeline, 55, a fifth pipeline, 61, a first valve, 62, a second valve, 63, a third valve, 64, a fourth valve, 65 and a fifth valve.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "second" or "first" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features, or indirectly contacting the first and second features through intervening media. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements does not include a limitation to the listed steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1, an embodiment of an oxygen-free batch production system of Pt/C catalyst according to the present invention includes: reation kettle 1 still includes: an oxygen-free unit, a thermal cycle unit 3.

The reaction kettle 1 is provided with a stirrer 12, and the stirrer 12 extends into the inner cavity of the reaction kettle 1. The reaction kettle 1 is also provided with a regulator 13, and the regulator 13 is electrically connected with the stirring device.

The oxygen-free unit is connected with the reaction kettle 1 through a first pipeline 51, and inert gas is introduced into the reaction kettle 1 through the oxygen-free unit.

The outer wall of the reaction kettle 1 is provided with a hollow temperature adjusting cavity 11, and the thermal circulation unit 3 is communicated with the temperature adjusting cavity 11. The thermal circulation unit 3 comprises a water outlet pipe 31 and a water inlet pipe 32, and the water outlet pipe 31 and the water inlet pipe 32 are respectively communicated with the temperature adjusting cavity 11. The thermal circulation unit 3 is used for introducing temperature-adjusting hot water into the temperature-adjusting cavity 11 through the water outlet pipe 31 and the water inlet pipe 32 to adjust the temperature in the reaction kettle 1.

Specifically, the stirrer 12 of the reaction kettle 1 stirs the contents in the inner cavity of the reaction kettle 1. The regulator 13 is used for controlling the on/off of the agitator 12 and regulating the speed of the agitator 12. Preferably, the regulator 13 is also used for monitoring the temperature in the reaction tank 1.

The anaerobic unit comprises a gas cylinder 21, a flowmeter 23, a pressure device 22 and a first valve 61, wherein inert gas is filled in the gas cylinder 21, the gas cylinder 21 is used for introducing the inert gas into the reaction kettle 1 through a first pipeline 51, and the inert gas is used for manufacturing an anaerobic environment in the reaction kettle 1 to avoid the oxidation of materials. The flowmeter 23 and the first valve 61 are arranged on the first pipeline 51, the pressure valve is arranged on the gas bottle 21, the pressure device 22 is used for regulating the pressure of the gas, and the flowmeter 23 is used for regulating the flow rate of the gas.

Anaerobic batch reaction: after all valves are closed, the pressure regulator 22 is opened to regulate the appropriate pressure, the first valve 61 is opened, the flow meter 23 is regulated to the appropriate flow rate, the inert gas in the gas cylinder 21 is led to the reaction kettle 1, the gas is led in for the appropriate time to drive the oxygen in the reaction kettle 1, the thermal circulation unit 3 is opened to regulate the appropriate temperature, the raw materials are added from the feed inlet 14 of the reaction kettle 1, the stirring speed of the stirrer 12 is regulated through the regulator 13, and the temperature of the reaction kettle 1 is monitored, so that the anaerobic batch reaction is started.

Wherein the inert gas may be nitrogen.

The system further comprises a washing unit comprising a cylinder 41, a flusher, the oxygen-free unit being connected to the cylinder 41 via a second conduit 52. The discharge port of the reaction vessel 1 is connected to the cylinder 41 through a third pipe 53. The cylinder 41 is provided with a plurality of adjacent cylinders 41 which are communicated with each other, and the third pipeline 53 is connected with any one cylinder 41. The flusher is connected to the cylinder 41 by a fourth conduit 54. The flusher is connected to the reaction vessel 1 via a fifth line 55.

Specifically, the flusher further comprises a water bucket 42 and a water pump 43, and deionized water is stored in the water bucket 42. The water pump 43 is used to pump the deionized water in the water tub 42 and output it to the cylinder 41 through the fourth pipe 54 and to the reaction tank 1 through the fifth pipe 55. The fourth conduit 54 is provided with a fourth valve 64 and the fifth conduit 55 is provided with a fifth valve 65.

A third valve 63 is provided on a third pipe 53 connecting the reactor 1 and the cylinder 41. At least one or three cylinders 41 are provided, adjacent cylinders 41 are communicated with each other, and the reaction kettle 1 can be connected with one of the cylinders 41. The flusher is in communication with any cylinder 41.

The oxygen-free unit is connected with any cylinder 41 through a second pipeline 52, the second pipeline 52 is provided with a second valve 62, and the cylinder 41 is enabled to reach a certain pressure by adjusting the high pressure and the low pressure of the gas bottle 21.

As an implementation mode, the bottom of the container of the cylinder body 41 is detachable, so that the cleaned fuel cell Pt/C catalyst can be conveniently taken out, uniform holes are distributed on the bottom of the container of the cylinder body 41, filter paper is paved on the holes in the cleaning process, the holes achieve a drainage effect, the cylinder body 41 is made of transparent organic glass, the cleaning effect can be conveniently observed, and the cylinder body 41 is of a sealing structure except the bottom.

Washing treatment after batch reaction is completed: opening a discharge valve 15 and a third valve 63 of the reaction kettle 1, flowing the reactants in the reaction kettle 1 into a cylinder 41, adding deionized water into a water bucket 42, opening a water pump 43 and a fifth valve 65, flushing the reactants remained in the reaction kettle 1 by the deionized water through a fifth pipeline 55, flushing the residues, closing the discharge valve 15 and the third valve 63, closing a first valve 61 and a flowmeter 23, opening a second valve 62, adjusting a pressure regulator 22 to a proper pressure, introducing inert gas into the cylinder 41, filtering the reactants in the cylinder 41 through air pressure compression, discharging wastewater through a water outlet 411 at the bottom of the cylinder 41, closing the second valve 62 after discharging water, opening a water pump 43, opening a fourth valve 64, introducing water into the cylinder 41, closing the water pump 43 after the cylinder 41 is full of water, closing the fourth valve 64, opening the second valve 62, introducing gas into the cylinder 41, and (4) performing compression filtration, repeatedly introducing water into the cylinder body 41, performing compression filtration until the reactant is washed to a standard range, closing all valves, taking out the reactant in the cylinder body 41, and drying. And water is introduced into the reaction kettle 1 and the cylinder 41 at different time periods through a switch valve, so that the effect of washing the Pt/C catalyst is achieved.

The system is carried out under the protection of oxygen-free gas in both reaction and filtering washing, thereby effectively preventing oxidation.

the anaerobic batch production system of the Pt/C catalyst solves the problem that platinum is oxidized in the production process of the batch production of the Pt/C catalyst, avoids the problem that the platinum is oxidized to influence the performance of the Pt/C catalyst, greatly shortens the time in the washing process, obviously improves the cleanliness and the yield, and avoids the waste process.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the utility model may be made without departing from the spirit or scope of the utility model.

Claims

1. An oxygen-free mass production system of a Pt/C catalyst, comprising: reation kettle, its characterized in that still includes: an oxygen-free unit and a thermal cycle unit;

2. The oxygen-free batch production system of Pt/C catalyst of claim 1, wherein the reaction kettle is provided with a stirrer, and the stirrer extends into the inner cavity of the reaction kettle.

3. The oxygen-free batch production system of Pt/C catalyst of claim 2, wherein the reaction kettle is further provided with a regulator, and the regulator is electrically connected with the stirrer.

4. The oxygen-free batch production system of Pt/C catalyst of claim 1 further comprising a washing unit, the washing unit comprising a cylinder, a flusher, the oxygen-free unit connected with the cylinder through a second pipe.

5. The oxygen-free batch production system of the Pt/C catalyst as claimed in claim 4, wherein the discharge port of the reaction vessel is connected with the cylinder body through a third pipeline.

6. The oxygen-free batch production system of a Pt/C catalyst of claim 5, wherein the cylinder block is provided in a plurality, and adjacent cylinder blocks are communicated with each other.

7. The oxygen-free batch production system of a Pt/C catalyst of claim 6 wherein the third conduit is connected to any one of the cylinders.

8. The oxygen-free batch production system of Pt/C catalyst of claim 4, wherein the flusher is connected with the cylinder by a fourth pipe.

9. The oxygen-free batch production system of Pt/C catalyst of claim 8, wherein the flusher is connected to the reaction kettle by a fifth pipe.

10. The oxygen-free batch production system of the Pt/C catalyst of claim 1, wherein the thermal cycle unit comprises a water outlet pipe and a water inlet pipe, and the water outlet pipe and the water inlet pipe are respectively communicated with the temperature adjusting cavity.