As a new energy source and development, many laboratories at home and abroad are now turning to the photocatalytic test. In China, the devices of photochemical reactors are now widely used in universities and chemical research institutes, but still Many experimenters appear to be stunned when choosing a photocatalytic reaction device. Mismatches, mismatches, or misconfigurations often occur frequently. In view of this, the following suggestions are provided to the teacher who chooses the configuration.
First, the state of the reactants, mostly liquid, liquid-liquid reaction, solid-liquid reaction, gas-liquid reaction, such photocatalytic reaction device zui is widely, the price is also relatively favorable; in addition, the gas photocatalytic reaction device has gradually entered the major In the laboratory, since most of these reaction vessels are made of glass, most of them cannot withstand too much pressure, and they can be used by a small amount of liquid-liquid reaction device, which is more professional, more resistant to pressure, or requires flow calculation. It is also necessary to select a gas phase photocatalytic reaction device newly developed by Xi'an Depai. The reactor is made of stainless steel, can withstand a certain pressure, and is equipped with a flow meter, which can clearly calculate the reaction gas volume, but the price of this equipment is high. So the purchase is not too much. If a larger pressure reactor is needed, due to material limitations, there is no finished product on the market, and it is still in the research and development stage.
Second, the problem of the amount of reaction. At present, there are about three stages of differentiation in domestic photocatalytic devices (this differentiation is only suitable for liquids to participate in the reaction), and the number of reactions is less than 150ml. The market is based on the Xi'an Depai eight-tube Vx-type configuration, and there are some other domestic The manufacturer has a 12-tube reactor, which is slightly different in configuration. There is little difference in functional effects. The second one is the reaction amount of 150-2000ml. This model is represented by the IIx type of Xi'an Depai. Only one experimental sample can be made at a time, but the functions such as real-time sampling and temperature measurement can be easily realized. The third is the large-capacity reaction of more than 2L. It is currently made on the market. Most of the orders are in the exploration stage, and the products are not mature enough.
Third, the choice of light source. There are now three types of light sources on the market: xenon lamps, mercury lamps and metal halide lamps. Laboratory teachers can choose the type of lamp according to their own experimental needs. In addition, we must remind our customers that these lamps will be worn out during long-term placement, so it is not recommended to purchase a lot of storage at one time. The configuration of the optional filter required for a particular light source.
The above points are determined, and the instrument model configuration can be basically determined. If there are other details, you can discuss it separately.
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