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Similarities: both biocatalysts and chemical catalysts are selective (specific) and efficient; After participating in each reaction, its nature and quantity do not change.

Differences: 1. Biocatalysts have higher efficiency catalytic ability; Its efficiency is 10 to the 7th power of 10 and 13 to the 13th power of general inorganic catalysts.

2. The working conditions of biocatalysts are mild.

1) The chemical reactions catalyzed by biological enzymes are generally carried out under relatively mild conditions.

2) The activity of the enzyme is highest at the optimal temperature and pH conditions. If the temperature and pH are high or low, the enzyme activity will be significantly reduced. In general, the optimal temperature of enzymes in animals is between 35 and 40; The optimal temperature of enzymes in plants is between 40 and 50; The optimal pH of enzymes in animals is mostly in between, but there are exceptions, such as pepsin's optimal pH; The optimal pH of enzymes in plants is mostly in between.

3) Too acid, too alkali or too high temperature will destroy the spatial structure of the enzyme and permanently inactivate the enzyme. At around 0, the activity of the enzyme is very low, but the spatial structure of the enzyme is stable, and the activity of the enzyme can be increased at the right temperature.

3. The activity of biocatalyst is adjustable and can be actively regulated by hormones in living organisms.

4. The catalytic properties of some biological enzymes are related to cofactors.

5. Most enzymes are proteins, so they will be destroyed by high temperatures, strong acids, strong bases, etc. Chemical catalysts, on the other hand, are not active and are usually only elemental or cationic elements of some transition metals, which are not easy to be poisoned by catalysts.

Similarities: both can reduce (or increase) the activation energy of chemical reactions. Differences: Biocatalysts require suitable temperature and other conditions, and the catalytic efficiency is higher.

The English word for catalyst is catalyst.

Bilingual example sentence: the invention relates to a selective hydrodesulfurization before the catalyst of a combined alumina base and a preparation method thereof

The present invention relates to a selective hydrodesulfurization catalyst based on combined alumina and preparation method thereof.

the researchers found the catalyst continued to kill bacteriaforupto 24 hours with no light source.

The researchers found that the catalyst could sterilize bacteria for up to 24 hours without light.

Summary. There are two aspects to it, differences and similarities.

There are two aspects to it, differences and similarities.

First of all, the similarities are: both biocatalysts and chemical catalysts have selectivity (specificity) and high efficiency. After participating in each reaction, the nature and quantity of its own worldly appeal does not change. The second difference is:

1. The biological hand return catalyst has higher efficiency catalytic ability; Its efficiency is 10 to the 7th power of 10 and 13 to the 13th power of general inorganic catalysts.

Characteristics of biocatalysts compared to chemical catalysts.

This has a more detailed introduction, oh, in the form of ppt.

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1 Pinyin 2 Annotations.

cuī huà jì

A substance that can change the rate of a chemical reaction while its own chemical composition and mass remain unchanged before and after the reaction is called a catalyst. The role that the catalyst plays in the reaction is called catalysis. Catalysts can increase or decrease the rate of chemical reactions.

It is called a positive catalyst that can increase the reaction rate, for example, V2O5 is used in the production of sulfuric acid by the contact method, and iron catalyst is used in the ammonia synthesis industry. Negative catalysts (or inhibitors) that reduce the reaction rate are called antioxidants in rubber and plastic products. The addition of n-propyl gallate to edible oils and fats can prevent rancidity, which is an example of a negative catalyst.

The catalyst can only change the rate of the reaction, and cannot make the reaction that could not be hidden in the first place be carried out. In reversible reactions, the catalyst can only shorten the time for the reaction to reach equilibrium, but cannot shift the chemical equilibrium. Catalysts are generally selective, and different chemical reactions should use different catalysts.

Different catalysts can be used for the same reactant, and different reactions can occur, so as to obtain different products. The catalyst has a certain activation temperature, and the activity of the catalyst is highest when used in this temperature range. The mechanism by which the catalyst can increase the reaction rate is mainly the formation of intermediate products, or the reaction occurs in the active center on the surface of the catalyst, thereby changing the reaction pathway and reducing the activation energy of the reaction.

The English word for catalyst is catalyst.

The English explanation of catalyst is:"catalyst"。"catalyst"Refers to a substance that accelerates the speed of a chemical reaction, but does not itself participate in the reaction. Catalysts can facilitate the broadening of chemical reactions by providing the active centers needed for the reaction or by reducing the energy barrier to the reaction.

This action is known as catalysis and can be used to control the speed and selectivity of chemical reactions to produce the desired product.

The word ** is Greek and originally meant "to decompose, to transform". In chemistry, a catalyst is a substance that accelerates a chemical reaction but does not participate in it itself. Catalysts can be used to control the speed of chemical reactions, as well as to increase the efficiency of reactions.

Catalysts are very important in industrial production and chemical experiments, because they can help speed up chemical reactions, thereby improving the production efficiency and success rate of experiments.

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A catalyst is defined as a substance that accelerates the rate of a chemical reaction without consuming it on its own, and is commonly used in fields such as industry, biology, and environmental science.

The following will introduce the classification, principle of action, application and future development of catalysts in detail.

1. Classification of catalysts

Depending on the type of catalytic reaction, catalysts can be divided into gas-phase catalysts and liquid-phase catalysts. According to the chemical properties of catalysts, catalysts can be divided into acid catalysts, basic catalysts, and bifunctional catalysts.

According to the morphology and structure of catalysts, catalysts can be divided into solid catalysts, liquid catalysts, and gas catalysts. Different types of catalysts have different catalytic effects, so the selection of catalysts needs to be considered comprehensively according to the type and requirements of the catalytic reaction.

Second, the principle of action of the catalyst

Catalysts can facilitate chemical reactions in a variety of ways. The most common way is to increase the rate of the chemical reaction, thereby lowering the energy threshold, so that reactions that would otherwise require very high temperatures or pressures to reach the reaction conditions can proceed under milder conditions in the presence of a catalyst.

In addition, catalysts can also change the chemistry of reactants, promote the formation and breaking of specific bonds during chemical reactions, and improve the selectivity of reaction products.

3. Application of catalysts

Catalysts are widely used in automobile exhaust purification, petrochemical industry, organic synthesis, environmental protection, etc. For example, in automobile exhaust purification, the use of catalysts can convert a variety of harmful substances into harmless substances, making the exhaust gases emitted more environmentally friendly.

In the petrochemical industry, the use of catalysts can speed up the petroleum cracking process, increase yields and reduce costs. Catalysts also play an important role in organic synthesis, accelerating reaction rates, increasing yields, and controlling the structure and stereochemistry of reaction products.

Fourth, the future development of catalysts

With the continuous development of science and technology, the field of catalysts is also constantly upgrading. At present, researchers are exploring new catalysts, including nanoscale catalysts, metal-organic backbone catalysts, photocatalysts, etc.

These new catalysts have the advantages of high catalytic activity, good stability, strong selectivity, and low reaction temperature, and can better meet the needs of a variety of chemical reactions.

In the future, the development direction of catalysts mainly includes how to improve the catalytic efficiency of catalysts, increase the selectivity of catalysts, control the rate and direction of catalytic reactions, and reduce catalyst consumption.

In conclusion, catalyst is a key substance widely used in various chemical reactions, and has important application value in the fields of industry, biology and environmental science. With the continuous development of science and technology, the application prospects of catalysts will become more and more broad, and there is still a huge space for development in the future.