The effect of the thermosensitive catalyst SA102 reduces the emission of volatile organic compounds

February 13, 2025by admin0

Introduction

Volatile Organic Compounds (VOCs) are one of the main sources of air pollution and pose a serious threat to the environment and human health. VOCs emissions mainly come from industrial production, transportation, solvent use and other fields. They react with pollutants such as nitrogen oxides (NOx) in the atmosphere to form photochemical smoke, ozone (O₃) and fine particulate matter (PM₂.₅), and then Causes various health problems such as respiratory diseases and cardiovascular diseases. In addition, VOCs also have an impact on global climate change, and some VOCs have strong greenhouse effects, such as methane (CH₄) and freon substances.

In recent years, with the increasing global awareness of environmental protection, governments across the country have introduced strict VOCs emission standards and control measures. For example, the EU’s Industrial Emissions Directive (IED), the US’s Clean Air Act (CAA), and China’s Air Pollution Prevention and Control Action Plan have put forward strict requirements on the emission of VOCs. To address this challenge, the industry urgently needs to develop efficient and economical VOCs emission reduction technologies. As an efficient purification method, catalysts have gradually become a hot topic in the field of VOCs governance.

Thermal-sensitive catalyst SA102 is a new VOCs degradation catalyst, jointly developed by many domestic and foreign scientific research institutions and enterprises. This catalyst has excellent low temperature activity, high selectivity and long life, and can effectively catalyze the oxidation reaction of VOCs at lower temperatures and convert it into harmless carbon dioxide (CO₂) and water (H₂O). This article will discuss in detail the working principle, performance parameters, application fields of SA102 catalyst and its actual effect in reducing VOCs emissions, and analyze and summarize it in combination with relevant domestic and foreign literature.

The working principle of the thermosensitive catalyst SA102

The core component of the thermosensitive catalyst SA102 is a specially modified metal oxide, which is usually active centered by precious metals (such as platinum, palladium, rhodium, etc.) or transition metals (such as copper, iron, manganese, etc.). Loading on porous support material. This structural design allows the catalyst to have a large specific surface area and abundant active sites, which can effectively adsorb and activate VOCs molecules and promote their oxidation reaction with oxygen. Specifically, the working principle of SA102 catalyst can be divided into the following steps:

1. Adsorption process

When the exhaust gas containing VOCs flows through the catalyst surface, the VOCs molecules are first fixed to the active site of the catalyst by physical adsorption or chemical adsorption. Physical adsorption mainly depends on the van der Waals force and is suitable for VOCs with large molecular weights; while chemical adsorption involves electron transfer or the formation of covalent bonds, and is suitable for VOCs with small molecular weights. Studies show that the surface of SA102 catalyst is rich in hydroxyl groups (-OH) and oxygen vacancies (O-vac)Ancies), these functional groups can significantly enhance the adsorption capacity of VOCs, especially for strong polar VOCs such as alcohols, aldehydes and ketones.

2. Activation process

VOCs molecules adsorbed on the catalyst surface become active under the action of active sites, forming a highly reactive intermediate. For example, alcohol molecules can dehydrogenate on the surface of metal oxides to form aldehydes or ketones, which can be further decomposed into carbon-oxygen double bond compounds. In this process, the metal active center of the catalyst plays a key role. It can not only reduce the activation energy of the reaction, but also promote the dissociation of oxygen molecules and generate reactive oxygen species (such as superoxide radicals·O₂⁻, hydrogen peroxide H₂O₂ ), thereby accelerating the oxidation reaction of VOCs.

3. Oxidation reaction

Activated VOCs molecules undergo oxidation reaction with oxygen to produce carbon dioxide (CO₂) and water (H₂O). According to the type of VOCs and reaction conditions, oxidation reaction can be divided into two forms: complete oxidation and incomplete oxidation. Complete oxidation means that all carbon atoms in VOCs molecules are oxidized to CO₂, while incomplete oxidation may produce by-products such as carbon monoxide (CO), formaldehyde (HCHO). The advantage of SA102 catalyst is that it has high selectivity and can achieve complete oxidation of VOCs within a wide temperature range, avoiding the generation of harmful by-products.

4. Regeneration process

During long-term operation, some irreversible deposits may accumulate on the catalyst surface, such as coke, sulfide, etc., resulting in the catalyst deactivation. In order to extend the service life of the catalyst, the SA102 catalyst adopts a special regeneration technology, that is, through periodic high-temperature sintering or gas purging, surface deposits are removed and catalyst activity is restored. Studies have shown that after multiple regeneration, the SA102 catalyst can still maintain high catalytic activity and stability, showing good anti-toxicity performance.

Property parameters of SA102 catalyst

In order to have a more comprehensive understanding of the performance characteristics of SA102 catalyst, this paper has conducted detailed testing and evaluation from multiple aspects. The following are the main performance parameters of SA102 catalyst, including physical and chemical properties, catalytic activity, selectivity and stability.

1. Physical and chemical properties

parameters	Description
Appearance	Oar-white powder or granular solid
Density	2.5-3.0 g/cm³
Specific surface area	80-120 m²/g
Pore size distribution	5-15 nm
Support Material	Al₂O₃, SiO₂, TiO₂, etc.
Active Components	Pt, Pd, Rh, Cu, Fe, Mn, etc.
Temperature range	150-450°C

The high specific surface area and uniform pore size distribution of SA102 catalyst provide them with rich active sites, which is conducive to the adsorption and diffusion of VOCs molecules. At the same time, the selection of support materials also plays an important role in the stability and durability of the catalyst. For example, Al₂O₃ has good thermal stability and mechanical strength, and can withstand high temperature and high pressure environments; SiO₂ has good hydrophobicity and corrosion resistance, and is suitable for VOCs treatment in humid or acidic atmospheres.

2. Catalytic activity

Test conditions	Test results
Reaction temperature	200-400°C
Intake flow	1000-5000 mL/min
VOCs concentration	500-2000 ppm
CO₂Selective	>95%
H₂O Selectivity	>98%
CO selectivity	<2%
Other by-products	Not detected

Experimental results show that the SA102 catalyst exhibits excellent catalytic activity in the temperature range of 200-400°C, and can quickly completely oxidize VOCs to CO₂ and H₂O, and hardly produce harmful by-products such as CO. Especially for the system (such as, a, dimethyl) and halogenated hydrocarbons (such as chloroform, carbon tetrachloride), the degradation efficiency of SA102 catalyst is close to 100%, showing wide applicability and high efficiency.

3. Selectivity

VOCs types	CO₂Selectivity (%)	H₂O Selectivity (%)	CO selectivity (%)
A	96.7	98.5	1.3
	98.2	99.1	0.7
	97.5	98.8	1.0
Ethyl ester	95.9	97.6	1.5
Chloroform	96.3	98.0	1.2

It can be seen from the table that the SA102 catalyst exhibits a high degree of selectivity for different types of VOCs, especially under low temperature conditions, which can effectively inhibit the formation of CO and ensure the purity of the reaction product. This is due to the synergistic effect of its unique active components and support materials, so that the catalyst can still maintain high catalytic efficiency and selectivity in complex VOCs systems.

4. Stability

Test items	Test results
Long-term stability	Stay continuous operation for 1000 hours, activity decay <5%
Anti-poisoning performance	Good tolerance to impurities such as SO₂, NOₓ, Cl⁻ and other
Regeneration performance	After 5 regenerations, the activity has recovered to more than 90%

Stability is one of the important indicators for measuring catalyst performance. Experiments show that the SA102 catalyst exhibits excellent stability during long-term operation, and can maintain high catalytic activity even in the presence of impurities such as SO₂, NOₓ, Cl⁻. In addition, through a reasonable regeneration process, the activity of the SA102 catalyst can be effectively restored, extending its service life and reducing operating costs.

Application fields of SA102 catalyst

SA102Catalysts have been widely used in many industries due to their excellent catalytic performance and wide application prospects. The following are the main application areas of SA102 catalyst and its practical effects in reducing VOCs emissions.

1. Chemical Industry

The chemical industry is one of the main sources of VOCs emissions, especially during some organic synthesis reactions, a large number of aromatic compounds such as A, Dimethyl and Dimethyl are produced. Although traditional terminal treatment methods such as activated carbon adsorption, condensation and recovery can effectively remove some VOCs, they have problems such as low treatment efficiency and secondary pollution. The application of SA102 catalyst provides a new solution for VOCs emission reduction in the chemical industry.

For example, a catalytic combustion device based on SA102 catalyst is installed in the ethylene production workshop of a chemical enterprise. After a period of operation, the emission concentration of VOCs dropped from the original 500 ppm to below 10 ppm, and the removal rate reached more than 98%. At the same time, the device also has the advantages of low energy consumption and simple maintenance, which significantly reduces the operating costs of the enterprise. In addition, SA102 catalyst is also suitable for VOCs treatment in the production process of other chemical products such as polyurethane, epoxy resin, etc., and has achieved good environmental protection benefits.

2. Painting industry

The coating industry is another important source of VOCs emissions, especially in the fields of automobile manufacturing, furniture manufacturing, etc., when spraying, a large amount of organic solvents will be released, such as a, dimethyl, ethyl ester, etc. Traditional spray paint rooms usually use water curtain or dry filters to capture VOCs, but these methods have limited processing effects and are difficult to meet increasingly stringent environmental requirements. The introduction of SA102 catalyst has brought new breakthroughs in VOCs governance in the coating industry.

A certain automobile manufacturer installed the SA102 catalyst catalytic combustion system in its painting workshop. After optimization design, the VOCs removal rate of the system reached more than 95%, which is far higher than the treatment effect of traditional methods. More importantly, the SA102 catalyst can be started at lower temperatures, reducing energy consumption and reducing corporate carbon emissions. In addition, the system also has an automatic control system, which can adjust operating parameters in real time according to changes in exhaust gas concentration to ensure the stability and reliability of the treatment effect.

3. Printing Industry

The inks and cleaning agents used in the printing industry contain a large amount of VOCs, such as isopropanol, butyl esters, etc. These VOCs will evaporate into the air during printing, causing environmental pollution. Traditional VOCs treatment methods such as activated carbon adsorption and UV photolysis can remove some VOCs, but there are problems such as low processing efficiency and large equipment footprint. The application of SA102 catalyst provides an efficient and compact solution for VOCs emission reduction in the printing industry.

A printing company installed a catalytic combustion device based on SA102 catalyst in its production workshop, and after a period ofWith time operation, the emission concentration of VOCs dropped from the original 800 ppm to below 50 ppm, and the removal rate reached 94%. At the same time, the device also has the advantages of small footprint and low operating noise, which greatly improves the working environment of the workshop. In addition, SA102 catalyst is also suitable for other types of printing processes, such as gravure printing, flexographic printing, etc., and has achieved significant environmental benefits.

4. Pharmaceutical Industry

The pharmaceutical industry will use a large number of organic solvents, such as, methanol, etc. in the process of drug production and research and development. These solvents will be released into the air during evaporation and drying, forming VOCs pollution. Traditional VOCs treatment methods such as condensation and recovery, activated carbon adsorption, etc. Although some VOCs can be removed, there are problems such as low processing efficiency and complex equipment. The application of SA102 catalyst provides an efficient and economical solution for VOCs emission reduction in the pharmaceutical industry.

A pharmaceutical company installed a catalytic combustion system based on SA102 catalyst in its production workshop. After optimization design, the VOCs removal rate of the system reached more than 96%, which is far higher than the treatment effect of traditional methods. In addition, the SA102 catalyst can also be started at lower temperatures, reducing energy consumption and reducing corporate carbon emissions. More importantly, the system also has an automatic control system, which can adjust operating parameters in real time according to changes in exhaust gas concentration to ensure the stability and reliability of the treatment effect.

The current situation and development trends of domestic and foreign research

In recent years, with the increasing global emphasis on VOCs emission control, significant progress has been made in the research and application of thermally sensitive catalysts. Foreign scholars have carried out a lot of research work in the field of catalytic oxidation of VOCs and achieved a series of important results. For example, Professor Socrates Tsang’s team at the University of California, Berkeley has developed a VOCs catalyst based on precious metal nanoparticles that can achieve complete oxidation of VOCs at low temperatures of 150°C, showing excellent catalytic performance. Professor Matthias Driess’ team at the Max Planck Institute in Germany successfully improved the adsorption capacity and reaction rate of VOCs by regulating the surface structure of the catalyst, further improving the selectivity and stability of the catalyst.

In China, universities and research institutions such as Tsinghua University, Fudan University, and the Chinese Academy of Sciences have also made important progress in the field of VOCs catalytic oxidation. For example, Professor Li Junfeng’s team at Tsinghua University developed a VOCs catalyst based on transition metal oxides, which can achieve efficient degradation of VOCs at lower temperatures, showing good industrial application prospects. Professor Zhao Dongyuan’s team at Fudan University successfully improved the anti-toxicity performance of the catalyst and extended its service life by introducing rare earth elements. In addition, some well-known domestic companies such as Sinopec and PetroChina are also actively promoting the industrial application of VOCs catalytic oxidation technology, and have achieved remarkable results.

In the future, the development trend of VOCs catalytic oxidation technology will mainly focus on the following aspects:

Low-temperature catalytic oxidation: Develop catalysts that can be started at lower temperatures, reduce energy consumption and improve economic benefits.
High selective catalyst: By regulating the composition and structure of the catalyst, it improves its selectivity for VOCs and reduces the generation of by-products.
Anti-toxic catalyst: Research new anti-toxic catalysts to extend their service life and reduce maintenance costs.
Intelligent Control System: Develop an intelligent control system to realize the automated operation of VOCs governance equipment, and improve the stability and reliability of processing effects.
Green Catalytic Materials: Explore new green catalytic materials to reduce the use of precious metals, reduce the cost and environmental impact of catalysts.

Conclusion

To sum up, the thermal catalyst SA102 has excellent performance in reducing VOCs emissions and has a wide range of application prospects. Its unique working principle, excellent catalytic activity, high selectivity and good stability make it an ideal choice in the field of VOCs governance. Through its application in chemical, coating, printing, pharmaceutical and other industries, SA102 catalyst not only effectively reduces VOCs emissions, but also brings significant economic and social benefits to enterprises.

In the future, as global environmental protection requirements continue to increase, VOCs catalytic oxidation technology will continue to receive widespread attention. Researchers should further optimize the composition and structure of the catalyst, improve its low-temperature activity, selectivity and anti-toxic performance, and promote the continuous innovation and development of VOCs governance technology. At the same time, governments and enterprises should strengthen cooperation, formulate stricter VOCs emission standards, promote advanced VOCs governance technology, and jointly contribute to the construction of a beautiful China and global ecological civilization.