Water Treatment Energy-saving Catalysts

Ozone oxidation catalytic technology is an efficient deep treatment method for wastewater and has become a hot topic in the field of sewage treatment in recent years. Compared to ozone used as a standalone oxidant, ozone in the presence of a catalyst forms hydroxyl radicals (·OH) that react with organic compounds at a higher rate and with stronger oxidation, allowing for the oxidation of almost all organic substances. The catalyst utilizes the strong oxidative properties of ozone to directly oxidize organic compounds in water into CO₂ and H₂O, or to decompose large organic molecules into smaller ones, making them easier to degrade.

This series of catalysts is a multi-component catalytic oxidation catalyst developed to address the challenges of difficult-to-degrade and poorly biodegradable organic wastewater. It has obtained a national invention patent as a new type of micro-electrolysis catalyst in China. It is produced by combining multi-metal alloy catalysts using high-temperature microporous activation technology and belongs to the new type of dosing, non-caking micro-electrolysis catalysts. When applied to wastewater, it efficiently removes COD, reduces color, improves biodegradability, and ensures stable and long-lasting treatment effects, while also preventing issues such as catalyst passivation and caking during operation

The new type of micro-electrolysis filler (iron-carbon filler) is sintered at a high temperature of around 1300°C. It features an integrated iron-carbon structure, fused catalyst, microporous framework alloy structure, large specific surface area, high activity, and high current density. It can efficiently remove COD, reduce color, and improve biodegradability, providing stable and long-lasting treatment effects while preventing issues such as filler passivation and caking during operation. Compared to modified iron particles used in steel pelletization available on the market, this product’s treatment efficiency is more than doubled.

In a heterogeneous Fenton system, metal catalysts fixed on a solid phase surface are used instead of the traditional Fe²⁺ in Fenton reactions to activate H₂O₂ and generate hydroxyl radicals (·OH) for pollutant removal. High-valent metals at the solid-liquid interface are reduced to low-valent states by H₂O₂, enabling the recycling of the catalyst and ensuring the continuous progress of the reaction (see equations 1-3).

≡Mn+ + H2O2 → ≡M(n+1)+ +·OH + OH－  （1）
≡M(n+1)+ +H2O2 → ≡Mn+ + H2O·+ H+    （2）
H2O·+ ≡M(n+1)→ ≡Mn+ + H+ + O2           （3）

Compared to traditional Fenton reactions, heterogeneous Fenton technology significantly broadens the applicable pH range, avoids the production of iron sludge, and allows for the reuse of the catalyst.

High-entropy alloys have attracted the attention of materials researchers due to their unique "four effects"—high-entropy effect, lattice distortion effect, sluggish diffusion effect, and "cocktail" effect. Compared to traditional catalytic materials composed of 2 or 3 metal elements, high-entropy alloys not only exhibit superior physical, chemical, surface, and electromagnetic properties but also offer higher catalytic stability. By adjusting the content of each element according to the catalytic performance requirements, high-performance catalytic alloy materials can be achieved.

Diamonds offer numerous advantages, including high hardness, high thermal conductivity, high stability, corrosion resistance, and good biocompatibility. 

BDD (Boron-Doped Diamond) electrode plates have significant advantages in the field of electrochemistry, such as a wide potential window, low background current, and high electrochemical stability. They are widely recognized as one of the most promising and excellent electrode materials in electrochemistry.

Titanium anodes, formally known as titanium-based mixed metal oxide (MMO) coated anodes, are also referred to as DSA (Dimensionally Stable Anode) anodes. They are made with titanium as the base material (in forms such as wires, rods, tubes, plates, or meshes), and a precious metal coating is applied to the titanium substrate. This coating endows the anode with excellent electrocatalytic activity, electrical conductivity, and resistance to oxidation.

The company offers a diverse product range and serves a wide array of fields. Major products include:

1. Ruthenium-based titanium metal oxide anodes
2. Iridium-based titanium metal oxide anodes
3. Platinum-based titanium precious metal-coated anodes
4. Complete electrochemical equipment

These products have been successfully applied in various industries such as:

Chloralkali production
Chlorate/perchlorate production
Electrolytic extraction of non-ferrous metals
Hypochlorite generators
Electroplating
Electrodialysis
Organic electrolysis
Cathodic protection
Organic wastewater treatment

"This catalytic oxidation technology, as a type of Fenton-like process, operates under the same conditions as conventional Fenton processes. However, it replaces the ferrous sulfate used in traditional Fenton reactions with nano-sized catalysts (LAT-NMF). This approach not only reduces the amount of iron introduced into the water treatment system and decreases the volume of solid waste but also minimizes the introduction of sulfate ions, thus reducing the increase in salt content.

The catalyst product developed by your company is based on the nano-sized LAT-NMF catalyst system. It offers advantages such as high density and easy separation, strong catalytic effects, and high catalytic efficiency, which significantly enhance the utilization of hydrogen peroxide. Additionally, because it uses a smaller amount of catalyst compared to conventional Fenton processes, it greatly reduces solid waste production. This makes it a high-efficiency, low-secondary-product, and environmentally friendly advanced oxidation technology."