Application of BET specific surface area and total pore volume in the carbon black industry

Carbon black (CB), including carbon black and other forms, and white carbon black (silica, SiO₂) are widely used in the field of physical adsorption testing, such as specific surface area and pore structure analysis. In the carbon black industry, the surface area (STSA) is a critical parameter that is calculated using the t-plot thickness layer correction method. Typically, STSA values are slightly smaller or close to the BET specific surface area. The national standard GB/T 10722-2003 was issued in 2003, setting guidelines for measuring the total and external surface areas of carbon black. Silica, also known as white carbon black, is mainly divided into two types based on production methods: gas-phase silica and precipitated silica. It finds extensive applications in silicone rubber, paints, tire reinforcement, light-colored rubbers (such as shoes), toothpaste abrasives, and thickeners. Recently, it has also gained attention as an energy storage material in the emerging field of new energy technologies. The 3H-2000PS series static capacity ratio surface porosity analyzer from Bestech Instruments (Beijing) Co., Ltd. offers high repeatability in measuring BET specific surface area and total pore volume. It can reach a relative pressure point of P/P₀ above 0.997, providing detailed information on pore volume, pore area, and pore size distribution. This equipment is cost-effective and easy to operate. In recent years, highly dispersible white carbon black has seen rapid development, especially in the "green tires" sector. Traditional silica typically has a median particle size of around 10 microns, while high-dispersion silica has a median particle size of 5–6 microns. Advanced particle analyzers like the Mickey laser particle size analyzer from the U.S. can provide more detailed data on particle characteristics. Bethed Instrument Technology (Beijing) Co., Ltd. is one of the earliest companies specializing in research, development, production, and sales of nitrogen adsorption specific surface area instruments. Recognized by Beijing Zhongguancun Science and Technology Park as a high-tech enterprise, the company holds ten technical patents and is the leader in patented technology within its industry in China. With strong R&D capabilities, many of its patents focus on improving the accuracy and stability of instruments. In 2012, Bethed was selected by the Ministry of Science and Technology as a technology-based SME innovation fund recipient, enabling further investment in instrument development and launching a new generation of advanced products. The company has served hundreds of users, including universities, research institutes, and well-known enterprises, maintaining a leading position in the market for many years. In 2009, the company achieved ISO9001 certification and established a comprehensive sales, training, and service system. Its professional team ensures customers receive top-quality equipment and exceptional service. The R&D team has been working for over a year, integrating international design concepts, advanced valve and pipeline systems, full modular assembly, and high vacuum stability. These features make their instruments competitive with imported high-end models. With a professional after-sales service system, Bethed offers 24-hour phone support, 48-hour on-site service, and local agencies in Beijing, Shanghai, and Guangzhou, ensuring the smooth operation of user equipment.

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