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

is a detailed technical description of carbon black and silica, two critical materials used in physical adsorption testing. Carbon black (CB), including both black and white varieties, plays a significant role in surface area and pore structure analysis. For carbon black, the specific surface area (STSA) is calculated using the t-plot thickness layer correction method, which usually yields values slightly lower or close to the BET surface area. This standard was established in 2003 with GB/T 10722-2003, setting guidelines for measuring total and external surface areas. Silica, also known as white carbon black, is produced through either a gas-phase or precipitation process. It finds extensive applications in silicone rubber, paints, tire manufacturing, toothpaste, and even emerging fields like energy storage. Recently, highly dispersible silica has gained popularity in the development of "green tires," where it improves performance and reduces rolling resistance. Conventional silica typically has a median particle size of around 10 microns, while advanced versions can be as small as 5–6 microns, offering better dispersion and performance. The 3H-2000PS series static capacity ratio surface porosity analyzer from Bestech Instruments (Beijing) Co., Ltd. is designed for precise measurement of silica's specific surface area and pore volume. It achieves a relative pressure point above 0.997, providing detailed pore size distribution, pore volume, and surface area data. The equipment is cost-effective and user-friendly, making it ideal for research and industrial applications. Bethed Instrument Technology (Beijing) Co., Ltd. is a leading manufacturer of nitrogen adsorption surface area analyzers. Established as one of the first companies in this field, it has developed ten technical patents and holds the most patented technology in China’s industry. The company focuses on improving instrument accuracy and stability through continuous innovation. In 2012, Bethed was selected by the Ministry of Science and Technology as a technology-based SME for its R&D efforts, receiving special funding to develop next-generation instruments. With over a decade of experience, the company has served hundreds of institutions, including universities, research centers, and major enterprises. It maintains an ISO9001-certified system and offers comprehensive sales, training, and after-sales support. The professional team at Bethed integrates international design concepts, advanced valve and pipeline systems, and modular assembly to ensure high vacuum and stability. Their products match or exceed imported high-end equipment in performance. A dedicated service network covers Beijing, Shanghai, and Guangzhou, offering 24-hour phone support and 48-hour on-site service, ensuring uninterrupted operation of customer equipment.

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