From Rice Husk to Nano: The Circular Economy Password of White Carbon Black

In Yancheng, Jiangsu Province, a biomass energy company is converting agricultural waste into high value-added materials - rice husks. After being cracked at 1200 ℃, the generated gas is converted into gas-phase white carbon black with a purity of 99.5% and a particle size of only 15nm through a special catalyst. This technological breakthrough has increased the value of each ton of rice husks from 200 yuan to 20000 yuan, while reducing carbon dioxide emissions by 1.8 tons.


The traditional production of white carbon black relies on quartz sand and soda ash, which has high energy consumption and generates a large amount of waste residue. The biomass route uses rice husk and straw as raw materials, and through gasification reforming process, converts carbon elements into synthetic gas for power generation, while extracting silicon elements into white carbon black. In 2025, China will build the world's first 10000 ton biomass white carbon black production line. The product has passed the EU REACH certification and is used in Mercedes Benz automotive sealants and 3M's high-end coatings.


The more profound impact lies in industrial synergy. This technology has increased the comprehensive utilization rate of rice husks from 30% to 95%, driving farmers to increase their income by over 1 billion yuan per year. As experts from the Institute of Process Engineering, Chinese Academy of Sciences have said, "This is not only a materials revolution, but also a deep integration of agriculture and chemical industry