China is not only a big consumer of rubber, but also a big producer of tires. With the rapid development of the automobile industry, China produces about 100 million waste tires each year. In addition, the import volume of used tires has increased in recent years, which has brought about increasingly severe recycling and environmental problems. As domestic fuel prices have risen, the huge profit margins have led to the repeated prohibition of the use of waste tires for land-based tires, which has caused serious environmental pollution.
In response to the increasingly serious problem of waste tire recycling, the Guangzhou Institute of Energy Research of the Chinese Academy of Sciences combines decompression pyrolysis with catalytic technology to produce high concentrations of limonene from pyrolysis of waste tires at lower temperatures and in shorter time. The fuel products; obviously improve the quality of pyrolytic carbon black, ultrafine powder obtained by crushing and air-sucking of carbon black can be directly used as a reinforcing carbon black or ink industry, and coarse powder can be widely used through activated pores to prepare high surface area activated carbon. In the treatment of wastewater and waste gas; Distilled extraction of enriched lemon olein product can be used as a good solvent, can be used in detergents, coatings, solvents and pharmaceuticals.
The technical innovations mainly include three: processing 1 ton of waste tires to prepare a concentration of 90% of lemon olein 45-50 kilograms; pyrolytic carbon black ultrafine powder to achieve commercial reinforcement carbon black and ink carbon black standards; pyrolysis The specific surface area of ​​activated carbon prepared by carbon black coarse powder activated by pore formation reached 600m2/g. At present, the application of this technology to produce fuel products in short supply, carbon black products are also applied in the footwear industry, product performance exceeds the relevant standards, with the promotion and application conditions. At present, the Guangzhou Energy Research Institute is planning to build a demonstration unit that will handle 10,000 tons of waste tires annually.
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