In the rapid development of the automotive industry, abandoned tires have become one of the largest sources of solid waste at the present time, causing serious environmental problems, and its resource treatment has attracted widespread attention from countries around the world. At the Tianjin Ziya circular economy high-level forum held recently, Liu Shuangxi, a member of the National Expert Committee on Strategic Alliance for Renewable Resources Industry Technology Innovation and a professor at the School of Chemistry at Nankai University, said that his ongoing research project on high value of waste tyre pyrolysis products It shows that after proper non-hydrogenation desulfurization treatment, pyrolysis products of waste tyres, pyrolysis oil, can meet the requirements of urban fuel regulations and be used as municipal fuel ; activation of pyrolytic carbon black, another pyrolysis product After processing, it can produce high-absorbent activated carbon and commercial carbon black, which has great development prospects and a broad sales market.
Liu Shuangxi said that pyrolytic carbon black is a key product of thermal cracking of waste tires, and its yield is about 35% of the weight of waste tires. There are more impurities and the structure is lower. The research group removed oil and The ash-removing purification and modification process can obtain high-purity commercial carbon black. At present, commercial carbon black is mainly derived from petroleum products. Today, with the global resource shortage and increasingly serious environmental pollution, the use of waste tire pyrolytic carbon black in place of high-cost raw material oil to produce carbon black can not only solve environmental problems caused by waste tires, but also realize Full use of renewable resources, but also can ease the tension in the carbon black market and save fossil resources.
However, activated carbon can be prepared after pyrolytic carbon black of waste tires is activated. The research results of the research group showed that the waste tire activated carbon can be obtained by performing a series of treatments including thermal treatment under an inert atmosphere, steam activation, microwave activation, and chemical activation treatment on waste tire pyrolytic carbon black. As an excellent adsorbent for treating dye wastewater, it can also be used as a catalyst carrier for the dehydrogenation of organic liquid hydrogen carriers and the photocatalytic degradation of wastewater reactions. This not only expands the application of pyrolytic carbon black, but also enables waste treatment. , With good economic and environmental benefits.
In addition, pyrolysis oil, another major product of pyrolysis of waste tires, which accounts for approximately 45% of the mass of waste tires, contains more than a dozen sulfur compounds. Excessive sulfur content not only has a strong corrosive effect on the equipment, but also has severe effects on the human body. harm. In view of this shortcoming of pyrolysis oil, the research team used a suitable non-hydrogenation desulfurization technology to desulphurize it. The experimental results show that after treatment, the sulfur content in the pyrolysis oil can be reduced to about 0.2%. The requirements of the city’s fuel specifications allow it to be used as a city fuel.
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