Carbon black from waste tyre pyrolysis plant
Activated carbon black from pyrolytic char can be used for water purification and air purification, as well as in batteries and fuel cells. Pyrolytic char has a calorific value comparable to high-grade coal and may therefore be used as fuel either in pulverized or briquetted form. The application of pyrolytic char as low grade carbon black for the manufacturing of thermoplastics and a low cost adsorbents for the treatment of industrial effluents has also been suggested . The potential of the tyre carbon black product as possible adsorbents for various pollutants has be en assessed and found to be successful, thus stimul ating a huge research interest [16]. Active carbon can be used to adsorb phenols, basic dyes, metals, p -chlorophenols, butane and natural gas. The production, characterization and uses of carbon black as printing inks bases and recycled tyre fillers have been studied . To enhance th e commercial value of waste t yre pyrolytic carbon black and increase its potential application as activated carbon, further treatment such as chemical activation is required.
Carbon black from tyre pyrolysis plant
This allows both pyrolysis and activation to be integrated into a single, relativ ely lower temperature process in the absence of oxygen. Demineralization of carbon black with acid (sulphuric and hydrochloric acid) followed by activatio n at high temperature, normally 900 o C, in a furnace is common . Commercial activation of carbon black is usually conducted at temperatures above 800 o C in a mixture of steam and carbon dioxide. There is general agreement that steam is a more reactive agent than carbon dioxide Activation increases the surface area while decreasing the concentration of contaminants or non -carbon material. Table IV shows the characteristics of acid treated and activated carbon black . Steam -activated carbon black present greater capacities for the adsorption of small and medium size species such as phenol and methylene blue, while carbon dioxide -activated adsorb larger molecular size compounds such as textile dye Procion Red more effectively . Carbon black characteristics are influenced by the nature of activation and process temperature to a lesser extent 。
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