Sustainable use of recycled soot (carbon black) for the cleaner production of value-added products: A compendium
Appala Naidu Uttaravalli, Srikanta Dinda, Vighneswara Rao Kakara, A. V. Raghavendra Rao, Tejaswini Daida, Bhanu Radhika Gidla
Abstract
Over the past few decades, the consumption of hydrocarbon fuel has increased drastically due to its versatile applications. Consequently, the emissions and accumulation of unburnt carbon material (soot) in the environment have also increased alarmingly due to the partial combustion of hydrocarbons. Proper collection and recycling of soot have become a serious global concern. In the present review, consideration has been paid to the sustainable use of recycled soot (carbon black), focusing on their process chemistry, process parameters, and methodologies. From the intensive literature search, it was observed that recycled soot material has a great potential to use in various fields. The recycled soot can be used as received or by following suitable treatment techniques, for various possible applications, such as in the preparation of composite materials, rubber, energy storage devices, adsorbents, paints, inks, etc. From the literature, it is found that the incorporation of soot in composites and rubber, enhanced the physico-chemical, mechanical, and thermal properties of the products. The recycled soot offered an efficient conductive material (electrode material) for the production of lithium-ion batteries after suitable treatment. The soot offered high-performance solar evaporation devices. It also offered efficient adsorbent materials for the treatment of air and water to remove various pollutants. Low-cost and value-added inks are also prepared with recycled soot.