Bio-Briquettes From Processed Cashew Nut Shell Waste

Abstract

Cashew nut shells (CNS) are the primary waste produced during the processing of cashew nuts and need constant attention to handle or valorize these wastes effectively. As a result, these CNS wastes are processed into solid briquettes citing their significant calorific content, thus making them a promising renewable biofuel for combustion-based applications. In most cases, these wastes are pre-treated either through de-oiling or carbonizing prior to compaction, thus removing the harmful hydrocarbons present in them in form of CNS liquids. Presently, this chapter focuses on summarising various data related to these CNS wastes and their briquettes in terms of their availability, chemical characteristics, pre-treatment, processing technique, and fuel and combustion properties as reported in various works of literature. Moreover, all the reported results and data included in this present study were in accordance with the international testing standards and ranged in between their permissible range.