2. Experimental

#### 2.1. Selection of materials and biochar preparation

Coconut coir (CC) and ground nut shell (GNS) were selected as the representative agricultural waste biomass due to their high consumption potential in Jharkhand. The agricultural biomass was crushed to less than 5 mm and then dried at 105 3C for 24 h for pyrolysis study. These samples were air dried and undertaken for slow pyrolysis [14]. The pyrolysis was carried out at varying temperature (350, 550, 750 and 950C) for 1 hour, after attaining these temperatures on heating @ 5–15C/min.
