**2. Biomass components**

The organic constituents in agricultural biomass have a recalcitrant structured cell wall which is called "lignocellulose" [21]. It is evident that the three components cellulose, lignin and hemicellulose are primery components as shown in the (**Figure 2** and **Table 1**). The highest composition is of cellulose in plant cell wall, whereas the

**Figure 2.**

*An overview of the general components of plant biomasses.*


#### **Table 1.**

*Biomass main components and their percent value.*

second copolymer is hemicellulose and the third one is aromatic protective polymer is of lignin. The components are discussed in the details separatly.
