Examination of biomass material properties

Examination of biomass material properties is necessary before planning gasification.

(a) Element analysis

Carbon (C), hydrogen (H), oxygen (O), sulfur (S), nitrogen (N) and chlorine (Cl) are observed through element analysis (HCN coder etc.). Excessive sulfur and/or chlorine can cause corrosion of plant equipment. The abbreviated molecular formula CnHmOp can be determined by obtaining the mol ratios for carbon (C), hydrogen (H) and oxygen (O). For biomass consisting of grass and wood, n=1.2-1.5 and p=0.8-1.0 when m=2.

(b) Ash composition and fusion point

The ash softening point, fusion point and flow point are to be measured in both oxidizing and reducing atmospheres. Problems with plant equipment occur more easily when the fusion point temperature is low.

(c) Technical analysis

Technical analysis is to be performed on raw material biomass to determine surface moisture, inherent moisture, volatile matter content, fixed carbon content and ash content, as well as high and low calorific content. These material property values are essential for gasification analysis.