... Plant Seed1.high yield 2.high contents of lignin and cellulose of their biomass 3.carbon ... raw material, the cell wall is rich in lignin, cellulose and hemicellulose, this is as essential ... reasons: first, they have high calorific value, the lignin in the carbon content is very high ( 64%); ... In addition, the biomass of perennial grasses, lignin and cellulose content was higher than annual plants. ...