The Potential of Cellulosic Ethanol Production from Grasses in Thailand

Table 4

Comparison of the theoretical ethanol yield and ethanol produced from SSCF process of 11 types of grasses.

Rank	Theoretical ethanol yield (L/ha/year)
	Calculated from total cellulose and hemicellulose		Calculated from total reducing sugars after enzymatic hydrolysis		Ethanol yield from SSCF (L/ha/year)
1	Pangola	18,706.69	Pangola	12,654.31	Dwarf napier	2,720.56
2	Atratum	9,201.69	Purple guinea	6,717.88	Ratchaburi	1,330.06
3	Dwarf napier	8,889.88	Dwarf napier	6,331.31	Pangola	1,272.00
4	Purple guinea	8,818.50	Atratum	6,143.81	Napier	1,171.69
5	Ruzi	6,922.69	Ruzi	4,272.69	Sri Lanka	1,151.69
6	Prachuap Khiri Khan	4,576.81	Prachuap Khiri Khan	3,139.25	Atratum	1,071.19
7	Ratchaburi	4,297.88	Ratchaburi	3,033.75	Prachuap Khiri Khan	1,066.75
8	Napier	3,867.38	Bana	2,758.31	Bana	1,045.81
9	Bana	3,847.50	Napier	2,621.06	Ruzi	661.56
10	Sri Lanka	3,519.81	King napier	2,561.81	Purple guinea	536.44
11	King napier	3,517.00	Sri Lanka	2,557.00	King napier	489.81

The theoretical ethanol yield for fermenting is 0.511 g per g of hexose or pentose.