Production of high concentrated cellulosic ethanol by acetone/water oxidized pretreated beech wood

Table 2 Pulp composition and total solids, lignin, hemicellulose, and cellulose recoveries after AWO

Run no.	Exp. Cond.^a	Constituents in pulp (wt%)					Constituents recovery in solid pulp (wt%)
Run no.	Exp. Cond.^a	AIL	ASL	Total lignin	Cellulose	Hemicellulose	Total pulp	Lignin	Hemicel.	Cellulose
Beechwood^b		21.5	2.7	24.2	43.1	20.2
1	0, 0, 175, 2, 20	33.7	1.7	35.4	59.7	3.9	67.5	98.8	12.9	93.5
2	0, 8, 175, 2, 19	36.4	1.4	37.8	58.7	3.2	65.8	103.1	10.3	89.7
3	1:0, 0, 175, 2, 22	22.8	3.5	26.3	46.6	21.8	94.7	103.0	102.4	102.0
4	1:0, 4, 175, 2, 22	21.8	3.4	25.2	47.5	22.1	92.9	96.9	102.2	101.6
5	1:0, 9, 175, 2, 22	21.4	3.2	24.6	47.1	22.2	93.4	95.2	102.4	102.2
6	1:1, 0, 175, 2, 27	17.6	2.1	19.7	64.6	15.7	69.9	56.8	54.3	104.8
7	1:1, 10, 175, 2, 25	11.1	1.7	12.8	74.8	16.7	59.3	31.4	49.1	103.0
8	3:1, 10, 175, 2, 25	13.9	2.3	16.2	57.0	23.8	73.3	49.0	86.3	97.1
9	3:1, 23, 175, 2, 58	3.2	1.5	4.7	75.2	16.9	50.3	9.7	41.9	87.8
10	1:1, 25, 175, 2, 64	1.0	1.2	2.2	85.9	10.8	45.9	4.2	24.5	91.6
11	1:3, 25, 175, 2, 64	11.5	1.0	12.5	84.1	5.2	46.1	23.9	11.8	90.0
12	3:1, 29, 200, 1, 74	10.0	1.0	11.0	72.4	7.4	43.4	19.8	15.8	72.9
13	3:1, 31, 200, 0.5, 78	7.1	1.3	8.4	70.2	11.4	46.5	16.1	26.2	75.8
14	3:1, 55, 225, 0.5, 139	7.8	1.0	8.8	74.6	7.0	40.8	14.9	14.0	70.7
15	1:1, 10, 175, 2, 24	8.4	0.5	8.9	79.5	4.0	42.9	15.8	8.5	79.2
16	3:1, 10, 175, 2, 25	13.4	0.7	14.1	73.6	4.2	45.6	26.5	9.5	78.0

^aExperimental conditions are presented rounded for brevity in the following order: acetone/water (wt/wt) ratio, partial O₂ pressure at reaction T (atm), reaction T (°C), reaction time (h), pressure at reaction T (atm)
^bBeechwood also had extractives measured according to NREL of 11.23 wt%

ISSN: 2731-3654