Optimization of the dilute maleic acid pretreatment of wheat straw

Table 3 Xylose mass balance of maleic acid pretreatment of wheat straw.

Run	Pre-treatment time (min)	Pre-treatment temperature (°C)	Maleic acid concentration (mM)	Xylose monomers in aqueous (%)	Furfural in aqueous (%)	Xylose oligomers in aqueous (%)	Xylose in pressed material (%). Not corrected for a, b, and c	Xylose in pressed material (%). Corrected for a, b, and c	Total (%)
				a	b	c	d	e	a+b+c+e
1	10	130	11	0	0	2	18	18	20
2	50	130	89	44	1	22	25	19	86
5	50	170	11	5	3	47	31	26	81
6	10	170	89	85	7	1	15	6	100
7	10	170	11	1	1	26	37	34	61
8	50	170	89	72	18	1	11	4	94
9	10	130	89	15	0	35	26	21	72
11	50	130	11	1	0	11	31	30	42
14	30	130	50	7	0	35	27	23	65
15	50	150	50	66	3	11	24	16	96
16	10	150	50	36	1	32	26	19	87
17	30	150	89	78	4	5	20	12	99
18	30	150	11	2	0	11	32	30	43
19	30	170	50	75	10	4	17	9	98
c×6	30	150	50	58 (2.2)	2 (0.1)	17 (1.0)	24 (0.3)	17 (0.2)	94 (1.4)

c×6 = centre runs, six repeats. Average value given. Standard deviation between brackets. Percentages are expressed as xylose equivalents, as a fraction of total xylose equivalents present in untreated wheat straw.

ISSN: 2731-3654