小麦B淀粉浆超低酸水解及其动力学

doi:10.3969/j.issn.1673-5854.2024.02.003

Abstract

Abstract:

Wheat B starch slurry is the by-product of wheat processing, and its high value utilization can promote the development of wheat deep processing technology. According to the characteristics of wheat B starch slurry, an extremely low acid hydrolysis process was proposed in this study. The effects of extremely low acid concentration, hydrolysis temperature, and hydrolysis time on the dextrose equivalent(DE) values of saccharification were investigated, and the response surface methodology was then used to optimize the conditions of hydrolysis process. Under the optimum conditions of sulfuric acid concentration of 0.07%, hydrolysis temperature of 166℃ and hydrolysis time of 66 minutes, the DE value of B starch slurry saccharification reached 88.58%. Furthermore, the kinetics of extremely low acid hydrolysis of B starch slurry was established. The kinetics results showed that the hydrolysis process followed the first-order reaction kinetics model, and the activation energy and pre-exponential factor were 75.118 kJ/mol and 1.429×10⁷ min^-1, respectively.

Key words: B starch, extremely low acid, saccharification, kinetic

CLC Number:

TQ35
TS236

Huanhuan ZHANG, Ruinan YANG, Zhenli YAN, Zigao ZHAO, Chun CHANG. Hydrolysis and Kinetics of Wheat B Starch Slurry with Extremely Low Acid[J]. Biomass Chemical Engineering, 2024, 58(2): 22-30.

Figures/Tables 11

Fig.1

Table 1

Table 2

Fig.2

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

Table 3

Fig.8

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来源source	平方和sum of squares	自由度degree of freedom	均方mean square	F值F value	P值P value
模型model	7 074.81	9	786.09	537.2	< 0.000 1
X₁	881.16	1	881.16	602.17	< 0.000 1
X₂	13.24	1	13.24	9.04	0.019 7
X₃	110.48	1	110.48	75.5	< 0.000 1
X₁X₂	0.82	1	0.82	0.56	0.478 8
X₁X₃	181.85	1	181.85	124.27	0.001 1
X₂X₃	2 500	1	2 500	1 710	0.468 2
X₁²	4 947.29	1	4 947.29	3 380.88	< 0.000 1
X₂²	36.16	1	36.16	24.71	0.001 6
X₃²	612.44	1	612.44	418.53	< 0.000 1
残差residual	10.24	7	1.46	0.32	0.813 9
失拟项lack of fit	1.97	3	0.66
净误差pure error	8.28	4	2.07
总残差total	7 085.05	16

温度/℃ temp.	β=0		β=1		β=2
温度/℃ temp.	R²	k/(g·L^-1·min^-1)	R²	k/min^-1	R²	k/(g·L^-1·min)^-1
150	0.967 6	0.005 1±0.000 29	0.996 5	0.007 6±0.000 15	0.915 2	0.017 2±0.001 65
160	0.936 9	0.006 8±0.000 56	0.998 6	0.013 9±0.000 16	0.966 7	0.033 8±0.001 98
170	0.871 9	0.007 2±0.000 87	0.994 2	0.018 7±0.000 45	0.957 9	0.066 1±0.004 62

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Hydrolysis and Kinetics of Wheat B Starch Slurry with Extremely Low Acid

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Figures/Tables 11

References 31

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序号 No.	X₁ 水解温度/℃ temperature	X₂ 硫酸质量分数/% H₂SO₄ mass fraction	X₃ 水解时间/min time	Y DE值/% DE value
1	150	0.05	60	61.38
2	190	0.05	60	38.78
3	150	0.09	60	63.05
4	190	0.09	60	42.26
5	150	0.07	30	42.27
6	190	0.07	30	35.47
7	150	0.07	90	62.49
8	190	0.07	90	28.72
9	170	0.05	30	68.26
10	170	0.09	30	70.78
11	170	0.05	90	76.34
12	170	0.09	90	78.96
13	170	0.07	60	90.36
14	170	0.07	60	88.88
15	170	0.07	60	89.41
16	170	0.07	60	87.25
17	170	0.07	60	86.98