Optimization of Corn Stalk Liquefaction Conditions Under Atmospheric Pressure and Analysis of Biofuel

Yan ZHANG; Hui-le WANG; Hui-fang ZHAO; Jing LI; Xin TONG; Zhong LIU

doi:10.3964/j.issn.1000-0593(2022)08-2551-06

Spectroscopy and Spectral Analysis, Volume. 42, Issue 8, 2551(2022)

Optimization of Corn Stalk Liquefaction Conditions Under Atmospheric Pressure and Analysis of Biofuel

Yan ZHANG^1、*, Hui-le WANG^1、1;, Hui-fang ZHAO^1、1;, Jing LI^1、1;, Xin TONG^1、1;, and Zhong LIU^2、2;

¹1. Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Zhejiang University of Science and Technology, Hangzhou 310023, China

²2. Tianjin Key Lab of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China

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Figures & Tables(10)

Fig. 1. TG and DTG curves of corn stalk biofuel

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Fig. 2. GC-MS total ion chromatogram of biofuel

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Fig. 3. ¹H-NMR spectra of the biofuel

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Fig. 4. ¹³C-NMR spectra of the biofuel

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Table 1. Effect of reaction temperature on liquefaction yield
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Table 1. Effect of reaction temperature on liquefaction yield
液化温度/℃ 液化得率/% 液化温度/℃ 液化得率/%
140 75.65±0.44 170 98.57±0.53
150 86.35±0.65 180 94.12±0.81
160 95.00±0.38 190 92.72±0.36

Table 2. Effect of mixing ratio of liquefying agent on liquefaction yield
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Table 2. Effect of mixing ratio of liquefying agent on liquefaction yield
DEG-PG
混合比例液化得率/% DEG-PG
混合比例液化得率/%
15:1 97.48±0.38 1:1 98.86±0.32
9:1 98.19±0.22 1:2 99.40±0.12
6:1 98.57±0.51 1:4 98.72±0.38
4:1 98.63±0.50 1:6 98.52±0.54
2:1 98.82±0.23

Table 3. Effect of liquid solid ratio on the yield of liquefaction
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Table 3. Effect of liquid solid ratio on the yield of liquefaction
液固比液化得率/% 液固比液化得率/%
1:1 43.92±0.69 7:1 99.10±0.32
3:1 97.74±0.32 9:1 98.69±0.65
5:1 99.37±0.44

Table 4. Effect of catalyst dosage on the liquefaction yield
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Table 4. Effect of catalyst dosage on the liquefaction yield
H₃PO₄
用量/% 液化得率/% H₃PO₄
用量/% 液化得率/%
2 67.28±0.53 10 99.38±0.27
4 83.04±0.43 12 99.25±0.37
6 98.90±0.64 16 99.21±0.18
8 99.15±0.37

Table 5. Effect of reaction time on liquefaction yield
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Table 5. Effect of reaction time on liquefaction yield
反应时间
/min 液化得率/% 反应时间
/min 液化得率/%
15 97.75±0.25 60 99.25±0.31
30 98.84±0.42 75 98.78±0.16
45 99.50±0.28 90 98.73±0.59

Table 6. Comparison of main chemical components of biofuel

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Table 6. Comparison of main chemical components of biofuel

类别	化合物名称	分子式	相对含量/%
醇类	2,4-己二烯-1,6-二醇	C₆H₁₀O₂	0.08
	1,5-己二烯-3-醇	C₆H₁₀O	0.04
	EG	C₂H₆O₂	3.20
	PG	C₃H₈O₂	10.64
	1-环戊基乙醇	C₇H₁₄O	0.03
	DEG	C₄H₁₀O₃	30.61
	三乙二醇	C₆H₁₄O₄	0.46
	2,3-丁二醇	C₄H₁₀O₂	0.61
	3-(2-羟基-乙氧基)-丙醇	C₅H₁₂O₃	1.69
	2-丁醇	C₄H₁₀O	2.74
	3,7-二氧杂-1,9-壬二醇	C₇H₁₆O₄	1.66
	1,2-十六烷二醇	C₁₆H₃₄O₂	0.75
	14-甲基-1,2-十五烷二醇	C₁₆H₃₄O₂	0.62
	十六醇	C₁₆H₃₄O	0.09
	1-戊烯-4-醇	C₅H₁₀O₃	0.36
	3-辛烯-2-醇	C₈H₁₆O	0.06
	2-{2-[2-(2-羟基-乙氧基)-乙氧基]-乙氧基}-乙醇	C₈H₁₈O₅	1.38
	3-[2-(2-羟基-乙氧基)-乙氧基]-丙醇	C₇H₁₆O₄	3.04
	2-[2-(2-{2-[2-(2-{2-[2-(2-羟基-乙氧基)-乙氧基]-乙氧基}-乙氧基)- 乙氧基]-乙氧基}-乙氧基)-乙氧基]-乙醇	C₁₈H₃₈O₁₀	9.00
	2-(2-{2-[2-(2-羟基-乙氧基)-乙氧基]-乙氧基}-乙氧基)-乙醇	C₁₀H₂₂O₆	3.65
有机酸类	乳酸	C₃H₆O₃	0.08
	乙醇酸	C₂H₄O₃	0.05
	乙酰丙酸	C₅H₈O₃	1.21
	2,6-二羟基苯甲酸	C₇H₆O₄	0.16
	正缬氨酸	C₅H₁₁NO₂	0.04
	2-羟基戊酸	C₅H₁₀O₃	0.05
	十五酸	C₁₅H₃₀O₂	0.37
	2-甲基-5-氧-四氢呋喃-2-羧酸	C₆H₈O₄	0.16
	4-乙酰氧基丁酸	C₆H₁₀O₄	0.70
醚类	乙二醇单乙醚	C₄H₁₀O₂	0.02
	乙二醇单丁醚	C₆H₁₄O₂	0.03
	二乙二醇甲醚	C₅H₁₂O₃	0.03
	二乙二醇单乙醚	C₆H₁₄O₃	0.12
	二乙二醇丁醚	C₈H₁₈O₃	0.44
酯类	2-羟基-十六烷酸甲酯	C₂₁H₄₂O₃	0.07
	3,4,5-三羟基-苯甲酸乙酯	C₉H₁₀O₅	0.03
酚类	2-叔丁基-6-甲酚	C₁₁H₁₆O	0.39
	4-[1-(4-甲氧基苯基)-1-甲基-乙基]-苯酚	C₁₆H₁₈O₂	25.24
酮类	1-(2,6-二羟苯基)-乙酮	C₈H₈O₃	0.13

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Yan ZHANG, Hui-le WANG, Hui-fang ZHAO, Jing LI, Xin TONG, Zhong LIU. Optimization of Corn Stalk Liquefaction Conditions Under Atmospheric Pressure and Analysis of Biofuel[J]. Spectroscopy and Spectral Analysis, 2022, 42(8): 2551

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