赤泥对玉米秸秆催化热解生物油的影响规律研究

doi:10.3969/j.issn.1673-5854.2020.03.003

Abstract

Abstract:

Corn stalk was pyrolyzed at 500 ℃ with red mud, which calcined under different temperature, to investigate the effect of red mud addition on the bio-oil composition. TG-DTG and XRD analysis of the calcined red mud indicated that the red mud dehydrated after being calcined under 600 ℃(RM600), and decomposed completely and sintered when it calcined at 1 000 ℃(RM1000). GC/MS analysis of the bio-oil implied that both the red mud dried at 105 ℃(RM) and that calcined at 600 ℃ substantially promoted the ketonization reactions of carboxylic acids. With the addition of RM and RM600, the carboxylic acids content in the bio-oil decreased, correspondingly the ketones content in the bio-oil increased. The acid-reducing effect of RM was wore obvious, as the mass ratio of corn stalk and RM was 1:5, the amount of acids in the bio-oil decreased to 0.90% from 23.85% which was obtained without red mud. In addition, RM and RM600 had a positive effect on the furans formation while suppressed the formation of sugars and aldehydes. However, the red mud calcined under 1 000 ℃ posed a little effects on the bio-oil composition due to the sintering.

Key words: red mud, corn straw, fast pyrolysis, bio-oil

CLC Number:

TQ35

Yiqing WANG,Lihong WANG,Andong ZHANG,Wentan TANG,Zhihe LI,Hongzhen CAI. Effect of Red Mud on Bio-oil from Catalytic Pyrolysis of Corn Straw[J]. Biomass Chemical Engineering, 2020, 54(3): 18-24.

Figures/Tables 7

Fig.1

Fig.2

Fig.3

Fig.4

Table 1

Main components of corn straw bio-oil without adding red mud"

类别class	化合物compound GC	含量GC content / %
苯并呋喃(1) benzofuran	2, 3-二氢苯并呋喃 2, 3-dihydro-benzofuran	3.31
醇类(3) alcohols	甲醇methyl alcohol	2.48
	环丁醇cyclobutanol	1.80
	3, 4-二氢香豆素-6-醇3, 4-dihydrocoumarin-6-ol	0.27
	小计total	4.55
酚类(9) phenols	苯酚phenol	1.06
	2-甲氧基苯酚2-methoxy-phenol	1.32
	3-甲基苯酚3-methyl-phenol	0.30
	麦芽酚maltol	0.72
	4-甲基苯酚4-methyl-phenol	0.29
	2-甲氧基-4-甲基苯酚2-methoxy-4-methyl-phenol	0.27
	4-乙基苯酚4-ethyl-phenol	0.41
	4-乙基-2-甲氧基苯酚4-ethyl-2-methoxy-phenol	0.34
	2, 6-二甲氧基苯酚2, 6-dimethoxy-phenol	1.49
	小计total	6.2022
呋喃类(7) furans	糠醛furfural	5.87
	2-呋喃甲醇2-furanmethanol	1.87
	2-乙基-5-甲基呋喃2-ethyl-5-methyl-furan	0.34
	5-甲基-2-呋喃甲醛5-methyl-2-furancarboxaldehyde	0.94
	四氢-2-甲基呋喃tetrahydro-2-methyl-furan	0.62
	2(5H)-呋喃酮2(5H)-furanone	1.01
	5-(羟甲基)-2-呋喃甲醛5-(hydroxymethyl)-2-Furancarboxaldehyde	2.19
	小计total	12.84
酮类(12) ketones	2, 3-丁二酮2, 3-butanedione	0.53
	3-戊酮3-pentanone	1.09
	1-羟基-2-丙酮1-hydroxy-2-propanone	8.75
	3-羟基-2-丁酮3-hydroxy-2-butanone	0.43
	1-羟基-2-丁酮1-hydroxy-2-butanone	3.32
	2-羟基-2-环戊烯-1-酮2-hydroxy-2-cyclopenten-1-one	1.62
	3-甲基-2-环戊烯-1-酮3-methyl-2-cyclopenten-1-one	0.36
	1-(乙酰氧基)-2-丙酮1-(acetyloxy)-2-propanone	1.45
	2-甲基-2-环戊烯-1-酮2-methyl-2-cyclopenten-1-one	0.45
	3-甲基-1, 2-环戊二酮3-methyl-1, 2-cyclopentanedione	1.50
	3-乙基-2-羟基-2-环戊烯-1-酮3-ethyl-2-hydroxy-2-cyclopenten-1-one	0.25
	1-(2-羟基-5-甲基苯基)-乙酮1-(2-hydroxy-5-methylphenyl)-ethanone	2.12
	小计total	21.87
酸类(2) acids	乙酸acetic acid	22.72
	丙酸propanoic acid	1.13
	小计total	23.85
糖类(2) sugars	1, 4 :3, 6-二氢-α-d-吡喃葡萄糖1, 4 :3, 6-dianhydro-α-d-glucopyranose	0.63
	左旋葡聚糖levoglucosan	2.04
	小计total	2.67
醛类(2) aldehydes	羟基乙醛hydroxy-acetaldehyde	3.96
	丁二醛butanedial	2.53
	小计total	6.49
酯类(1) esters	乙酸甲酯acetic acid methyl ester	1.23
其他 other compounds		16.99

Table 1

Table 2

Table 3

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类别class	GC含量GC content / %
类别class	RM	RM600	RM1000
苯并呋喃benzofuran	2.05	1.20	2.53
醇类alcohols	1.68	2.04	5.14
酚类phenols	5.91	7.10	6.07
呋喃类furans	26.54	21.76	12.79
酮类ketones	43.42	36.46	26.66
酸类acids	3.92	16.86	28.56
糖类sugars	—	0.41	0.71
醛类aldehydes	0.50	0.70	5.00
酯类esters	—	—	1.12
其他other compounds	15.98	13.46	11.41

类别class	GC含量GC content / %
类别class	1 :1	1 :2	1 :3	1 :4	1 :5
苯并呋喃benzofuran	1.89	1.95	2.05	1.95	1.63
醇类alcohols	1.56	1.66	1.68	1.20	1.08
酚类phenols	5.82	5.35	5.91	7.49	7.57
呋喃furans	16.62	23.50	26.54	28.63	32.17
酮类ketones	38.90	41.83	43.42	40.45	38.96
酸类acids	20.25	11.27	3.92	2.46	0.90
糖类ugars	0.52	—	—	—	—
醛类aldehydes	2.35	1.39	0.50	0.19	—
酯类esters	0.53	0.42	—	—	—
其他other compounds	11.56	12.64	15.98	17.63	17.69

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Effect of Red Mud on Bio-oil from Catalytic Pyrolysis of Corn Straw

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