醋酸钾对烟草热解产酚特性的影响

doi:10.3969/j.issn.1673-5854.2024.01.006

Abstract

Abstract:

In order to investigate the effect of CH₃COOK on the phenols production characteristics of waste tobacco pyrolysis and its influencing factors, the effect of different potassium salts on the generation of typical phenolic compounds from the pyrolysis of waste tobacco was investigated. The effect of CH₃COOK on the phenols production characteristics of biomasses pyrolysis with different protein, cellulose, and lignin contents was also analyzed. The results showed that at a loading amount of 5.00%, compared to the unloaded spent secondary tobacco, CH₃COOK could significantly reduce the phenol and catechol percentage and enhance the hydroquinone percentage in the tobacco pyrolysis products. Among them, phenol decreased by 45.63%, catechol decreased by 67.88%, and hydroquinone increased by 32.80%. CH₃COOK could decrease the proportion of phenol and catechol in the pyrolysis products of tobacco, mulberry leaf and ginkgo biloba with high protein content, and increase the percentage of phenol, catechol, and guaiacol produced by the pyrolysis of pine chips with low protein and high cellulosic lignin. The significant percentage of phenol, p-cresol, and catechol in the pyrolysis products of tobacco proteins was 19.99%, 3.08%, and 2.69%, respectively. After loading CH₃COOK, the proportions of phenol and p-cresol in pyrolysis products were reduced by 77.09% and 79.37%, respectively, and no catechol was detected. CH₃COOK mainly reduced the percentage of corresponding phenols in tobacco pyrolysis products by inhibiting the pyrolysis of proteins to produce phenol and catechol in tobacco.

Key words: potassium acetate, tobacco waste, pyrolysis, phenolic compounds, protein, main control factor

CLC Number:

TQ35
S216.2

Shuyuan BEI, Rongcheng WU, Hongliang LU, Dawei ZHAO, Pengfei LU. Effect of CH₃COOK on the Phenols Production Characteristics of Tobacco Pyrolysis[J]. Biomass Chemical Engineering, 2024, 58(1): 41-48.

Figures/Tables 8

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References 28

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样品 sample	工业分析proximate analysis/%			元素分析ultimate analysis/%
样品 sample	灰分 ash	挥发分 volatile	固定碳 fixed carbon	碳 carbon	氢 hydrogen	氮 nitrogen	硫 sulfur	氧 oxygen
废次烟草tobacco waste	12.78	70.83	16.39	44.76	6.61	2.42	0.46	32.97
桑叶mulberry leaves	12.06	79.29	8.62	48.02	7.20	2.05	0.38	30.28
银杏叶ginkgo leaf	10.77	80.76	8.47	47.37	6.58	2.03	0.44	32.81
松木屑pine sawdust	0.85	81.67	17.48	51.67	6.45	0.12	0.00	40.90

样品sample	蛋白质protein/%	木质素lignin/%	纤维素cellulose/%	半纤维素hemicellulose/%
废次烟草tobacco waste	12.40	3.75	11.00	2.85
桑叶mulberry leaves	12.10	10.50	11.60	5.37
银杏叶ginkgo leaf	12.80	12.70	11.50	3.67
松木屑pine sawdust	1.44	36.90	41.30	14.30

负载物 load	苯酚 phenol	邻甲酚 o-cresol	对甲酚 p-cresol	邻苯二酚 catechol	对苯二酚 hydroquinone	愈创木酚 guaiacol
无no	4.12	0.68	1.13	2.74	1.25	0.94
KHSO₄	4.79	—	1.71	1.60	1.48	0.84
KH₂PO₄	4.37	0.40	1.23	3.57	3.32	0.79
CH₃COOK	2.24	0.99	1.06	0.88	1.66	1.13
K₂CO₃	2.21	1.06	1.16	1.51	1.82	1.13
KOH	2.64	0.98	1.24	1.70	1.89	1.24

负载物 load	温度区间/℃ temperature range	苯酚/% phenol	邻甲酚/% o-cresol	对甲酚/% p-cresol	邻苯二酚/% catechol	对苯二酚/% hydroquinone	愈创木酚/% guaiacol
无no	< 230	0.10	—	—	—	—	0.68
	230~300	6.43	0.60	0.96	5.09	2.20	1.15
	>300~360	5.49	1.93	5.00	—	2.57	—
	>360~550	3.41	2.27	3.94	—	—	—
CH₃COOK	< 230	0.15	—	—	—	—	0.32
	230~300	3.95	1.01	0.68	3.61	4.41	1.85
	>300~360	3.04	1.52	3.08	—	0.98	—
	>360~550	1.79	2.64	2.78	—	—	—

负载量 loading	苯酚 phenol	邻甲酚 o-cresol	对甲酚 p-cresol	邻苯二酚 catechol	对苯二酚 hydroquinone	愈创木酚 guaiacol	巨豆三烯酮 megastigmat rienone	柠檬烯 limonene	叶绿醇 phytol
无no	4.12	0.68	1.13	2.74	1.25	0.94	0.49	3.36	3.01
2	3.05	0.59	0.91	2.35	3.15	0.9	0.55	2.01	2.64
5	2.24	0.99	1.06	0.88	1.66	1.13	0.64	3.37	2.97
7	2.51	1.06	1.19	0.36	1.74	1.29	0.58	3.32	2.99
10	2.69	1.01	1.04	0	1.74	1.38	0.57	3.31	2.66

Effect of CH₃COOK on the Phenols Production Characteristics of Tobacco Pyrolysis

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生物质 biomass	负载物 load	苯酚 phenol	邻甲酚 o-cresol	对甲酚 p-cresol	邻苯二酚 catechol	愈创木酚 guaiacol	4-甲基愈创木酚 4-methyl-guaiacol	4-乙基愈创木酚 4-ethyl-guaiacol	E-异丁香酚 E-isoeugenol
烟草 tobacco	无no	4.12	0.68	1.13	2.74	0.94	—	—	—
烟草 tobacco	CH₃COOK	2.24	0.99	1.06	0.88	1.13	—	—	—
桑叶 mulberry leaves	无no	4.01	0.57	2.03	0.85	0.78	—	—	—
桑叶 mulberry leaves	CH₃COOK	3.16	1.16	1.66	—	0.79	—	—	—
银杏叶 ginkgo leaf	无no	2.5	—	0.56	1.88	0.61	—	—	—
银杏叶 ginkgo leaf	CH₃COOK	1.98	0.15	0.34	—	0.88	—	—	—
松木屑 pine sawdust	无no	0.22	—	0.42	0.91	8.14	11.47	5.56	10.04
松木屑 pine sawdust	CH₃COOK	0.41	0.14	0.43	3.11	11.02	8.97	5.50	7.54

烟草组分 tobacco components	负载物 load	苯酚 phenol	邻甲酚 o-cresol	对甲酚 p-cresol	邻苯二酚 catechol	愈创木酚 guaiacol
烟草 tobacco	无no	4.12	0.68	1.13	2.74	0.94
烟草固渣 tobacco solid residue	无no	1.23	—	1.7	1.87	0.49
烟草固渣 tobacco solid residue	CH₃COOK	2.19	—	1.56	—	0.92
烟草粗蛋白质 tobacco crude protein	无no	19.99	0.24	3.08	2.69	0.95
烟草粗蛋白质 tobacco crude protein	CH₃COOK	4.58	0.88	0.78	—	1.68

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Effect of CH3COOK on the Phenols Production Characteristics of Tobacco Pyrolysis

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Effect of CH₃COOK on the Phenols Production Characteristics of Tobacco Pyrolysis