烟草废弃物流化床热解转化实验研究

doi:10.3969/j.issn.0253-2417.2022.06.007

Abstract

Abstract:

In order to probe the high-value utilization of tobacco waste, the basic physicochemical properties of the feedstock as well as their thermal conversion characteristics were tested using TG, and Py-GC/MS, etc. Then, the pyrolysis experiment of tobacco waste was carried out in a fluidized bed reactor with a feeding rate of 10 kg/h. The results showed that tobacco waste had a very low bulk density and high porosity. The mass loss during tobacco pyrolysis was mainly occurred in the temperature range of 150-400 ℃, and the maximum rate of weight loss occurred near 180 and 315 ℃. The Py-GC/MS analysis of tobacco waste suggested that the bio-oil was mainly composed of nicotine, olefins, ketones, acids, aldehydes, alcohols, aromatics, phenols, pyridines and pyrroles. According to the pyrolysis experiment in the fluidized bed reactor, with the increase of pyrolysis temperature from 300 to 500 ℃, the yield of bio-oil reached its maximum of 32.58% at 450 ℃. The dominant compound in bio-oil was nicotine, followed by acids, ketones, phenols, and N-heterocyclic compounds. In addition, the gas yield increased gradually with the increasing temperature, which was mainly composed of CO₂ and CO, while the yield of solid char residue decreased.

Key words: tobacco waste, fluidized bed reactor, pyrolysis, bio-oil, high-value utilization

CLC Number:

TQ35

Jian JIANG, Anfu HU, Jun WANG, Guojun ZHOU, Yunchao LI, Kaige WANG, Shurong WANG. Experimental Study of Tobacco Waste Pyrolysis in a Fluidized Bed Reactor[J]. Chemistry and Industry of Forest Products, 2022, 42(6): 47-54.

Figures/Tables 9

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References 25

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温度/℃ temp.	烟碱/% nicotine	烯烃/% olefin	酮类/% ketone	醛类/% aldehyde	酸类/% acid	醇类/% alcohol	酯类/% ester	芳香烃/% aromatic hydrocarbon	酚类/% phenols	吡啶/吡咯类/% pyridine/ pyrrole	CO₂/%
350	32.5	4.0	13.5	11.9	7.7	11.1	2.6	0	4.0	0	2.3
450	26.7	9.0	13.1	13.9	9.6	7.5	3.4	0	4.2	1.5	3.3
550	14.1	20.4	11.8	10.3	4.8	2.7	6.8	2.1	3.5	3.0	7.8
650	5.2	28.6	9.9	9.3	2.6	1.2	4.7	7.7	4.6	5.1	15.1

样品samples	工业分析proximate analysis(ad.)/%				元素分析ultimate analysis(daf.)/%
样品samples	含水率 moisture(M)	灰分 ash(A)	挥发分 volatile(V)	固定碳 fixed carbon(FC)	C	H	N	S	O^*
一级旋风炭 first class cyclone char	10.13	22.21	32.63	35.03	67.02	3.13	2.99	0.90	25.96
二级旋风炭 second class cyclone char	10.52	22.3	32.12	35.06	66.94	3.26	2.10	3.13	24.57

保留时间/min retention time	化合物名称 compounds name	相对峰面积/% relative peak areas
22.064	1-甲基-2-(3-吡啶基)吡咯烷(尼古丁)nicotine	33.53
8.870	柠檬烯limonene	9.39
38.821	正十六烷酸palmitic acid	6.52
37.242	新植二烯neophytadiene	5.83
40.699	9, 12, 15-十八碳三烯酸9, 12, 15-octadecatrienoic acid	3.78
43.025	己二酸二辛酯dioctyl adipate	2.99
7.213	苯酚phenol	2.81
8.778	3-甲基-1, 2-环戊二酮3-methyl-1, 2-cyclopentanedione	2.54
19.319	对苯二酚hydroquinone	1.85
10.675	对甲酚p-cresol	1.82
27.669	烟碱nicotine	1.81
23.764	4-乙基儿茶酚4-ethyl catechol	1.76
5.090	甲基环戊烯醇酮methylcyclopentanol ketone	1.35
9.862	2-甲基-苯酚2-methylphenol	1.35
38.373	十六烷酸甲酯cetane acid methyl ester	1.31
47.253	3-乙基-5-(2-乙基丁基)-十八烷3-ethyl-5-(2-ethylbutyl)-octadecane	1.31
40.902	十八酸octadecanoic acid	1.30
6.741	3-甲基-2, 4, 10-三氧杂三环癸烷3-methyl-2, 4, 10-trioxatricyclodecane	1.25
6.688	甲基环戊烯醇酮methylcyclopentanol ketone	1.16
12.380	乙基环戊烯醇酮ethyl cyclopentenol ketone	1.14
8.610	对薄荷烯p-menthene	1.06
4.271	对二甲苯paraxylene	1.03
9.226	2, 3-二甲基-2-环戊烯-1-酮2, 3-dimethyl-2-cyclopentene-1-one	1.01

工况reaction condition¹⁾	H₂/%	CO₂/%	CH₄/%	CO/%
COS处理前before COS treatment	0.027	3.387	0.115	0.768
COS处理前before COS treatment*	0.640	78.820	2.680	17.860
COS处理后after COS treatment	0.000	4.138	0.013	0.000
COS处理后after COS treatment*	0.000	99.690	0.310	0.000

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Experimental Study of Tobacco Waste Pyrolysis in a Fluidized Bed Reactor

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