基于PY-GC/MS技术板栗壳快速热裂解特性的研究

doi:10.3969/j.issn.1673-5854.2020.02.005

Abstract

Abstract:

In order to investigate the fast pyrolysis characteristics of chestnut shells, single-stage and two-stage fast pyrolysis were carried out by pyrolysis-gas chromatography/mass spectrometry(Py-GC/MS), and the pyrolysis products were qualitatively and quantitatively analyzed. The results showed that during single-stage fast pyrolysis the total number of product species and yield increased with the pyrolysis temperature. In the two-stage fast pyrolysis, the temperature of the first stage had little effect on the total product yield, but a higher temperature gave more product species. The main components of the pyrolysis products were nitrogenous, sugars or acids, of which D-allose and acetic acid were the highest. With the single-stage fast pyrolysis temperature of 500 ℃ the content of D-allose could go up to 17%. For the two-stage pyrolysis, when the first-step and second-step temperatures were 450 ℃ and 600 ℃, respectively, the content of acetic acid could go up to 15.9%.

Key words: biomass, D-allose, acetic acid, pyrolysis, Py-GC/MS

CLC Number:

TQ35

Ping HUANG,Liangliang JIA,Jian LI,Dongbing LI. Characteristics of Fast Pyrolysis of Chestnut Shell Based on PY-GC/MS Technology[J]. Biomass Chemical Engineering, 2020, 54(2): 27-32.

Figures/Tables 5

Table 1

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Table 5

References 21

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相对产率relative yield/%	单级single-stage pyrolysis/℃				双级two-stage pyrolysis/℃
相对产率relative yield/%	450	500	550	600	350~600	450~600
总产物total products	100.0	114.5	114.8	131.5	101.3	97.8
含氮类nitrogen-containing	20.2	16.5	13.1	15.5	10.3	16.0
糖类carbohydrates	16.5	23.2	25.1	26.4	21.6	12.4
酸类acids	16.2	16.6	15.2	17.0	14.9	19.7
酚类phenols	9.4	10.1	10.5	13.2	8.5	12.1
酮类ketones	9.4	6.3	10.8	12.7	6.6	4.5
苯类benzenes	6.8	8.1	9.9	9.9	7.5	4.1
烷烃类alkanes	4.7	4.6	8.0	8.7	10.3	7.2
酯类esters	3.5	4.3	3.7	3.3	3.8	3.5
其他other	13.5	24.8	18.6	24.9	17.9	18.3

产物substance	单级热裂解/% relative content of single-stage pyrolysis				双级热裂解/% relative content of two-stage pyrolysis
产物substance	450 ℃	500 ℃	550 ℃	600 ℃	350~600 ℃	450~600 ℃
含氮类nitrogen-containing	20.2	14.4	11.4	11.8	10.2	16.4
糖类carbohydrates	16.5	20.3	21.9	20.0	21.3	12.7
酸类acids	16.2	14.5	13.3	12.9	14.7	20.1
酚类phenols	9.4	8.8	9.1	10.1	8.4	12.3
酮类ketones	9.4	5.5	9.4	9.6	6.5	4.6
苯类benzenes	6.8	7.1	8.6	7.5	7.4	4.2
烷烃类alkanes	4.7	4.0	7.0	6.6	10.2	7.4
酯类esters	3.5	3.8	3.2	2.5	3.8	3.6
其他others	13.5	21.7	16.2	18.9	17.6	18.8

产物 substance	单级热裂解产率/%relative content of single-stage pyrolysis						双级热裂解产率/% relative content of two-stage pyrolysis
产物 substance	450 ℃	500 ℃	550 ℃	600 ℃	平均average		350~600 ℃	450~600 ℃	平均average
醋酸acetic acid	13.9	11.4	11.1	9.2	11.4			9.4	15.9	12.6
D-阿洛糖D-allose	11.7	17.0	16.5	16.8	15.5	14.5		7.9	11.2
1, 2, 3-三甲氧基-5-甲基苯 1, 2, 3-trimethoxy-5-methyl-benzene	7.1	5.5	5.3	4.4	5.6	5.4		2.2	3.8
糠醛furfural	5.7	5.2	5.6	5.3	5.5	4.0		6.7	5.3
甘氨酰-DL-苏氨酸 N-glycyl- DL-threonine	5.5	5.5	5.6	5.6	5.5	5.3		6.4	5.8

产物substance	350~600 ℃		450~600 ℃
产物substance	第一级first-step	第二级second-step	第一级first step	第二级second step
醋酸acetic acid	1.7	98.3	100.0	0
D-阿洛糖D-Allose	0	100.0	67.8	32.2
1, 2, 3-三甲氧基-5-甲基苯 1, 2, 3-trimethoxy-5-methyl-benzene	0	100.0	100.0	0
糠醛furfural	0	100.0	100.0	0
甘氨酰-DL-苏氨酸N-glycyl-DL-threonine	0	100.0	100.0	0

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Characteristics of Fast Pyrolysis of Chestnut Shell Based on PY-GC/MS Technology

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References 21

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产物 substance	单级热裂解single-stage pyrolysis				双级热裂解two-stage pyrolysis
产物 substance	450 ℃	500 ℃	550 ℃	600 ℃	350~600 ℃	450~600 ℃
含氮类nitrogen-containing	18	16	17	23	24	32
糖类carbohydrates	9	7	8	9	9	9
酸类acids	10	16	13	22	24	28
酚类phenols	7	6	7	8	6	10
酮类ketones	14	10	15	12	11	10
苯类benzenes	5	10	8	9	9	14
烷烃类alkanes	14	22	27	26	45	34
酯类esters	17	20	20	18	15	18
其他others	41	49	47	53	57	66
总数total	134	156	163	180	199	221