坝上地区莜麦秸秆热解特性研究

收稿日期:2022-07-06。

基金项目:(2023KJ218);(19ZXBTSN00220)。

作者简介:(1970-),,,,。

E-mail:**********************.cn 通信作者:(1990-),,,,。

E-mail:*****************
坝上地区莜麦秸秆热解特性研究
刘联胜1,2,梁小虎1,2,王冬计3,张晓宇1,2,黄亚龙3
(1.,300401;2.,
300401;3.,300384)摘要:,,,N 2,CO 2,O 2,AKTS 。

:(30~140℃)、(140~370℃)、(370~900℃)3;,;,,;15%O 2-5%CO 2-80%N 2(2),,139.86kJ/mol。

关键词:;;;中图分类号:TK6;S216.2文献标志码:A 文章编号:1671-5292(2024)03-0293-07
引言,10t [1],50%[2],,,[3]。

,,,[4]。

[5][6],,,、、,。

,[7]N 2,,,。

N 2,CO 2,O 2,,,,。

Kartal Furkan [8],
Flynn-Wall-Ozawa(FWO)[9]。

,,。

、,1400m ,[10],,,,[11]。

,,FWO ,。

1方法
1.1原料特性
,、、80,105℃,。

,1。

可再生能源
Renewable Energy Resources
第42卷第3期2024年3月
Vol.42No.3Mar.2024
:H,O,S 、,C,N ,C ,O ;、,,,、,。

,。

1.2
实验设备
PerkinElmer STA-6000TG-DSC 。

(1)、15%O 2-5%CO 2-80%N 2(2)、10%O 2-10%CO 2-80%N 2(3)、5%O 2-15%CO 2-80%N 2(4),4。

1。

1.3实验方法
1,0.2MPa,19.8mL/min,,STA-6000,11
mg ,1/2~2/3。

,10,20,30℃/min 40℃/min 4。

,30~900
℃。

,,4,2、3、4,,。

ASCII ,AKTS-Thermokinetics TG ,DTG ,。

1.4动力学分析方法
FWO 。

FWO ,、,,,。

Vyazovkin 、Coats-Redfern ,,。

FWO :
X =m 0
-m m 0
(1)d X
d t
=k (T )f (X )P n O 2
(2)k (T )=k 0exp -E
RT
(
)
(3):X ;m 0m ,mg;T ,℃;f (X );P O 2
,Pa;n P O 2
;k 0;E ,kJ/mol。

P O 2
,P n
O 2
,k 0′
=
k 0P n
O 2
,(2)d X d t =k 0P n O 2
f (X )exp -E RT ()=k 0′f (X )exp -E RT
(
)
(4),(4)表1元素分析与工业分析结果
Table 1Results of elemental analysis and industrial analysis
[12][13]
C
48.4240.1045.26
H
5.545.09
6.31
O
42.9140.9347.51
N
1.330.441.04
S
0.070.000.14
M
7.38
11.235.09
V
75.0566.7466.77A
6.30
13.4410.72
FC
11.278.59
16.78/%
/%
图1实验系统示意图
Fig.1Experimental system diagram
STA-6000
可再生能源
2024,42(3)
d X d T β=k 0′f (X )exp -E RT ()
(5)
:β,℃/min。

(5):
In d X d t ()
=In k 0′f (X )[]-E
RT f (6)
:T f X ,℃。

(6):
X 0
∫
d X f (X )=k 0
′
β
T f 0
∫
exp -
E
RT
(
)
d T =k 0′
E βR ∞y
f
∫
exp(-y )
y 2d y
(7)
:y=E /(RT );y f =E /(RT f )。

:
p (y )=∞
y
f
∫
exp(-y )
y 2d y
(8)(8)p (y )≅
exp(-Ay+B )
y d
(9):A ,B ,d 。

In βT d f
=-A E RT +C 1
(10)
:C 1。

p (y )p (y )≅exp(-1.0518y-5.330)(11):
In β=-1.0518E
RT f
+C 2(12)
:C 2。

(12),1/T f ,In β,,k E k =-1.0518
E R
(13)
2实验结果2.1
不同气氛下热解特性
24DTG 。

DTG ,,3:30~140℃,,,,;140~370℃,,、图2不同升温速率下4种气体氛围的DTG 曲线
Fig.2DTG curves of four flue gas atmospheres at different heating rates
1234
30140
370
0200
400600800
1000
0.0
-0.2
-0.4-0.6-0.8-1.0-1.2
/℃
(a)10℃/min
1234
30140
370
0200
4006008001000
0.0
-0.5-1.0-1.5
-2.0
-2.5
/℃
(b)20℃/min
1234
30140370
0200
4006008001000
0.0
-0.5-1.0-1.5-2.0-2.5-3.0-3.5-4.0
/℃
(c)30℃/min 1234
30
140
370
0200
4006008001000
0.5
0.0
-0.5-1.0-1.5-2.0-2.5-3.0-3.5-4.0
/℃
(d)40℃/min
刘联胜袁等
坝上地区莜麦秸秆热解特性研究
,,;370~900℃,,,。

,。

,475℃,,,。

1,,,。

,。

,4,,300℃,。

,,10℃/min 1<2<4<3,20℃/min 3<2<1<4。

,(),。

,,。

,,。

,,,。

,,,,。

,,,,。

2.2低升温速率下热解特性。

3,4。

,,图3不同气体氛围下4种升温速率的反应进程和反应速率曲线
Fig.3Reaction process and reaction rate curves of four heating rates in different gas atmospheres
(b)2
(a)1
10℃/min
20℃/min 30℃/min
40℃/min 0
200
400600800
10001.00.80.6
0.40.20.0
/℃
R =0.9876
0.008
0.007
0.0060.005
0.0040.0030.0020.0010.000
10℃/min 20℃/min 30℃/min 40℃/min
200
4006008001000
1.00.80.60.40.20.0
/℃
R =0.9574
0.008
0.0070.0060.0050.0040.0030.0020.0010.000
(d)4
10℃/min 20℃/min 30℃/min
40℃/min 0
200
4006008001000
1.00.80.60.40.20.0
/℃
R =0.9574
0.008
0.007
0.0060.0050.004
0.0030.0020.0010.000(c)310℃/min
20℃/min 30℃/min
40℃/min 0
200
4006008001000
1.00.80.60.40.20.0
/℃
R =0.92340.008
0.007
0.006
0.0050.004
0.003
0.0020.0010.000可再生能源
2024,42(3)
,,,,,AKTS 。

,,。

,4,,。

,,。

,,。

,;,,,,。

,,,,,。

,20℃/min 。

2.3不同气氛下活化能
4。

12,,0.5,,0.65,0.7,21,12。

34,,0.6,,43。

,,,。

12,,。

,80kJ/mol,,。

4162.44,139.86,164.09,164.55
kJ/mol,,,2。

3讨论
,,3(-、-、-),。

,。

3.1不同地区生物质秸秆热解
,,5[7]、、[14]、[12]TG 。

64DTG ,,、、N 2,15%O 2-5%CO 2-80%N 2(2),20℃/min。

,,130~500℃,图5不同地区生物质秸秆的TG 曲线
Fig.5TG curves of biomass straw in different regions
0100200
300400500600700
/℃
100806040200
图4不同气体氛围下活化能曲线Fig.4Activation energy curves of different flue
gas atmospheres
1234
0.0
0.2
0.40.60.8
1.0
400
3002001000
刘联胜袁等坝上地区莜麦秸秆热解特性研究
140~370℃,205~385℃,250~400℃。

,,,,。

3.2较快升温速率热解特性模拟
5~40℃/min,。

,AKTS 2,,7。

:;,4,;,,,。

4结论,,FWO ,。

①43,30~140℃,;140~370℃,,、、;370~900℃,。

②,,,。

③,,,,,20℃/min。

④4,15%O 2-5%CO 2-80%N 2(2),139.86kJ/mol。

参考文献院[1],,,.[J].,
2019,35(22):132-140.[2],,,.[J].,
2019,40(9):1-11.[3],,,.[J].,2020,38(7):867-873.[4]
,.2020[EB/
OL].https:///zhengce/zhengceku/2020-04/20/content_5504504.htm,2020-04-20.[5],,,.[J].,2021,55
(3):397-403.[6],,.[J].,2019,48(2):52-53.
[7],,.[J].,2021,42(11):410-414.
[8]
Kartal Furkan,Özveren Uĝur.Novel multistage kinetic
models for biomass pyrolysis and CO 2gasification by
means of reaction pathways [J].Bioresource Technology
图7较快升温速率模拟曲线
Fig.7Simulation curve of faster heating rate
0100200300400500600700800900
/℃
1.00.90.80.70.60.50.40.30.20.10.0-0.1
60℃/min 80℃/min 100℃/min 120℃/min
0.02250.02000.01750.01500.01250.01000.00750.00500.00250.0000-0.0025
图6不同地区生物质秸秆的DTG 曲线
Fig.6DTG curves of biomass straw in different regions
0100200
300400500600
700
/℃
0-5
-10-15-20
可再生能源
2024,42(3)
Pyrolysis characteristics of naked oats straw in Bashang area
Liu Liansheng 1,2,Liang Xiaohu 1,2,Wang Dongji 3,Zhang Xiaoyu 1,2,Huang Yalong 3
(1.School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China;2.Key Laboratory of Thermal Science and Clean Energy Utilization Technology of Hebei Province,Tianjin 300401,China;3.School of Energy and Safety Engineering,Tianjin Chengjian University,Tianjin 300384,China)
Abstract :In order to achieve high efficiency and clean combustion of crop straw in Bashang area,typical naked oats straw was selected as the research object to analyze the pyrolysis characteristics.The pyrolysis atmosphere environment in the combustion process was created by simulating flue gas with mixed gases.The thermogravimetric analyzer was used to study the thermogravimetric characteristics and the influence of temperature rise rate on the mixed gas atmosphere composed of air and N 2,CO 2,and O 2in different proportions.The AKTS software was used for kinetic analysis.The results showed that:the pyrolysis process of naked oats straw was divided into three stages,which were drying stages (30~140℃),volatilization stages (140~370℃),carbonization stages (370~900℃).Gas atmosphere mainly affected the pyrolysis of carbonization stage,drying and volatilization stage had little effect,heating rate affects volatilization and carbonization stage,the faster the heating rate,the greater the reaction rate.When the pyrolysis atmosphere was 15%O 2-5%CO 2-80%N 2mixed gas (gas 2),the activation energy required for pyrolysis process was the least,and the average activation energy was 139.86kJ/mol.The results provided a certain theoretical basis for the energy utilization of biomass straw in the alpine Bashang area.Keywords :Bashang area;naked oats straw;pyrolysis characteristics;activation energy
刘联胜袁等
坝上地区莜麦秸秆热解特性研究
Reports,2021,15:100804.
[9]
Liu bustion of coal chars in O 2/CO 2and O 2/N 2mixtures:A comparative study with non -isothermal thermogravimetric Analyzer (TGA)Tests [J].Energy &Fuels,2009,23(9):4278-4285.[10].[J].,2022(3):97-98.[11].[D].:,2019.9-10.[12],,,.[J].,2021,39(12):1570-1575.[13],,,.[J].,2020,38(9):1149-1156.[14],,,.[J].,2021,39(2):156-161.。