化工学报 ›› 2020, Vol. 71 ›› Issue (2): 811-820.DOI: 10.11949/0438-1157.20191156
毛宁1,王强1,杨妍1,徐敦信2,冯炜1,张金鹏1,白红存1(),郭庆杰1
收稿日期:
2019-10-10
修回日期:
2019-11-08
出版日期:
2020-02-05
发布日期:
2020-02-05
通讯作者:
白红存
基金资助:
Ning MAO1,Qiang WANG1,Yan YANG1,Dunxin XU2,Wei FENG1,Jinpeng ZHANG1,Hongcun BAI1(),Qingjie GUO1
Received:
2019-10-10
Revised:
2019-11-08
Online:
2020-02-05
Published:
2020-02-05
Contact:
Hongcun BAI
摘要:
通过X射线光电子能谱和傅里叶红外光谱表征宁夏宁东庆华煤不同显微组分的官能团种类、表面结构元素价态分布及化学键赋存特征。采用热重-质谱联用考察庆华煤镜质组和惰质组在不同热解温度下的失重行为和关键气体组分变化。进一步基于Coats-Redfern模型从化学键断裂特征和反应动力学角度探讨煤镜质组和惰质组的热解行为差异。结果表明,庆华煤显微组分的热解失重峰与相应化学键断裂信息能够很好地吻合。不同显微组分的热重曲线变化趋同,但相同热解温度下镜质组的失重率始终高于惰质组。快速热解阶段镜质组较惰质组表现出更大的失重率和最大失重速率。其主要原因在于镜质组的脂肪族官能团相对含量更高,快速热解阶段会发生更多的Cal—Cal断裂。不同热解温度下庆华煤显微组分三个主要热解阶段的活化能和频率因子大小次序为:快速热解阶段>快速缩合阶段>缓慢热解阶段。在快速热解阶段,镜质组和惰质组的平均活化能均约为75 kJ/mol,但镜质组的频率因子更高。
中图分类号:
毛宁, 王强, 杨妍, 徐敦信, 冯炜, 张金鹏, 白红存, 郭庆杰. 基于显微组分化学键特征的宁夏庆华煤热解特性及动力学分析[J]. 化工学报, 2020, 71(2): 811-820.
Ning MAO, Qiang WANG, Yan YANG, Dunxin XU, Wei FENG, Jinpeng ZHANG, Hongcun BAI, Qingjie GUO. Pyrolysis characteristics and kinetics analysis of Qinghua coal, Ningxia based on chemical bonding characteristics of macerals[J]. CIESC Journal, 2020, 71(2): 811-820.
Sample | Proximate analysis/%(mass) | Petrographic analysis/%(vol) | ||||||
---|---|---|---|---|---|---|---|---|
Mad | Aad | Vdaf | FCad | Vitrinite | Inertinite | Exinite | Minerals | |
QH | 0.86 | 10.81 | 19.70 | 71.62 | 88.4 | 7.8 | 0 | 3.8 |
表1 煤样的工业分析和岩相分析
Table 1 Proximate and petrographic analyses of coal sample
Sample | Proximate analysis/%(mass) | Petrographic analysis/%(vol) | ||||||
---|---|---|---|---|---|---|---|---|
Mad | Aad | Vdaf | FCad | Vitrinite | Inertinite | Exinite | Minerals | |
QH | 0.86 | 10.81 | 19.70 | 71.62 | 88.4 | 7.8 | 0 | 3.8 |
Sample | Ultimate analysis/%(mass,daf) | ||||
---|---|---|---|---|---|
C | H | O | N | S | |
vitrinite | 86.62 | 5.25 | 5.47 | 1.59 | 1.07 |
inertinite | 86.24 | 5.02 | 6.49 | 1.37 | 0.88 |
表2 煤样的元素分析
Table 2 Ultimate analysis of coal samples
Sample | Ultimate analysis/%(mass,daf) | ||||
---|---|---|---|---|---|
C | H | O | N | S | |
vitrinite | 86.62 | 5.25 | 5.47 | 1.59 | 1.07 |
inertinite | 86.24 | 5.02 | 6.49 | 1.37 | 0.88 |
Peak | Possible origin | Peak temperature range/℃ | Bond energy range/(kJ/mol) |
---|---|---|---|
1,2 | release of bonded water and decomposition of carboxylic acid | <300 | <150 |
3 | breakage of bonds between Cal and O, S and N, and S—S | 300—420 | 150—230 |
4 | breakage of bonds between Cal and Cal, H, O and Car—N | 420—550 | 210—320 |
5 | breakage of bonds between Car and Cal, O and S decomposition of carbonates in coals to generate CO2 | 550—715 | 300—430 |
6 | condensation of aromatic rings to release H2 | 715—900 | >400 |
表3 DTG曲线中各子峰的化学键信息归属
Table 3 Chemical bond assignment of peaks from DTG profile
Peak | Possible origin | Peak temperature range/℃ | Bond energy range/(kJ/mol) |
---|---|---|---|
1,2 | release of bonded water and decomposition of carboxylic acid | <300 | <150 |
3 | breakage of bonds between Cal and O, S and N, and S—S | 300—420 | 150—230 |
4 | breakage of bonds between Cal and Cal, H, O and Car—N | 420—550 | 210—320 |
5 | breakage of bonds between Car and Cal, O and S decomposition of carbonates in coals to generate CO2 | 550—715 | 300—430 |
6 | condensation of aromatic rings to release H2 | 715—900 | >400 |
Sample | I1 | I2 | I3 | CH2/CH3 |
---|---|---|---|---|
vitrinite | 1.19 | 2.16 | 0.34 | 3.81 |
inertinite | 1.12 | 1.68 | 0.71 | 2.79 |
表4 煤样显微组分红外谱图的结构参数
Table 4 Structural parameters derived from FTIR of coal macerals
Sample | I1 | I2 | I3 | CH2/CH3 |
---|---|---|---|---|
vitrinite | 1.19 | 2.16 | 0.34 | 3.81 |
inertinite | 1.12 | 1.68 | 0.71 | 2.79 |
Sample | Relative content of carbon species/% | |||
---|---|---|---|---|
C—C/C—H | C—O | C | O | |
vitrinite | 76.58 | 13.85 | 5.67 | 3.90 |
inertinite | 75.87 | 12.10 | 6.18 | 5.85 |
表5 镜质组和惰质组C 1s组分的相对含量
Table 5 Fraction of C on vitrinite and inertinite
Sample | Relative content of carbon species/% | |||
---|---|---|---|---|
C—C/C—H | C—O | C | O | |
vitrinite | 76.58 | 13.85 | 5.67 | 3.90 |
inertinite | 75.87 | 12.10 | 6.18 | 5.85 |
Sample | Relative content of oxygen species/% | ||||
---|---|---|---|---|---|
Inorganic oxygen | C | C—O | O | Adsorbed oxygen | |
vitrinite | 1.25 | 13.35 | 74.07 | 8.64 | 2.69 |
inertinite | 1.35 | 17.66 | 61.92 | 15.12 | 3.95 |
表6 镜质组和惰质组O 1s组分的相对含量
Table 6 Fraction of O on vitrinite and inertinite
Sample | Relative content of oxygen species/% | ||||
---|---|---|---|---|---|
Inorganic oxygen | C | C—O | O | Adsorbed oxygen | |
vitrinite | 1.25 | 13.35 | 74.07 | 8.64 | 2.69 |
inertinite | 1.35 | 17.66 | 61.92 | 15.12 | 3.95 |
Td/℃ | T/℃ | E/(kJ/mol) | A/min-1 | R2 | |||
---|---|---|---|---|---|---|---|
Vitrinite | Inertinite | Vitrinite | Inertinite | Vitrinite | Inertinite | ||
750 | 180—420 | 17.26 | 10.97 | 3.37 | 2.88 | 0.9949 | 0.9886 |
420—550 | 79.78 | 83.91 | 16618.86 | 7761.03 | 0.9930 | 0.9893 | |
550—715 | 34.84 | 35.68 | 12.76 | 14.68 | 0.9868 | 0.9747 | |
800 | 180—420 | 11.89 | 15.26 | 4.17 | 3.86 | 0.9866 | 0.9808 |
420—550 | 72.10 | 77.60 | 17277.45 | 8800.29 | 0.9933 | 0.9932 | |
550—715 | 37.93 | 33.35 | 11.64 | 10.63 | 0.9979 | 0.9967 | |
850 | 180—420 | 18.25 | 15.70 | 3.74 | 4.64 | 0.9871 | 0.9911 |
420—550 | 73.43 | 74.07 | 18579.39 | 7999.22 | 0.9928 | 0.9857 | |
550—715 | 33.84 | 38.26 | 11.23 | 18.26 | 0.9969 | 0.9972 | |
900 | 180—420 | 13.63 | 13.82 | 6.01 | 3.86 | 0.9893 | 0.9970 |
420—550 | 76.01 | 76.98 | 16154.16 | 8386.05 | 0.9918 | 0.9843 | |
550—715 | 33.82 | 37.55 | 12.63 | 10.25 | 0.9936 | 0.9970 |
表7 在不同热解终温下煤样热解的动力学参数
Table 7 Pyrolysis kinetic parameters of coal samples under different final temperatures
Td/℃ | T/℃ | E/(kJ/mol) | A/min-1 | R2 | |||
---|---|---|---|---|---|---|---|
Vitrinite | Inertinite | Vitrinite | Inertinite | Vitrinite | Inertinite | ||
750 | 180—420 | 17.26 | 10.97 | 3.37 | 2.88 | 0.9949 | 0.9886 |
420—550 | 79.78 | 83.91 | 16618.86 | 7761.03 | 0.9930 | 0.9893 | |
550—715 | 34.84 | 35.68 | 12.76 | 14.68 | 0.9868 | 0.9747 | |
800 | 180—420 | 11.89 | 15.26 | 4.17 | 3.86 | 0.9866 | 0.9808 |
420—550 | 72.10 | 77.60 | 17277.45 | 8800.29 | 0.9933 | 0.9932 | |
550—715 | 37.93 | 33.35 | 11.64 | 10.63 | 0.9979 | 0.9967 | |
850 | 180—420 | 18.25 | 15.70 | 3.74 | 4.64 | 0.9871 | 0.9911 |
420—550 | 73.43 | 74.07 | 18579.39 | 7999.22 | 0.9928 | 0.9857 | |
550—715 | 33.84 | 38.26 | 11.23 | 18.26 | 0.9969 | 0.9972 | |
900 | 180—420 | 13.63 | 13.82 | 6.01 | 3.86 | 0.9893 | 0.9970 |
420—550 | 76.01 | 76.98 | 16154.16 | 8386.05 | 0.9918 | 0.9843 | |
550—715 | 33.82 | 37.55 | 12.63 | 10.25 | 0.9936 | 0.9970 |
1 | Li P, Zong Z M, Wei X Y, et al. Structural features of liquefaction residue from Shenmu-Fugu subbituminous coal[J]. Fuel, 2019, 242: 819-827. |
2 | 史航, 靳立军, 魏宝勇, 等. 大柳塔煤及显微组分在不同气氛下的热解行为[J]. 煤炭学报, 2019, 44(1): 316-322. |
Shi H, Jin L J, Wei B Y, et al. Pyrolysis behavior of Daliuta coal and its macerals under different atmospheres [J]. Journal of China Coal Society, 2019, 44(1): 316-322. | |
3 | 赵云鹏, 胡浩权, 靳立军, 等. 矿物质对不同还原程度煤显微组分半焦燃烧特性影响[J]. 化工学报, 2019, 70(8): 2946-2953. |
Zhao Y P, Hu H Q, Jin L J, et al. Effect of minerals on semi-coke combustion characteristics of maceral with different reducibility[J]. CIESC Journal, 2019, 70(8): 2946-2953. | |
4 | Roberts M J, Everson R C, Neomagus H W J P, et al. The characterisation of slow-heated inertinite- and vitrinite-rich coals from the South African coalfields[J]. Fuel, 2015, 158(5): 591-601. |
5 | Yang Q, Chang H, Du S, et al. Pyrolysis interaction between vitrinite and inertinite from Chinese Wucaiwan coal[J]. Journal of Fuel Chemistry and Technology, 2015, 24(4): 405-418. |
6 | Chang H, Deng H, Yang Q, et al. Interaction of vitrinite and inertinite of Bulianta coal in pyrolysis[J]. Fuel, 2017, 207(3): 643-649. |
7 | Wang S, Tang Y, Schobert H H, et al. FTIR and simultaneous TG/MS/FTIR study of Late Permian coals from Southern China[J]. Journal of Analytical and Applied Pyrolysis, 2013, 100(2): 75-80. |
8 | Das T K. Evolution characteristics of gases during pyrolysis of maceral concentrates of Russian coking coals[J]. Fuel, 2001, 80(4): 489-500. |
9 | Das T K. Thermogravimetric characterisation of maceral concentrates of Russian coking coals[J]. Fuel, 2001, 80(1): 97-106. |
10 | Wang J, Du J, Chang L, et al. Study on the structure and pyrolysis characteristics of Chinese western coals[J]. Fuel Processing Technology, 2010, 91(4): 430-433. |
11 | Sun Q, Li W, Li B Q. The synergistic effect between macerals during pyrolysis[J]. Fuel, 2002, 81(7): 973-974. |
12 | Sun Q, Li W, Chen H, et al. Thermogravimetric-mass spectrometric study of the pyrolysis behavior of Shenmu macerals under hydrogen and argon[J]. Energy Sources, Part A, 2006, 28(14): 1281-1294. |
13 | Sun Q, Li W, Chen H, et al. Devolatilization characteristics of Shenmu coal macerals and kinetic analysis[J]. Energy Sources, Part A, 2006, 28(9): 865-874. |
14 | Sun Q, Li W, Chen H. The synergistic effect between coal macerals during hydropyrolysis[J]. Energy Sources, 2007, 29(2): 125-132. |
15 | Zhao Y, Hu H, Jin L, et al. Pyrolysis behavior of vitrinite and inertinite from Chinese Pingshuo coal by TG–MS and in a fixed bed reactor[J]. Fuel Processing Technology, 2011, 92(4): 780-786. |
16 | 杨群, 常海洲, 杜帅, 等. 五彩湾煤镜质组与惰质组在热解中的相互作用[J]. 燃料化学学报, 2015, 43(11): 1295-1302. |
Yang Q, Chang H Z, Du S, et al. Pyrolysis interaction between vitrinite and inertinite from Chinese Wucaiwan coal[J]. Journal of Fuel Chemistry and Technology, 2015, 43(11): 1295-1302. | |
17 | Feng Z, Bai Z, Zheng H, et al. Study on the pyrolysis characteristic of mild liquefaction solid product of Hami coal and CO2 gasification of its char[J]. Fuel, 2019, 253: 1034-1041. |
18 | 冯炜, 高红凤, 王贵, 等. 枣泉煤分子模型构建及热解的分子模拟[J]. 化工学报, 2019, 70(4): 1522-1531. |
Feng W, Gao H F, Wang G, et al. Molecular model and pyrolysis simulation of Zaoquan coal[J]. CIESC Journal, 2019, 70(4): 1522-1531. | |
19 | Yan J, Jiao H, Li Z, et al. Kinetic analysis and modeling of coal pyrolysis with model-free methods[J]. Fuel, 2019, 241: 382-391. |
20 | Casal M D, Vega M F, Diaz-Faes E, et al. The influence of chemical structure on the kinetics of coal pyrolysis[J]. International Journal of Coal Geology, 2018, 195: 415-422. |
21 | Song H, Liu G, Zhang J, et al. Pyrolysis characteristics and kinetics of low rank coals by TG-FTIR method[J]. Fuel Processing Technology, 2016, 157: 454-460. |
22 | 邹达, 白翔, 李显, 等. 新疆和丰煤分段热解过程中产物组成的演变规律[J]. 煤炭学报, 2018, 43(3): 846-854. |
Zou D, Bai X, Li X, et al. Composition and structure evolution characteristics of product from segmenting pyrolysis of Xinjiang Hefeng coal[J]. Journal of China Coal Society, 2018, 43(3): 846-854. | |
23 | Lei S, Liu Q, Guo X, et al. Pyrolysis behavior and bonding information of coal — a TGA study[J]. Fuel Processing Technology, 2013, 108(6): 125-132. |
24 | Zhang L, Hower J C, Liu W L. Non-isothermal TG-DSC study on prediction of caking properties of vitrinite-rich concentrates of bituminous coals[J]. Fuel Processing Technology, 2017, 156: 500-504. |
25 | Wang Y G, Wei X Y, Wang S K, et al. Structural evaluation of Xiaolongtan lignite by direct characterization and pyrolytic analysis[J]. Fuel Processing Technology, 2016, 144: 248-254. |
26 | Zhou Y, Li L, Jin L, et al. Pyrolytic behavior of coal-related model compounds connected with C—C bridged linkages by in-situ pyrolysis vacuum ultraviolet photoionization mass spectrometry[J]. Fuel, 2019, 241: 533-541. |
27 | 李首毅, 林雄超, 鲁倍倍, 等. 矿物质对高碱煤显微组分热解特性的影响[J]. 化工进展, 2019, 38(8): 3650-3657. |
Li S Y, Lin X C, Lu B B, et al. Effects of minerals on pyrolysis characteristics of maceral in high-alkali coal[J]. Chemical Industry and Engineering Progress, 2019, 38(8): 3650-3657. | |
28 | Shi Z, Jin L, Zhou Y, et al. Online analysis of initial volatile products of Shenhua coal and its macerals with pyrolysis vacuum ultraviolet photoionization mass spectrometry[J]. Fuel Processing Technology, 2017, 163: 67-74. |
29 | Jin L, Han K, Wang J, et al. Direct liquefaction behaviors of Bulianta coal and its macerals[J]. Fuel Processing Technology, 2014, 128: 232-237. |
30 | Han F, Meng A, Li Q, et al. Thermal decomposition and evolved gas analysis (TG-MS) of lignite coals from Southwest China[J]. Journal of the Energy Institute, 2016, 89(1): 94-100. |
31 | Zou C, Ma C, Zhao J, et al. Characterization and non-isothermal kinetics of Shenmu bituminous coal devolatilization by TG-MS[J]. Journal of Analytical and Applied Pyrolysis, 2017, 127: 309-320. |
32 | Xu Y, Zhang Y, Wang Y, et al. Gas evolution characteristics of lignite during low temperature pyrolysis[J]. Journal of Analytical and Applied Pyrolysis, 2013, 104: 625-631. |
33 | 常海洲, 王传格, 曾凡桂, 等. 不同还原程度煤显微组分组表面结构XPS对比分析[J]. 燃料化学学报, 2006, 34(4): 389-394. |
Chang H Z, Wang C G, Zeng F G, et al. XPS comparative analysis of coal macerals with different reducibility[J]. Journal of Fuel Chemistry and Technology, 2006, 34(4): 389-394. | |
34 | Jayaraman K, Kok M V, Gokalp I. Thermogravimetric and mass spectrometric (TG-MS) analysis and kinetics of coal-biomass blends[J]. Renewable Energy, 2017, 101: 293-300. |
35 | Guo Z, Zhang L, Wang P, et al. Study on kinetics of coal pyrolysis at different heating rates to produce hydrogen[J]. Fuel Processing Technology, 2013, 107: 23-26. |
36 | Zhu C, Xie Q, Zhong J, et al. Effects of hydrothermal treatment on oxygen functional groups and pyrolysis characteristics of a vitrinite-rich low rank coal[J]. Asia-Pacific Journal of Chemical Engineering, 2019, 12: 1-13. |
37 | Niu Z, Liu G, Yin H, et al. Devolatilization behaviour and pyrolysis kinetics of coking coal based on the evolution of functional groups[J]. Journal of Analytical and Applied Pyrolysis, 2018, 134: 351-361. |
38 | Zhang L, Hower J C, Liu W. Devolatilization and kinetics of maceral concentrates of bituminous coals[J]. Fuel Processing Technology, 2016, 154: 147-155. |
[1] | 李艺彤, 郭航, 陈浩, 叶芳. 催化剂非均匀分布的质子交换膜燃料电池操作条件研究[J]. 化工学报, 2023, 74(9): 3831-3840. |
[2] | 吴雷, 刘姣, 李长聪, 周军, 叶干, 刘田田, 朱瑞玉, 张秋利, 宋永辉. 低阶粉煤催化微波热解制备含碳纳米管的高附加值改性兰炭末[J]. 化工学报, 2023, 74(9): 3956-3967. |
[3] | 陈哲文, 魏俊杰, 张玉明. 超临界水煤气化耦合SOFC发电系统集成及其能量转化机制[J]. 化工学报, 2023, 74(9): 3888-3902. |
[4] | 杨峥豪, 何臻, 常玉龙, 靳紫恒, 江霞. 生物质快速热解下行式流化床反应器研究进展[J]. 化工学报, 2023, 74(6): 2249-2263. |
[5] | 罗来明, 张劲, 郭志斌, 王海宁, 卢善富, 相艳. 1~5 kW高温聚合物电解质膜燃料电池堆的理论模拟与组装测试[J]. 化工学报, 2023, 74(4): 1724-1734. |
[6] | 衣思敏, 马亚丽, 刘伟强, 张金帅, 岳岩, 郑强, 贾松岩, 李雪. 微晶菱镁矿蒸氨及水化动力学研究[J]. 化工学报, 2023, 74(4): 1578-1586. |
[7] | 钱志广, 樊越, 王世学, 岳利可, 王金山, 朱禹. 吹扫条件对PEMFC阻抗弛豫现象和低温启动的影响[J]. 化工学报, 2023, 74(3): 1286-1293. |
[8] | 陈瑞哲, 程磊磊, 顾菁, 袁浩然, 陈勇. 纤维增强树脂复合材料化学回收技术研究进展[J]. 化工学报, 2023, 74(3): 981-994. |
[9] | 张家庆, 蒋榕培, 史伟康, 武博翔, 杨超, 刘朝晖. 煤基/石油基火箭煤油高参数黏温特性与组分特性研究[J]. 化工学报, 2023, 74(2): 653-665. |
[10] | 张娜, 潘鹤林, 牛波, 张亚运, 龙东辉. 酚醛树脂热裂解反应机理的密度泛函理论研究[J]. 化工学报, 2023, 74(2): 843-860. |
[11] | 王峰, 张顺鑫, 余方博, 刘亚, 郭烈锦. 光催化CO2还原制碳氢燃料系统优化策略研究[J]. 化工学报, 2023, 74(1): 29-44. |
[12] | 郭祥, 乔金硕, 王振华, 孙旺, 孙克宁. 碳燃料固体氧化物燃料电池结构研究进展[J]. 化工学报, 2023, 74(1): 290-302. |
[13] | 雍加望, 赵倩倩, 冯能莲. 基于非线性动态模型的质子交换膜燃料电池故障诊断[J]. 化工学报, 2022, 73(9): 3983-3993. |
[14] | 张婉晨, 陈晓阳, 吕秋秋, 钟秦, 朱腾龙. Co掺杂SrTi0.3Fe0.7O3-δ 阳极SOFC在化工副产气燃料下的性能及稳定性[J]. 化工学报, 2022, 73(9): 4079-4086. |
[15] | 郝泽光, 张乾, 高增林, 张宏文, 彭泽宇, 杨凯, 梁丽彤, 黄伟. 生物质与催化裂化油浆共热解协同作用研究[J]. 化工学报, 2022, 73(9): 4070-4078. |
阅读次数 | ||||||
全文 |
|
|||||
摘要 |
|
|||||