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预脱氯处理PVC残渣和平朔煤共热解的协同效应研究

张康莹 武云飞 王德超 靳立军 胡浩权

张康莹, 武云飞, 王德超, 靳立军, 胡浩权. 预脱氯处理PVC残渣和平朔煤共热解的协同效应研究[J]. 燃料化学学报. doi: 10.1016/S1872-5813(21)60074-9
引用本文: 张康莹, 武云飞, 王德超, 靳立军, 胡浩权. 预脱氯处理PVC残渣和平朔煤共热解的协同效应研究[J]. 燃料化学学报. doi: 10.1016/S1872-5813(21)60074-9
Zhang Kang-ying, Wu Yun-fei, Wang De-chao, Jin Li-jun, Hu Hao-quan. Synergistic effect of co-pyrolysis of pre-dechlorination treated PVC residue and Pingshuo coal[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(21)60074-9
Citation: Zhang Kang-ying, Wu Yun-fei, Wang De-chao, Jin Li-jun, Hu Hao-quan. Synergistic effect of co-pyrolysis of pre-dechlorination treated PVC residue and Pingshuo coal[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(21)60074-9

预脱氯处理PVC残渣和平朔煤共热解的协同效应研究

doi: 10.1016/S1872-5813(21)60074-9
基金项目: 国家自然科学基金项目(22078053)
详细信息
    通讯作者:

    Tel:0411-84986157,E-mail:hhu@dlut.edu.cn

  • 中图分类号: TQ530.2

Synergistic effect of co-pyrolysis of pre-dechlorination treated PVC residue and Pingshuo coal

Funds: The project was supported by National Natural Science Foundation of China (22078053)
  • 摘要: 热解是煤炭清洁高效利用的有效途径,也是处理废旧塑料高效转化的重要方式。本文针对无害化处理困难的含氯塑料,以聚氯乙烯(PVC)和平朔煤为研究对象,提出将PVC先经预热处理脱除大部分氯,然后将预处理后的PVC残渣与煤进行共热解,并利用气相色谱(GC),模拟蒸馏,GC-MS,元素分析,红外光谱及拉曼光谱等对热解产生的气体、焦油以及半焦的组成和性质进行分析表征。结果表明,预脱氯处理后的PVC和平朔煤的共热解过程存在协同效应,共热解对半焦和焦油的形成具有明显的正协同作用,焦油产率实验值比理论计算值最大高3.35 wt.%;而对热解水和气体的形成产生负协同作用,其中CH4产率下降最多,即出现最强的负协同效应;共热解使焦油中轻质焦油含量提高,其中萘类物质含量显著增加,沥青减少,当预脱氯处理PVC添加量为10 wt.%时,轻质焦油含量比理论计算值提高5个百分点。此外,共热解半焦表面更为光滑,结构变得更加有序,石墨化度提高。
  • 图  1  固定床热解反应装置示意图

    Figure  1.  Schematic diagram of fixed-bed pyrolysis reactor

    图  2  PVC的TG-DTG曲线(a)及不同温度下热解产物产率(b)

    Figure  2.  TG-DTG curves (a) and product yield from pyrolysis of PVC at different temperature (b)

    图  3  PVC在250 °C, 300 °C, 和350 °C下热处理残渣的TG(a)和DTG(b)曲线

    Figure  3.  TG (a) and DTG (b) curves of DPVC from 250 °C, 300 °C, and 350 °C

    图  4  不同温度下PVC热解残渣的形态

    Figure  4.  Morphology of residue from PVC pyrolysis at different temperatures

    图  5  平朔煤的TG-DTG曲线(a)及不同温度下热解产物产率分布(b)

    Figure  5.  TG-DTG curves (a) and pyrolysis product yield (b) of PS coal

    图  6  平朔煤与不同比例DPVC共混后的TG-DTG分析结果

    Figure  6.  TG-DTG curves of mixed PS coal and DPVC in different ratios

    图  7  平朔煤与不同质量比例DPVC混合物共热解产物产率(a)及协同效应(b)

    Figure  7.  Effect of DPVC to PS coal mass ratio on yield (a) and synergistic effect (b) of co-pyrolysis

    图  8  不同比例DPVC添加量对共热解气体产物组成产率的影响(a)及协同效应(b)

    Figure  8.  Effect of DPVC mixing ratio on gas composition yield (a) and synergistic effect (b) of co-pyrolysis

    图  9  不同比例DPVC添加量共热解焦油的模拟蒸馏结果(a)及协同作用分析(b)

    Figure  9.  Simulated distillation (a) and synergy analysis (b) of co-pyrolysis tar with different DPVC content

    图  10  不同比例DPVC添加量对共热解焦油中不同物质相对含量影响

    Figure  10.  Effect of DPVC content on relative content of different compounds in tar from co-pyrolysis

    图  11  平朔煤与DPVC共热解半焦形貌(a),拉曼光谱分析(b)和红外光谱分析(c)结果

    Figure  11.  Co-pyrolysis char morphology (a), Raman spectrum (b) and FT-IR (c) of PS coal and DPVC

    表  1  平朔煤、PVC和350 °C热解PVC残渣的工业分析和元素分析

    Table  1.   Proximate and ultimate analyses of PS coal, PVC and DPVC at 350 °C

    SampleProximate analysis (wt.%)Ultimate analysis (wt.%, daf)
    MadAdVdafCHNSO*Cl*
    PS Coal0.9325.5339.7378.165.182.811.2012.65
    PVC0095.7338.094.7857.13
    DPVC(350 °C)0078.1691.917.370.72
    *: by difference
    下载: 导出CSV
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  • 网络出版日期:  2021-04-02

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