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费托蜡热裂解制线性α-烯烃工艺研究

李镇伶 程嵩鹏 安良成 刘素丽 韩婷婷 孙功成 吕俊敏 范素兵 赵天生

李镇伶, 程嵩鹏, 安良成, 刘素丽, 韩婷婷, 孙功成, 吕俊敏, 范素兵, 赵天生. 费托蜡热裂解制线性α-烯烃工艺研究[J]. 燃料化学学报. doi: 10.1016/S1872-5813(22)60056-2
引用本文: 李镇伶, 程嵩鹏, 安良成, 刘素丽, 韩婷婷, 孙功成, 吕俊敏, 范素兵, 赵天生. 费托蜡热裂解制线性α-烯烃工艺研究[J]. 燃料化学学报. doi: 10.1016/S1872-5813(22)60056-2
LI Zhen-ling, CHENG Song-peng, AN Liang-cheng, LIU Su-li, HAN Ting-ting, SUN Gong-cheng, LV Junmin, FAN Su-bing, ZHAO Tian-sheng. Cracking of F-T refined wax for producing linear α-olefin[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(22)60056-2
Citation: LI Zhen-ling, CHENG Song-peng, AN Liang-cheng, LIU Su-li, HAN Ting-ting, SUN Gong-cheng, LV Junmin, FAN Su-bing, ZHAO Tian-sheng. Cracking of F-T refined wax for producing linear α-olefin[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(22)60056-2

费托蜡热裂解制线性α-烯烃工艺研究

doi: 10.1016/S1872-5813(22)60056-2
基金项目: 宁夏自然科学基金(2020AAC03012)和宁夏重点研发计划(2018BDE02057)资助
详细信息
    通讯作者:

    E-mail: lvjunmin@nxu.edu.cn

    fansb@nxu.edu.cn

  • # These authors contributed equally to this work
  • 中图分类号: TQ203.8;TQ645.9 + 3;TQ649.4 + 2

Cracking of F-T refined wax for producing linear α-olefin

Funds: The project was supported by Ningxia Natural Science Foundation(2020AAC03012) and the Key R&D Program of Ningxia (grant number 2018BDE02057).
  • 摘要: 以煤制油工艺费托精制蜡为原料,在固定床反应器上进行了热裂解制线性α-烯烃(LAO)的实验,考察了原料组成、裂解温度、停留时间、水蜡比及循环工艺对转化率及裂解产物分布的影响,优化了工艺条件。裂解温度及停留时间对原料转化率及LAO收率有显著影响,循环工艺可进一步提高LAO收率。过高的裂解温度或过长的停留时间均会导致生成的LAO的二次反应,对反应不利。在适合的工艺条件下可获得超过50%的LAO收率。
    1)  # These authors contributed equally to this work
  • 图  1  不同费托蜡碳数分布对比

    Figure  1  Carbon number distribution of F-T wax

    图  2  不同原料蜡的单程转化率、α-烯烃选择性及收率

    Figure  2  Conversion, selectivity and yield of LAO for different wax

    图  3  不同原料裂解的液相产物分布(a)和LAO碳数分布(b)

    Figure  3  Liquid product distribution (a) and carbon number distribution of LAO (b) for different wax

    图  4  反应后填料的TG分析

    Figure  4  TG analysis of quartz sand after reaction

    图  5  不同裂解温度下转化率、选择性及收率变化

    Figure  5  Conversion, selectivity and yield at cracking temperatures

    图  6  不同温度裂解气液产物组成(a)和LAO碳数分布(b)

    Figure  6  Composition of gas/liquid product (a) and carbon number of LAO (b) at cracking temperatures

    图  7  不同停留时间的转化率、选择性及收率: (a)500 ℃; (b)550℃; (c) 600℃; (d)650 ℃

    Figure  7  Conversion, selectivity and yield at different retention times (a)500 ℃; (b)550 ℃; (c) 600 ℃; (d)650 ℃

    图  8  不同温度条件下不同停留时间裂解产物分布:(a) 500 ℃; (b) 550 ℃; (c) 600 ℃; (d) 650 ℃

    Figure  8  Cracking products distribution at different residence times under different temperature conditions: (a) 500 ℃; (b) 550 ℃; (c) 600 ℃; (d) 650 ℃

    图  9  裂解产物LAO的碳数分布:(a)550 ºC;(b)600 ℃

    Figure  9  Carbon number distribution of LAO at 550 ℃ (a) and 600 ℃ (b)

    图  10  不同水蜡比裂解的转化率、选择性和收率

    Figure  10  Conversion, selectivity and yield at different water-wax ratios

    图  11  不同水蜡比(a)液相产物分布;(b)LAO碳数分布

    Figure  11  (a) Liquid product distribution; (b) Carbon number distribution of LAO at different water-wax ratios

    图  12  不同循环原料对LAO收率的影响

    Figure  12  Effect of different recycle feed on LAO yield

    表  1  费托蜡基本组成

    Table  1  Composition of Fischer-Tropsch refined wax

    Fischer-Tropsch
    refined wax
    1#2#3#4#5#
    Composition
    /wt%
    n-paraffin95.5693.4987.9695.1199.11
    i-paraffin4.446.5112.044.890.89
    other00000
    heavy hydrocarbon
    (>C25)
    --0.3432.3444.10
    下载: 导出CSV

    表  2  不同原料蜡的裂解气组成

    Table  2  Composition of cracking gas for different wax

    Feedstock1#2#3#4#5#
    Yield /%2.33.14.910.17.4
    Selectivity
    /%
    methane24.224.022.222.422.5
    ethane14.814.813.613.311.3
    ethylene39.339.236.138.039.8
    propylene14.414.617.115.315.4
    propane1.31.21.51.51.0
    isobutene0.00.00.03.80.0
    n-butene3.23.44.01.63.6
    n-butane1.01.02.00.51.9
    maleic0.10.10.30.30.3
    C5+1.61.73.23.34.1
    下载: 导出CSV

    表  3  不同循环原料的基本组成

    Table  3  The basic composition of recycling feed

    Composition
    /%
    Feedstock
    4#123
    n-paraffin95.195.291.890.6
    iso-paraffin4.93.03.53.4
    LAO01.74.65.8
    total olefins01.74.86.0
    heavy
    hydrocarbon
    (C25+
    32.330.829.930.9
    下载: 导出CSV
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  • 收稿日期:  2022-04-30
  • 录用日期:  2022-07-13
  • 修回日期:  2022-07-12
  • 网络出版日期:  2022-08-04

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