CIESC Journal ›› 2018, Vol. 69 ›› Issue (8): 3693-3700.DOI: 10.11949/j.issn.0438-1157.20180176

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Chlorine release during low-temperature pyrolysis of olive residue

XIE Min1, CHENG Jian1, CHEN Gang2, ZHANG Lei3, REN Xiaohan4   

  1. 1 Harbin Electric Company Limited, Harbin 150028, Heilongjiang, China;
    2 China Shipbuilding Industry Corporation No. 703 Research Institute, Harbin 150078, Heilongjiang, China;
    3 School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China;
    4 Institute of Thermal Science and Technology, Shandong University, Jinan 250061, Shandong, China
  • Received:2018-02-07 Revised:2018-04-20 Online:2018-08-05 Published:2018-08-05
  • Supported by:

    supported by the National Natural Science Foundation of China (51476046).

橄榄废弃物低温热解过程中氯的析出规律

谢敏1, 程健1, 陈刚2, 张蕾3, 任霄汉4   

  1. 1 哈尔滨电气股份有限公司, 黑龙江 哈尔滨 150028;
    2 中国船舶重工集团公司第七〇三研究所, 黑龙江 哈尔滨 150078;
    3 哈尔滨工业大学能源科学与工程学院, 黑龙江 哈尔滨 150001;
    4 山东大学热科学与工程研究中心, 山东 济南 250061
  • 通讯作者: 任霄汉
  • 基金资助:

    国家自然科学基金项目(51476046)。

Abstract:

Biomass direct combustion is the main way of biomass energy utilization. Chlorine plays an important role in boiler slagging and corrosion during the combustion of high-chlorine biomass. Low-temperature pyrolysis could make chlorine release and get the low chlorine content biomass. We assessed the effect of the low-temperature pyrolysis intensity on the chlorine content of residual biomass and of the released gaseous species. For this purpose, olive residue was subjected to low-temperature pyrolysis (mild pyrolysis) at furnace temperatures, in the range of 250-400℃ in an inert nitrogen atmosphere. The major chlorinated species in the evolving pyrolysis gas (torgas) were identified as HCl and CH3Cl, and quantified. HCl and CH3Cl will compete Cl which is released during biomass low-temperature pyrolysis and low temperature will promote the conversion of Cl to CH3Cl. When the temperature is below 350℃, CH3Cl is the main product of Cl release and when the temperature arrives at 400℃, HCl will replace CH3Cl to become the main product during low-temperature pyrolysis.

Key words: biomass, biofuel, low-temperature pyrolysis, chlorine release, HCl, CH3Cl

摘要:

生物质直燃是生物质能利用的主要方式,而含氯化合物的释放则影响了生物质锅炉的结渣与腐蚀。低温热解作为一种有效的预处理手段可以解决由氯化物导致的锅炉结渣、腐蚀问题。利用水平管式炉试验系统,测量了不同热解温度下橄榄废弃物HCl、CH3Cl等含氯物质的释放情况,分析了不同热解温度下上述污染物的释放规律。通过分析发现:HCl和CH3Cl是生物质热解过程中氯的主要析出产物,热解温度的升高有助于氯等元素分别向HCl和CH3Cl的转化,低温热解条件下氯的释放主要以CH3Cl为主,随着温度的升高,二者的差距逐渐减小,当温度达到400℃时,HCl取代CH3Cl成为生物质热解过程中主要的含氯气态产物。

关键词: 生物质, 生物燃料, 低温热解, 氯释放, HCl, CH3Cl

CLC Number: