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首页> 外文期刊>Environmental Science & Technology >Thermochemical Behavior of Tris(2-Butoxyethyl) Phosphate (TBEP during Co-pyrolysis with Biomass
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Thermochemical Behavior of Tris(2-Butoxyethyl) Phosphate (TBEP during Co-pyrolysis with Biomass

机译：三（2-丁氧基乙基）磷酸酯（TBEP）与生物质共热解过程中的热化学行为

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摘要

Co-pyrolysis of plastic waste and wood biomass to recover valuable chemicals is a cost-effective waste-recycling technology. However, widely used organophosphate ester additives in plastic, such as tris(2-butoxyethyl) phosphate (TBEP), can form diverse phosphorus (P)-containing species. These P-containing compounds can pose new environmental challenges when the biochar is reused. In this study, a mixture of TBEP and lignin was used to simulate the feedstock of plastic waste and wood biomass, and the thermochemical behavior of TBEP in slow pyrolysis (20 K min~(-1)) and fast pyrolysis at 400-600℃ was investigated. The results show that low temperature in fast pyrolysis favors the enrichment of P in char. Up to 76.6% of initial P in the feedstock is retained in the char resulting from 400℃, while only 51% is retained in the char from 600℃. Slow pyrolysis favors the formation of stable P species regardless of the temperature; only 7% of the P retained in the char is extractable from char from slow Dvrolvsis. while 20-40% of P can be extracted from char resulting from fast pyrolysis. The addition of CaCl_2 and MgCl_2 can significantly increase the fraction of P retained in the char by the formation of Ca, Mg-P compounds. Online TG-FTIR-MS analysis suggests that TBEP undergoes decomposition through different temperature-dependent pathways. The P-containing radicals react with the aromatic rings produced by the pyrolysis of lignin to form Ar-P species, which is an important factor influencing the distribution and stabilization of P in char.
机译：塑料废物和木材生物质的共热解以回收有价值的化学物质是一种经济高效的废物回收技术。但是，塑料中广泛使用的有机磷酸酯添加剂，例如磷酸三（2-丁氧基乙基）酯（TBEP），可以形成各种含磷（P）的物质。当生物炭再利用时，这些含P的化合物可能带来新的环境挑战。本研究采用TBEP和木质素的混合物模拟塑料废料和木材生物质的原料，以及TBEP在400-600℃的慢速热解（20 K min〜（-1））和快速热解中的热化学行为。被调查了。结果表明，快速热解过程中的低温有利于焦炭中磷的富集。从400℃到焦炭中，原料中高达76.6％的初始P被保留在焦炭中，而从600℃开始，焦炭中仅保留了51％。慢速热解有利于形成稳定的P物质，而与温度无关。从慢速Dvrolvsis的炭中只能提取出炭中保留的P的7％。快速热解可从焦炭中提取20-40％的P。 CaCl_2和MgCl_2的添加可以通过形成Ca，Mg-P化合物来显着增加炭中保留的P的比例。 TG-FTIR-MS在线分析表明，TBEP通过不同的温度依赖性途径进行分解。含P的自由基与木质素热解产生的芳环反应形成Ar-P物质，这是影响P在炭中分布和稳定的重要因素。

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  • 来源
    《Environmental Science & Technology》 |2014年第18期|10734-10742|共9页
  • 作者

    Ting-Ting Qian; De-Chang Li; Hong Jiang;

  • 作者单位

    Department of Chemistry, University of Science and Technology of China, Hefei 230026, People's Republic of China;

    Department of Chemistry, University of Science and Technology of China, Hefei 230026, People's Republic of China;

    Department of Chemistry, University of Science and Technology of China, Hefei 230026, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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