4-Vinylphenol is an important chemical that can be used as the monomer for the production of poly(4-vinylphenol) (PVPh). Currently, 4-vinylphenol was prepared by the dehydrogenation of 4-ethylphenol over chromia/alumina catalyst at 600 °C. In this study, a low-cost process involving low-temperature fast pyrolysis of biomass without any catalyst was developed to selectively produce 4-vinylphenol. Pyrolysis gas chromatography/mass spectrometry (Py–GC/MS) was used for the fast pyrolysis of bagasse, cornstalk, bamboo, rice husk, rice straw, cotton straw, and poplar wood to investigate the effects of different materials on the selectivity of 4-vinylphenol. It was found that some of the herbaceous materials, such as bagasse, cornstalk, and bamboo, were suitable for the production of 4-vinylphenol, whereas woody materials were not applicable. The effects of temperature on 4-vinylphenol production were also investigated. 4-Vinylphenol contents of up to 7 and 20 wt % were achieved at 300 °C from bagasse and bagasse EMAL, respectively. For the first time, 4-vinylphenol was separated from the pyrolysis oil obtained by the fast pyrolysis of bagasse using a benchtop unit, and its structure was confirmed by various methods. Additionally, it was verified that 4-vinylphenol could be produced from compounds with a β-5 linkage, and a possible mechanism for the generation of 4-vinylphenol from a lignin model compound with a β-5 linkage is proposed.

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草本生物质快速热解选择性生产4-乙烯基苯酚

4-乙烯基苯酚是一种重要的化学品，可用作生产聚（4-乙烯基苯酚）（PVPh）的单体。当前，通过在氧化铬/氧化铝催化剂上在600℃下将4-乙基苯酚脱氢来制备4-乙烯基苯酚。在这项研究中，开发了一种低成本工艺，该工艺涉及无需任何催化剂的生物质的低温快速热解，以选择性地生产4-乙烯基苯酚。热解气相色谱/质谱法（Py–GC / MS）用于蔗渣，玉米秸秆，竹子，稻壳，稻草，棉稻草和杨木的快速热解，以研究不同材料对4种选择性的影响。 -乙烯基苯酚。发现一些草本材料，例如蔗渣，玉米杆和竹子，适合于生产4-乙烯基苯酚，而木质材料则不适用。还研究了温度对4-乙烯基苯酚生产的影响。在300°C下，甘蔗渣和甘蔗渣EMAL分别获得高达7和20 wt％的4-乙烯基苯酚含量。首次使用台式装置从甘蔗渣快速热解获得的热解油中分离出4-乙烯基苯酚，并通过各种方法证实了其结构。另外，证实了可以由具有β-5键的化合物产生4-乙烯基苯酚，并且提出了由具有β-5键的木质素模型化合物产生4-乙烯基苯酚的可能机理。使用台式装置从通过蔗渣的快速热解获得的热解油中分离出4-乙烯基苯酚，并通过各种方法确认了其结构。另外，证实了可以由具有β-5键的化合物产生4-乙烯基苯酚，并且提出了由具有β-5键的木质素模型化合物产生4-乙烯基苯酚的可能机理。使用台式装置从通过蔗渣的快速热解获得的热解油中分离出4-乙烯基苯酚，并通过各种方法确认了其结构。另外，已经证实可以从具有β-5键的化合物生产4-乙烯基苯酚，并且提出了从具有β-5键的木质素模型化合物生成4-乙烯基苯酚的可能机理。