Pyrolysis temperature and subsequent preservation time have a significantly influence on the chemical components and properties of pyroligneous acids. In this study, the pyroligneous acids were successively generated by a polygeneration process from the cotton stalk (CS). The pyrolysis process was systematically investigated by using a laboratory-scale pyrolysis retort under different pyrolysis temperatures (300, 350, 400, 450, 500, and 550 °C). Pyroligneous acids of one month storage and six months storage were analyzed and compared in the chemical composition and properties. Results showed that the total amino acid content of pyroligneous acid stored for six months was significantly lower than that in one-month storage. The pyroligneous acid of six months storage showed better inhabitation of some bacteria activities than that of one month. This phenomenon was associated with the increment of phenol and ketone compounds. The data also presented indicated that the pyroligneous acids obtained from 450 °C pyrolysis temperature via six months storage were more appropriate for an antimicrobial and pesticidal agent. The preliminary screening of pyrolysis temperature and storage time could provide a promising practical basis for the economic benefit and performance of pyrolysis products from cotton stalk.

热解温度和随后的保存时间对焦木酸的化学成分和性能有显着影响。在这项研究中，焦木酸是通过棉秆（CS）的多联生成过程连续生成的。通过使用实验室规模的热解罐在不同的热解温度（300、350、400、450、500和550°C）下系统地研究了热解过程。分析了分别储存一个月和六个月的吡咯烷酸的化学组成和性质。结果表明，贮藏六个月的木焦木酸的总氨基酸含量明显低于贮藏一个月的木糖。储存六个月的木焦木酸比一个月的细菌表现出更好的居住能力。这种现象与苯酚和酮化合物的增加有关。还提供的数据表明，在450°C的热解温度下经过6个月的储存获得的焦木酸更适合用作抗微生物和杀虫剂。初步筛选热解温度和储存时间可以为棉秆热解产物的经济效益和性能提供有希望的实践基础。