提高厌氧消化稻草热解生物油质量和酚类化合物选择性。
Enhancing the quality of bio-oil and selectivity of phenols compounds from pyrolysis of anaerobic digested rice straw.
机构信息
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, PR China.
College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Guangdong 510640, PR China.
出版信息
Bioresour Technol. 2015 Apr;181:220-3. doi: 10.1016/j.biortech.2015.01.056. Epub 2015 Jan 20.
This study investigated the thermal decomposition characteristics and pyrolytic products of anaerobic digested rice straw (ADRS) by thermogravimetric (TG) and pyrolysis-gas chromatograph/mass spectrometry (Py-GC/MS) analysis. Compared with the raw rice straw (RS), the thermal decomposition temperature of ADRS was shifted to higher temperature zone and the second decomposition zone of cellulose (Toffset(c)-Tpeak) became narrower (14 °C less), which indicated that the composition of rice straw were changed significantly by the anaerobic digestion pretreatment. Py-GC/MS analysis showed that the quality of the bio-oil and the selectivity of pyrolytic products could be obviously improved by anaerobic digestion. The total yields of alcohols, acids, aldehydes, furans, anhydrosugars, and ketones pyrolysis substances decreased, while the yield of phenols increased. The yield of 4-Vinylphenol (4-VP) increased from 29.33%, 8.21% and 5.76% to 34.93%, 12.46% and 7.68% at 330, 450 and 650 °C, respectively, after anaerobic digestion.
本研究采用热重（TG）和热解-气相色谱/质谱联用（Py-GC/MS）分析方法，研究了厌氧消化水稻秸秆（ADRS）的热分解特性和热解产物。与原水稻秸秆（RS）相比，ADRS 的热分解温度向高温区偏移，纤维素的第二分解区（Toffset(c)-Tpeak）变窄（14°C），这表明厌氧消化预处理显著改变了水稻秸秆的组成。Py-GC/MS 分析表明，厌氧消化可以明显改善生物油的质量和热解产物的选择性。醇、酸、醛、呋喃、无水糖和酮类热解产物的总收率降低，而酚类的收率增加。4-乙烯基苯酚（4-VP）的收率分别从 330、450 和 650°C 下的 29.33%、8.21%和 5.76%增加到 34.93%、12.46%和 7.68%。
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