Kim Seong-Soo, Lee Hyung Won, Ryoo Ryong, Kim Wookdong, Park Sung Hoon, Jeon Jong-Ki, Park Young-Kwon
J Nanosci Nanotechnol. 2014 Mar;14(3):2414-8. doi: 10.1166/jnn.2014.8545.
Catalytic pyrolysis of kraft lignin was carried out using pyrolysis gas chromatography/mass spectrometry. Hierarchical mesoporous MFI was used as the catalyst and another mesoporous material Al-SBA-15 was also used for comparison. The characteristics of mesoporous MFI were analyzed by X-ray diffraction patterns, N2 adsorption-desorption isotherms, and temperature programmed desorption of NH3. Two catalyst/lignin mass ratios were tested: 5/1 and 10/1. Aromatics and alkyl phenolics were the main products of the catalytic pyrolysis of lignin over mesoporous MFI. In particular, the yields of mono-aromatics such as benzene, toluene, ethylbenzene, and xylene were increased substantially by catalytic upgrading. Increase in the catalyst dose enhanced the production of aromatics further, which is attributed to decarboxylation, decarbonlyation, and aromatization reactions occurring over the acid sites of mesoporous MFI.
采用热解气相色谱/质谱联用仪对硫酸盐木质素进行催化热解。使用分级介孔MFI作为催化剂，另一种介孔材料Al-SBA-15也用于对比。通过X射线衍射图谱、N2吸附-脱附等温线和NH3程序升温脱附对介孔MFI的特性进行了分析。测试了两种催化剂/木质素质量比：5/1和10/1。芳烃和烷基酚是木质素在介孔MFI上催化热解的主要产物。特别是，苯、甲苯、乙苯和二甲苯等单芳烃的产率通过催化提质大幅提高。催化剂用量的增加进一步提高了芳烃的产量，这归因于在介孔MFI的酸性位点上发生的脱羧、脱羰和芳构化反应。
