Jeon Mi-Jin, Kim Seung-Soo, Jeon Jong-Ki, Park Sung Hoon, Kim Ji Man, Sohn Jung Min, Lee See-Hoon, Park Young-Kwon
Graduate School of Energy and Environmental System Engineering, University of Seoul, Seoul, 130-743, Korea.
Nanoscale Res Lett. 2012 Jan 5;7(1):18. doi: 10.1186/1556-276X-7-18.
Catalytic fast pyrolysis of waste rice husk was carried out using pyrolysis-gas chromatography/mass spectrometry [Py-GC/MS]. Meso-MFI zeolite [Meso-MFI] was used as the catalyst. In addition, a 0.5-wt.% platinum [Pt] was ion-exchanged into Meso-MFI to examine the effect of Pt addition. Using a catalytic upgrading method, the activities of the catalysts were evaluated in terms of product composition and deoxygenation. The structure and acid site characteristics of the catalysts were analyzed by Brunauer-Emmett-Teller surface area measurement and NH3 temperature-programmed desorption analysis. Catalytic upgrading reduced the amount of oxygenates in the product vapor due to the cracking reaction of the catalysts. Levoglucosan, a polymeric oxygenate species, was completely decomposed without being detected. While the amount of heavy phenols was reduced by catalytic upgrading, the amount of light phenols was increased because of the catalytic cracking of heavy phenols into light phenols and aromatics. The amount of aromatics increased remarkably as a result of catalytic upgrading, which is attributed to the strong Brönsted acid sites and the shape selectivity of the Meso-MFI catalyst. The addition of Pt made the Meso-MFI catalyst even more active in deoxygenation and in the production of aromatics.
采用热解-气相色谱/质谱联用仪（Py-GC/MS）对废弃稻壳进行催化快速热解。使用介孔MFI沸石（Meso-MFI）作为催化剂。此外，将0.5 wt.%的铂（Pt）离子交换到Meso-MFI中，以研究添加Pt的效果。采用催化提质方法，根据产物组成和脱氧情况对催化剂的活性进行评估。通过Brunauer-Emmett-Teller比表面积测量和NH₃程序升温脱附分析对催化剂的结构和酸位特性进行分析。由于催化剂的裂解反应，催化提质减少了产物蒸汽中含氧化合物的量。左旋葡聚糖，一种聚合含氧化合物，完全分解未被检测到。虽然催化提质减少了重质酚的量，但由于重质酚催化裂化为轻质酚和芳烃，轻质酚的量增加了。催化提质显著增加了芳烃的量，这归因于Meso-MFI催化剂强大的布朗斯特酸位和择形性。Pt的添加使Meso-MFI催化剂在脱氧和芳烃生产方面更具活性。
