十六烷基三甲基溴化铵改性分级 HZSM-5 催化快速热解稻草芳烃收率的提高。
Enhancement in the aromatic yield from the catalytic fast pyrolysis of rice straw over hexadecyl trimethyl ammonium bromide modified hierarchical HZSM-5.
机构信息
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China.
出版信息
Bioresour Technol. 2018 May;256:241-246. doi: 10.1016/j.biortech.2018.02.036. Epub 2018 Feb 8.
Modified H-type ZSM-5 (HZSM-5) catalysts were prepared using hexadecyl trimethyl ammonium bromide (CTAB) as mesopore templates to enhance the activity for the catalytic fast pyrolysis of rice straw for aromatics compounds. A certain quantity of CTAB added into the HZSM-5 (HZ) forming hierarchical structure exhibited an improvement in the yield of the aromatics and a decrease in the yield of coke in comparison with that of bare HZ. In contrast, excessive CTAB addition resulted in a decrease in aromatic yield and an increase in coke yield. The effects of crystallinity, textural properties, morphological structure and acidity distribution on the production of aromatic compounds were measured by XRD, BET, TEM and NH-TPD. The good crystallinity, small amount of mesopore formation and highest total acidity discovered in HZ-0.01 (the mole ratio of CTAB/SiO is 0.01) provided the highest aromatic compound yield of 26.8% and the lowest coke yield of 39.2%.
改性 H 型 ZSM-5（HZSM-5）催化剂采用十六烷基三甲基溴化铵（CTAB）作为中孔模板制备，以提高稻秸催化快速热解生成芳烃化合物的活性。将一定量的 CTAB 添加到 HZSM-5（HZ）中形成分级结构，与裸 HZ 相比，芳烃收率提高，焦炭收率降低。相比之下，过量添加 CTAB 会导致芳烃收率降低，焦炭收率增加。通过 XRD、BET、TEM 和 NH-TPD 测量结晶度、织构性质、形态结构和酸度分布对芳烃化合物生成的影响。在 HZ-0.01（CTAB/SiO 的摩尔比为 0.01）中发现良好的结晶度、少量的中孔形成和最高的总酸度，提供了最高的芳烃化合物收率 26.8%和最低的焦炭收率 39.2%。
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