Abstract In this study, four kinds of porous silica-based materials with site-separated acids and bases were prepared, the catalysts possess both micropores and mesopores with a specific surface areas ranging from 764 m2/g to 1016 m2/g. Moreover, the effects of the catalysts on the yield and quality of bio-oil derived from hydrothermal liquefaction (HTL) of microalgae Chlorella were investigated. The results showed that the catalyst had no obvious change on the bio-oil yield, but they exhibited good performance in the improving of bio-oil quality. Catalyst with acids inside and outside of the pores worked best in denitrification of the bio-oil while catalyst with bases inside and outside of the pores achieved the minimum sulfur content of the bio-oil (0.65%). GC–MS analysis indicated that the catalyst with site-separated acids and bases showed magnified selectivity to hydrocarbons (over 50% of peak area). Furthermore, the catalyst could increase the low boiling fraction (

中文翻译：

---

微藻在具有位点分离的酸和碱的介孔二氧化硅基材料上催化水热液化

摘要 本研究制备了4种酸碱位点分离的二氧化硅基多孔材料，催化剂具有微孔和介孔，比表面积为764 m2/g~1016 m2/g。此外，还研究了催化剂对微藻小球藻水热液化 (HTL) 生物油产量和质量的影响。结果表明，该催化剂对生物油收率无明显变化，但在提高生物油品质方面表现出良好的性能。孔内外酸催化剂对生物油脱硝效果最好，而孔内外碱催化剂达到生物油的最低硫含量（0.65%）。GC-MS 分析表明，带有位点分离的酸和碱的催化剂对碳氢化合物显示出更大的选择性（超过峰面积的 50%）。此外，催化剂可以增加低沸点分数（