微拟球藻热解及其催化热解制备生物油研究

在氮气气氛下对微拟球藻直接热解及其在H-ZSM-5上的催化热解实验进行了研究。在573K～773K考察了热解温度对热解油产物分布的影响。与木质纤维素生物质的热解相比，微拟球藻的热解不仅温度更低，而且油的收率更高。催化剂H-ZSM-5在热解中起到了脱极性官能团和芳构化的作用，使得热解油中的芳香族化合物含量增多，极性化合物含量减少。与木质纤维素生物质相比，微拟球藻热解获得的油热值更高，适合进一步加工为燃油。

Production of bio-oil by direct and catalytic pyrolysis of Nannochloropsis sp.

Nannochloropsis sp. was pyrolyzed directly or with H-ZSM-5 as catalyst under nitrogen atmosphere to produce bio-oil. The influence of pyrolysis temperature on the product distribution in the pyrolytic oil was investigated within the range of 573K～773K. Compared with the pyrolysis of lignocellulosic biomass, the pyrolysis of Nannochloropsis sp. can be performed at relatively lower temperature and with higher oil yield. H-ZSM-5 is effective for the removal of various polar functional groups as well as for the aromatization; and the bio-oil obtained with H-ZSM-5 catalyst contains more aromatic compounds and fewer polar species than that from direct pyrolysis. The heating values of the bio-oil from Nannochloropsis sp. is higher than that from lignocellulosic biomass, and thus the former is more suitable to be upgraded to practical fuel.