论文部分内容阅读
针对大蒜秸秆难利用的问题,对其进行了热解研究,发现生物质内的无机盐确实可以起到热解催化的作用。同时研究了没有催化剂和有催化剂两种情况下的热解行为,发现无催化剂时大蒜秸秆在500~600℃间失重百分比最大,且裂解产油率随着温度升高而增加,在550℃时产油率最高,随后随着温度增加,二次裂解加剧产油率降低;而在KOH的催化作用下产油率明显增加,产油率几乎增加了15%,但产油率峰值仍在500~600℃。并发现KOH促进大蒜秸秆表面皮下细胞及皮下纤维层进行分解是主要的作用。
Aiming at the problem of difficult utilization of garlic straw, the pyrolysis study was carried out on it, and it was found that the inorganic salts in biomass can indeed play the role of pyrolysis and catalysis. At the same time, the pyrolysis behavior in the absence of catalyst and in the presence of catalyst was studied. It was found that the weight loss percentage of garlic straw was the highest between 500 and 600 ℃ without catalyst and the yield of pyrolysis increased with the increase of temperature. With the increase of temperature, the second cracking led to the decrease of oil yield. However, the yield of oil increased obviously with KOH catalysis, oil yield increased almost 15%, but the peak of oil yield was still at 500 ~ 600 ℃. It is found that KOH can promote the decomposition of subcutaneous cells and subcutaneous fibrous layers on the surface of garlic straw.