大蒜秸秆的热解及其催化剂研究

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.

Research of Pyrolysis and Catalysts of Garlic Stalks

A pyrolysis research on garlic stalks was carried out to solve the question of its difficult use, it was found that the inorganic salts in biomass can indeed play the role of catalytic pyrolysis. Meanwhile, the pyrolysis behavior with catalyst and without catalyst were studied, it was concluded that the weightlessness percentage of garlic straw is maximum without catalyst at 500 - 600 ℃, what＇ s more the oil production rate increased with increasing temperature and the highest oil production rate appeared at 550 ℃. Subsequently, as the temperature increased, the secondary cracking intensifies and oil production rate decreased. The oil production rate increased significantly with the KOH catalyst, almost increased 15%, but the oil production rate peak are still at 500 -600℃ and explained its catalytic mechanism. What＇s more, it was found that KOH played a major role in promoting decomposition of garlic stalks surface skin cells and subcutaneous fibrous layer.