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采用固定床反应器进行气化反应的实验并结合热重分析仪对松木屑CO2催化气化进行了研究。结果表明:升高温度和添加Ca CO3、K2CO3催化剂有利于提高气体产量,降低液体和固体产量,但当温度达到950℃以后,气体产量增加的趋势减弱,液体产量反而有少许增加,固体产量缓慢减少;燃气主要组分为CO和CO2,其次为H2和CH4,其它气体为C2H6、C2H4和C2H2,含量较少;升高温度和添加Ca CO3催化剂有利于焦油的裂解,减少焦油组分,添加K2CO3催化剂使焦油组分增多;添加Ca CO3催化剂后的固体产物没有被严重破坏,但固体产物表面含有较多的Ca CO3,并形成活性中心促进松木屑与CO2的反应;添加K2CO3后的固体产物明显被破坏,K2CO3渗入到松木屑中进行催化,与C形成KCK插层结构,促进松木屑与CO2的反应。
The experiment of gasification reaction in a fixed bed reactor was carried out and the CO2 gasification of pine sawdust was studied by thermogravimetric analyzer. The results show that increasing the temperature and adding CaCO 3 and K 2 CO 3 catalysts are beneficial to increase the gas yield and reduce the liquid and solid yields. However, when the temperature reaches 950 ° C, the increase of gas production tends to be weaker, but the yield of liquid increases but the yield of solid is slow The main components of the gas are CO and CO2, followed by H2 and CH4, the other gases are C2H6, C2H4 and C2H2, the content is less; raising the temperature and adding CaCO3 catalyst is conducive to the tar cracking, reducing the tar component, adding K 2 CO 3 catalyst increased the content of tar. The solid product was not seriously damaged after the addition of CaCO 3 catalyst, but more CaCO 3 was formed on the surface of solid product, and the active center formed to promote the reaction of pine chips with CO 2. Obviously destroyed, K2CO3 penetrates into the pine chips for catalysis, forms a KCK intercalation structure with C, and promotes the reaction of pine chips and CO2.