氧化钙催化煤温和气化研究

报道了神木煤在小型流不反应器中，于４５０～７５０℃温度内，用ＣａＯ催化煤温和气化的研究。结果表明：添加ＣａＯ后，气体和半焦产率增加，焦油产率减少；ＣａＯ粒子对煤温和气化生成的焦裂解具有明显催化作用；可以明显增加气相中Ｈ２、ＣＨ４、Ｃ１～Ｃ５产率，降低半焦中Ｈ／Ｃ比，ＣａＯ还具有明显的固硫和固ＣＯ２作用，最后，推测了煤温和气化中ＣａＯ催化裂解多环芳烃侧链的机理。

STUDY ON COAL MILD GASIFICATION WITH CaO CATALYST

In this paper a study on coal mild gasification with added CaO catalyst in fludized bed reactor (FBR) is reported. The reaction temperature range was from 450℃ to 750℃. It is found that CaO catalyst can increase gas and char yield, but decrease tar yield. It imply that CaO catalyst can greately affect the tar fragmentation reactions, leading to an increase in yields of H2, CH4 and C1～C5 in gas. Contents of ash and volitle matter in the char are also increased, but H/C ratio is decreased. It is also found that CaO have the capability of desulfurization and CO2 absorption. The mechanism on fracture of side chain in polycycle aromatics by CaO catalyst in coal mild gasification is discussed.