碱金属(K)对焦炭不同光学组织气化规律的试验研究

在1100℃下，碳粉与无水碳酸钾反应会生成钾蒸汽，同时向管式炉中通入5L/min CO₂或者H₂O，使钾蒸汽和反应气体同时作用于焦炭2 h.实验完成后，对原始焦炭、无碱反应后焦炭和有碱反应后的焦炭进行光学组织鉴定.结果表明，在无碱蒸汽条件下，与各向异性组织相比，各项同性组织的反应性更高.但是，当钾蒸汽和CO₂或H₂O同时作用于焦炭后发现，各项同性组织的反应性却比各项异性组织的反应性低，这是因为各向异性组织对碱的吸附能力强，碱金属在其内部渗透能力较强，可能会生成更多的层间化合物，这对焦炭的气化反应具有催化作用. 

An experimental study on gasification of different optical texture of coke by alkali metal (K)

Carbon powder reacted with anhydrous potassium carbonate to produce potassium vapor at 1100 ℃, and at the same time, 5L/minCO₂ or H₂O was injected into the tube furnace to make the potassium vapor and reaction gas act on the coke 2h simultaneously.After the completion of the test, the original coke, reacted coke without potassium and reacted coke within potassium were taken for optical texture identification.It was found that the reactivity of isotropic texture of coke was higher than that of anisotropic texture under alkali-free vapor conditions.However, when alkali vapor and CO₂ or H₂O acted simultaneously on the coke, it was found that the reactivity ofthe isotropic texture was lower than that of anisotropic texture. This is because the anisotropic texture has a strong adsorption capacity for the alkali, and the alkali metal has a stronger internal permeability, causing more interlayer compoundsproduced, which can catalyze the gasification reaction of coke.