Aimed to obtain high-quality pyrolysis liquid products, the effects of different calcium-based catalysts and temperatures on liquid products from catalytic pyrolysis of municipal sludge (moisture of 50%) were studied. Results showed that the liquid product yield reached maximum at 600 °C and then decreased. The catalyst capability of catalysts decreased the yield of liquid products in the order of poorly soluble in water (Ca(OH)₂, CaCO₃, CaO) > soluble in water (CaCl₂, Ca(H₂PO₄)₂·H₂O). High temperature strengthened the aromatization, and the breaking of the oxygen-containing functional group in liquid products resulted in the decrease of O/C and H/C molar ratios and the increase of four components yield in gaseous products. At 600 °C, the catalysts significantly reduced the O content of liquid products and increased hydrocarbon content. Meantime, CaO additive increased the content of C to 85.34%, and the relative content of aromatics reached 83.99% at 800 °C, which is suitable as chemical raw materials. However, the Ca(OH)₂ group had the highest aliphatics content, and the H/C molar ratio was 1.42 at 400 °C, which is suitable as fuel.

中文翻译：

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钙基催化剂对城市污泥热解液体产物的影响

为了获得高质量的热解液体产品，研究了不同钙基催化剂和温度对城市污泥（水分含量为50％）的催化热解液体产品的影响。结果表明，液体产物的收率在600°C时达到最大值，然后下降。催化剂的催化能力按难溶于水（Ca（OH）₂，CaCO ₃，CaO）的顺序>易溶于水（CaCl ₂，Ca（H ₂ PO ₄）₂ ·H ₂O）。高温增强了芳构化作用，液态产品中含氧官能团的断裂导致O / C和H / C摩尔比降低，气态产品中四组分收率提高。在600°C下，催化剂显着降低了液体产品中的O含量，并增加了烃含量。同时，CaO添加剂将C的含量提高到85.34％，在800°C时芳烃的相对含量达到83.99％，适合作为化学原料。然而，Ca（OH）₂基团具有最高的脂肪族含量，并且在400℃下H / C摩尔比为1.42，这适合用作燃料。