制备了5% Co/USY、5% Mg/USY和1% Co-5% Mg/USY、1% Mg-5% Co/USY等2种金属改性的USY分子筛，利用XRD、BET、NMR、Py-IR等对其结构进行了表征。通过TG及Py-GC-MS探究了不同分子筛在树皮煤热解中的定向催化作用及对焦油组分分布的影响。结果表明，较之单金属担载，1% Co-5% Mg/USY和5% Co-1% Mg/USY催化剂总酸量降低；4种催化剂对于提高热解焦油中芳烃质量分数均有一定作用，其中5% Mg/USY分子筛效果最明显，芳烃质量分数增加15%，这与脂肪烃转变缩合有关；芳烃中轻质芳烃质量分数提高4%；1% Co-5% Mg/USY有助于酚类脱氧形成芳烃。

Co and Mg modified USY molecular sieves with compositions such as 5% Co/USY,5% Mg/USY and 1% Co-5% Mg/USY,1% Mg-5% Co/USY are prepared,and analyzed by XRD,BET,NMR,and PY-IR.By means of TG and PY-GC-MS,the directional catalysis of different molecular sieves and their effects on the distribution of tar components are investigated in the pyrolysis of bark coal.It is shown that compared with single metal modified USY,1% Co-5% Mg/USY and 5% Co-1% Mg/USY have less total acid contents.Four kinds of catalysts all play a certain role in enhancing the aromatics content in tar product from pyrolysis,among which 5% Mg/USY molecular sieve plays the most obvious effect,and make the aromatics content increase by 15%,which is related to aliphatic hydrocarbon conversion condensation.The content of light aromatic hydrocarbons in total aromatics increases by 4% over 5% Mg/USY molecular sieve.The 1% Co-5% Mg/USY is more helpful to the deoxidation of phenols to aromatics.

吴承辉(1996-),男,硕士研究生,研究方向为树皮煤的催化热解特性及产物组成,1243896712@qq.com