Co、Mg改性USY对树皮煤热解焦油产物分布的影响  

Effects of Co and Mg modified USY on tar product distribution of bark coal pyrolysis

作　　者：吴承辉 杜美利[1] 程序 艾庆腾 张悦 林鹏程 WU Cheng-hui;DU Mei-li;CHENG Xu;AI Qing-teng;ZHANG Yue;LIN Peng-cheng(Key Laboratory of Coal Resources Exploration and Comprehensive Utilization,The Ministry of Land and Resources,College of Chemistry and Chemical Engincering,Xi'an University of Science and Technology,Xian 710054,China)

机构地区：[1]西安科技大学化学与化工学院,国土资源部煤炭资源勘查与综合利用重点实验室,陕西西安710054

出　　处：《现代化工》2021年第1期108-112,共5页Modern Chemical Industry

基　　金：国家自然科学基金资助项目(41672154)。

摘　　要：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.

关 键 词：树皮煤 分子筛 催化热解 芳烃 

分 类 号：TQ53[化学工程—煤化学工程]