飞灰基HZSM-5催化松木热解选择性制备芳烃  

Selective Preparation of Aromatic Hydrocarbons by Catalytic Pyrolysis of Pine Wood with Fly Ash-Based HZSM-5

作　　者：张成博 罗希 屈庆熙 牛琦 颜丹 周秋红 李凯[1] 陆强[1] ZHANG Chengbo;LUO Xi;QU Qingxi;NIU Qi;YAN Dan;ZHOU Qiuhong;LI Kai;LU Qiang(National Engineering Research Center of New Energy Power Generation,North China Electric Power University,Beijing 102206,China;Changjiang Institute of Survey,Planning,Design and Research Co.Ltd.,Wuhan 430010,China)

机构地区：[1]华北电力大学,新能源发电国家工程研究中心,北京102206 [2]长江勘测规划设计研究有限责任公司,武汉430010

出　　处：《新能源进展》2024年第4期365-372,共8页Advances in New and Renewable Energy

基　　金：国家自然科学基金项目(52276189,52276188);国家资助博士后研究人员计划项目(GZC20230788);中央高校基本业务费资助项目(2023JC009,2019JG002)。

摘　　要：以飞灰为原料,采用酸洗与碱熔联合预处理耦合水热法制备了飞灰基HZSM-5(FA-HZSM-5)催化剂,并应用于松木催化热解制备芳烃的研究。系统考察了FA-HZSM-5制备过程中盐酸溶液浓度、碱灰比等预处理参数对FA-HZSM-5理化特性的影响,揭示了催化剂制备条件和热解过程参数对芳烃选择性生成的调控机制。结果表明,与商业HZSM-5相比,FA-HZSM-5具有较大的孔结构以及温和的酸强度,有利于单环芳烃(MAHs)的生成,并大幅降低多环芳烃(PAHs)的产率。当盐酸浓度为10%、碱灰比为1.5、热解温度为650℃、催化剂/松木比为20时,芳烃产率达到最大值10.82%。其中,MAHs产率为7.65%,PAHs产率为3.17%,相较于商业HZSM-5,PAHs产率降低了26.11%。Fly ash was utilized as a raw material to prepare fly ash-based HZSM-5(FA-HZSM-5)catalysts by acid washing and alkali fusion pretreatment coupled with hydrothermal method.The catalysts were then applied to the catalytic pyrolysis of pine wood for the production of aromatics.The effects of pretreatment parameters such as hydrochloric acid concentrations and alkali/ash ratios on the physicochemical properties of FA-HZSM-5 were systematically investigated.Furthermore,the regulatory mechanisms of catalyst preparation conditions and pyrolysis process parameters on the selective preparation of aromatics were revealed.The results show that FA-HZSM-5 possessed a larger pore structure and mild acid strength than commercial HZSM-5.These characteristics were conducive to generating monocyclic aromatic hydrocarbons(MAHs)while significantly reducing the yields of polycyclic aromatic hydrocarbons(PAHs).When the hydrochloric acid concentration was 10%,the alkali/ash ratio was 1.5,the pyrolysis temperature was 650°C,and the catalyst/pine ratio was 20,the maximum aromatics yield reached 10.82%.Among these,the MAHs yield was 7.65%,and the PAHs yield was 3.17%,reduced by 26.11%compared to the yield from catalytic pyrolysis using commercial HZSM-5.

关 键 词：飞灰 HZSM-5 热解 单环芳烃 

分 类 号：TK6[动力工程及工程热物理—生物能]