Ca1-xPrxFeO3催化热解甘蔗渣木质素制备酚类化合物  

Production of Phenolic Compounds from Bagasse Lignin via Catalytic Pyrolysis of Ca1-xPrxFeO3

作　　者：韩洪晶 葛芹 陈彦广 王海英 赵宏志 王怡真 张亚男 邓冀童 宋华 张梅 HAN Hongjing;GE Qin;CHEN Yanguang;WANG Haiying;ZHAO Hongzhi;WANG Yizhen;ZHANG Yanan;DENG Jitong;SONG Hua;ZHANG Mei(College of Chemistry&Chemical Engineering,Provincial Key Laboratory of Oil&Gas Chemical Technology,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学化学化工学院石油与天然气化工省重点实验室

出　　处：《高等学校化学学报》2020年第2期331-340,共10页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:51674089,21908021);黑龙江省杰出青年基金(批准号:JC2018002);黑龙江省教育厅规划课题青年专项(批准号:GJD1215064);东北石油大学青年基金(批准号:2018QNL-17)资助~~

摘　　要：采用溶胶-凝胶法合成了一系列镨掺杂的铁酸钙氧化物(Ca1-xPrxFeO3,简称CPF-x),优化了其焙烧机制,研究了其对甘蔗渣木质素(BL)的催化热解作用,考察了其再生性能。研究结果表明,CPF-x适宜的合成及焙烧参数分别为:x=0. 5,焙烧温度为800℃,焙烧时间为6 h,在该条件下得到的CPF-0. 5-800-6呈立方晶相,为疏松多孔结构;掺杂Pr后,其比表面积提高了近3倍。CPF-0. 5-800-6对BL催化热解最佳工艺参数为:m(CPF-0. 5-800-6)∶m(BL)=1∶3,热解温度为650℃,液相收率最大可达20. 73%,其中主要产物为紫丁香酚类、苯酚类及愈创木酚类,其总选择性为63. 21%。以CPF-0. 5-800-6为催化剂,紫丁香酚类化合物选择性由20. 60%增大到29. 59%,实现了提高BL催化热解中某种单酚化合物的选择性。CPF-0. 5-800-6经5次催化热解-再生循环反应后,仍具有良好的反应活性和结构稳定性。A series of calcium ferrite oxides with different loading of praseodymium( Ca1-xPrxFeO3,CPF-x)was synthesized by sol-gel method. The calcination mechanism was optimized,its catalytic pyrolysis effect on bagasse lignin( BL) was evaluated,and its regeneration performance was investigated. The results showed that the suitable synthesis and calcination parameters of CPF-x were as follows: x = 0. 5, the calcination temperature was 800 ℃,and the calcination time was 6 h. The CPF-0. 5-800-6 obtained under this condition presented cubic crystal phase,porous structure,and the specific surface area increased by nearly 3 times with the addition of Pr into CaFeO3. The optimal technological parameters for catalytic pyrolysis of BL by CPF-0. 5-800-6 were as follows: m( CPF-0. 5-800-6) ∶ m( BL) was 1 ∶ 3,the pyrolysis temperature was 650 ℃,and the liquid phase yield was up to 20. 73%. The main phenolic compounds are syringols,phenolics and guaiacols typed compounds. The total selectivity was 63. 21%. The selectivity of syringols increased from 20. 60% to 29. 59% with CPF-0. 5-800-6 as catalyst. The selectivity of a certain phenol compound in BL catalytic pyrolysis was improved. CPF-0. 5-800-6 still has nice selectivity and structural stability even after 5 catalytic pyrolysis and regeneration cycles.

关 键 词：紫丁香 酚类化合物 甘蔗渣木质素 溶胶-凝胶法 钙钛矿 催化热解 镨掺杂的铁酸钙氧化物 

分 类 号：O643[理学—物理化学]