La_(1-x)Pr_xNiO_3的制备及其对蔗渣高压液化的催化性能  

Preparation of La_(1-x)Pr_xNiO_3 and Its Catalytic Properties on Bagasse High-pressure Liquefaction

作　　者：张晓华[1,2] 滕俊江[2] 张荣斌[1] 李凝[2] 芦超[2] 高新航[2] 

机构地区：[1]南昌大学化学学院,江西南昌330031 [2]广东石油化工学院化学工程学院,广东茂名525000

出　　处：《生物质化学工程》2015年第5期11-16,共6页Biomass Chemical Engineering

基　　金：广东省人才引进项目(粤财教[2013]247号)

摘　　要：采用共沉淀法制备了钙钛矿型复合氧化物催化剂La1-xPrxNi O3,用X射线衍射(XRD)、扫描电子显微镜(SEM)、程序升温还原(TPR)等对La1-xPrxNi O3的晶相结构、形貌、还原性能等进行了表征;同时考察了La1-xPrxNi O3在催化蔗渣高压液化的反应中催化活性和液化产物分布规律。结果表明,Pr3+部分取代La3+后La1-xPrxNi O3的X射线衍射峰强度增强,微观形貌结构更疏松,比表面积增大,还原峰都向高温方向迁移且还原峰面积增加,具有较好的催化活性,促进蔗渣的液化,降低残渣含量。当复配系数x=0时,残渣率为30.8%,液化油产率为41.67%;当x=1时,残渣率为24.8%,液化油产率为46.37%。同时液化产物中大相对分子质量的产物数量减少,小相对分子质量的产物数量增多。Perovskite-type oxide catalysts La1-xPrx NiO3 were synthesized by co-precipitation method, and the crystalline structures, shapes and reducing properties were characterized by XRD, SEM and TPR. At the same time, the catalytic performance of La1-xPrx NiO3 on bagasse high-pressure liquefaction reaction and liquefaction product distributions in the process were studied. The results showed that after La^3＋ partly replaced Pr^3＋ , the peak strength of XRD of La1-xPrx NiO3 enhanced, the micro morphology structure was more loose, the specific surface area by increased, the reduction peak migrated to the direction of high temperature, and the reduction peak area increased. It showed better catalytic activity, promoted the liquefaction of bagasse and reduced the content of residue. When x =0, the residue rate was 30. 8%, and the yield of liquefied oil was 41.67%. When x = 1, the residue rate was 24. 8%, and the yield of liquefied oil was 46. 37%. At the same time, the product of large relative molecular mass in liquefied products decreased and the product of small relative molecular mass increased.

关 键 词：钙钛矿 La1-xPrxNiO3 生物质 液化 

分 类 号：O643.36[理学—物理化学] TQ353[理学—化学]