不同碳源对CuZnAl-LDO/纳米碳催化剂催化合成气制低碳醇的影响  

Effect of different carbon sources on CuZnAl-LDO/nanocarbons catalysts for synthesis of higher alcohols from syngas

作　　者：张赛 高志华[1] 白楠 黄伟[1,2] ZHANG Sai;GAO Zhi-hua;BAI Nan;HUANG Wei(Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province,Taiyuan University of Technology,Taiyuan 030024,China;Coal Conversion Technology and Engineering Co.,Ltd.,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学煤科学与技术教育部和山西省重点实验室,山西太原030024 [2]太原理工大学山西太原理工煤转化技术工程有限公司,山西太原030024

出　　处：《天然气化工—C1化学与化工》2020年第6期19-24,47,共7页Natural Gas Chemical Industry

基　　金：国家自然科学基金项目(21336006);山西省自然科学基金项目(201601D011021、201601D202017)资助。

摘　　要：采用共沉淀法制备了CuZnAl类水滑石与纳米碳复合前驱体,将其焙烧后获得催化剂,并利用XRD、XPS、SEM-EDS、H2-TPR和NH3-TPD-MS等方法对催化剂的结构进行了表征。在固定床反应器上测试催化剂的性能,考察了不同碳源对催化剂催化合成气制低碳醇(C2+OH)性能的影响。研究发现,碳源的加入会降低催化剂中Cu物种的还原温度,减小Cu晶粒尺寸,提高催化剂中Cu^0的占比,同时增加了催化剂表面的中强酸量。β-环糊精作为碳源时,表现出优异的催化性能,总醇的选择性以及C2+OH占总醇比例分别达到40.77%和24.65%。The composite precursors of CuZnAl hydrotalcite and nanocarbons were prepared by co-precipitation method,which were further calcined to prepare catalysts.The catalysts were characterized by XRD,XPS,SEM-EDS,H2-TPR and NH3-TPD-MS.The performances of the catalysts were tested in a fixed bed reactor to investigate the effects of different carbon sources on the catalytic behaviour of catalyst for synthesis of higher alcohols(C2+OH)from syngas.It was found that the addition of carbon source could reduce the reduction temperature of Cu species,decrease the grain size of Cu,increase the proportion of Cu0 in the catalyst,and increase the amount of medium strong acid on the surface of the catalyst.When β-cyclodextrin was used as carbon source,the selectivity of total alcohol and the proportion of C2+OH in total alcohol were 40.77%and 24.65%,respectively.

关 键 词：纳米碳 CuZnAl类水滑石 合成气 C2+OH 

分 类 号：O643.3[理学—物理化学] TQ426[理学—化学]