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Effect of Calcined Temperature on Coke Deposition for Autothermal Reforming of Methane with Ni-Cu Catalyst
Xiu-lan Caia*,Guang-yan Lia,Wei-ming Linb
Author NameAffiliationE-mail
Xiu-lan Caia* Guangdong Pharmaceutical University, Pharmacy College, Guangzhou 510006, China caixiulan78@126.com 
Guang-yan Lia Guangdong Pharmaceutical University, Pharmacy College, Guangzhou 510006, China  
Wei-ming Linb South China University of Technology, School of Chemistry and Chemical Engineering, Guangzhou 510640, China  
Abstract:
Ni/CuO-ZrO2-CeO2-Al2O3 catalysts were prepared by co-precipitation method at pH=9 and using Na2CO3 as the precipitant. The Ni loading (mass fraction) of the catalysts was 10%. The catalysts were characterized by X-ray diffraction, temperature-programmed oxidation (TPO), scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS). The effects of calcined temperature of support on coke deposition were studied. TPO, SEM and XPS results indicated there was no peak of higher temperature oxygen consumption on Ni/CuO-ZrO2-CeO2-Al2O3catalyst (support was calcined at 800 oC), which could lead to the deactivation of the catalyst. The carbon species were carbonate and inactive carbon (filamentous carbon species) on the surface of catalyst reacting for 40 h which perhaps led to the deactivation of the catalyst.
Key words:  Methane  Autothermal reforming  Hydrogen  Coke deposition
FundProject:
焙烧温度对Ni/CuO-ZrO2-CeO2-Al2O3催化剂在甲烷自热重整反应中积炭行为的影响
蔡秀兰a*,李光炎a,林维明b
摘要:
以Na2CO3为沉淀剂,在pH=9时,采用并流沉淀法制备了Ni/CuO-ZrO2-CeO2-Al2O3催化剂,催化剂中活性组分Ni的负载量(质量分数)为10%.采用TPO、SEM和XPS等方法研究了载体焙烧温度对催化剂积炭行为的影响.结果表明,载体焙烧温度为800 oC制备的Ni/CuO-ZrO2-CeO2-Al2O3催化剂不存在高温烧炭峰,可以避免由于积炭而降低反应的活性.反应40 h后,催化剂表面出现表面碳酸盐和非活性丝状积炭,这些物种可能会导致催化剂活性降低.
关键词:  甲烷  自热重整  制氢  积炭
DOI:10.1063/1674-0068/28/cjcp1411195
分类号: