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成出管状纳米炭纤维. 关键词:纳米炭纤维; 催化剂载体; 气相化学沉积; 控制合成; Carbon nanofiber; Catalyst support; Chemical vapor deposition; Synthesis; [全文内容正在添加中] ......
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) of the catalyst and is attributed to high copper content, the mixed sites Cu2+-Fe + and/or Cu+-Fe2+ ion pairs besides the one component sites Cu2+-Cu+, Fe3+-Fe2+, as a result of mutual charge interaction. In other.... Key words: mixed ferrite; spinel; valence induction; catalyst activity; rate constant; lanthanum oxalate 1 Introduction Ferrite is an important class of material that has potential applications......
浮动催化法制备碳管若干影响因素的研究 张迎九1,耿梅艳1,马姗姗1,胡晓阳1,王稳稳1 (1.郑州大学物理工程学院材料物理教育部重点实验室,郑州,450052) 摘要:采用浮动催化法,利用卧式单一高温电阻炉,在以无水乙醇为碳源的反应体系中通过改变催化剂,反应气氛及流量,添加剂等实验参数合成了形貌不一的碳微纳米材料;采用SEM和Raman对产物进行了形貌观察和表征;比较了这些实验参数对浮动催化法制备碳纳米管的影响,并对其作用机理进行了简单分析. 关键词:碳纳米管; 浮动催化法; 液相注入; 有机金属化合物; carbon nanotube; floating catalyst method; liquid injection; organometallic complex; [全文内容正在添加中] ......
铝酸钠溶液沉钒渣中钒的湿法回收冯其明1,邵延海2,欧乐明1,张国范2,卢毅屏2(1.湖南省长沙市中南大学资源加工与生物工程学院2.昆明理工大学 国土资源工程学院,昆明 650093)摘 要:通过沉钒渣物相分析,提出从沉钒渣中回收钒的浸出-净化-铵盐沉钒湿法工艺.结果表明,采用碳酸氢钠浸出沉钒渣,在NaHCO3与Ca3(VO4)2摩尔比为11,反应温度80℃,反应时间45min,固液比1∶4,搅拌速度800r/min条件下,钒的浸出率达96.4%.含钒浸出液中分步添加30%硫酸和硝酸镁,Al,Si,P,As等杂质......
铝含量对焦炉煤气制氢用Cu/ZnO/Al2O3催化剂前驱体协同效应的影响付威1,李谦2,鲍正洪3,丁伟中1,周国治1(1.上海市上海大学上海市现代冶金与材料制备重点实验室2.上海大学上海市现代冶金及材料制备重点实验室,上海 2000723.上海大学 上海市现代冶金及材料制备重点实验室,上海 200072)摘 要:采用并流共沉淀法制备了不同Al含量的Cu/ZnO/Al2O3催化剂(Cu/Zn=1,Al 4~24 mol%),对其进行XRD,DSC和TPR表征,并在焦炉煤气制氢的模拟重整气氛下(H2:CO:CO2=......
SiO_2/PI杂化薄膜; 表面过渡层; 力学性能; base catalyst morphology; nanoporous SiO_2/PI hybrid film; surface transition layer; mechanical properties; [全文内容正在添加中] ......
: oxygen buffering capacity; ligh-off temperature; ceria-based oxygen storage materials; doping; three-way catalyst  ... of oxygen storage/release on millisecond time scale on planar catalyst[J]. Journal of Catalysis, 2002, 211(1): 157?164. [5] ZHAO Min-wei, SHEN Mei-qing, WANG Jun. Effect of surface area and bulk structure......
best soot combustion catalyst could ignite soot combustion even at 350 ℃, which is within the range of temperatures reached in diesel exhaust, and shows the catalytic combustion velocity nearly one time faster compared with non-catalytic combustion of soot, which is of benefit to rapid regeneration of diesel particulate filter, thus it might be an excellent practicable catalyst. Key words:diesel......
Effects of microwave pretreatment on zinc extraction from spent catalyst saturated with zinc acetate ZHANG Ze-biao(张泽彪)1, 2, ZHANG Zheng-yong(张正勇)1, 2, NIU Hao(牛 浩)1, 2, PENG Jin... _____________________________________________________________________________________________________ Abstract: A new technology for microwave pretreatment of spent catalyst on Zn extraction by HCl leaching......