MoO3对Ni/Sepiolite加氢催化剂的改性研究

来源 :天然气化学 | 被引量 : 0次 | 上传用户:lyh555
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
用浸渍法制备了一系列镍基催化剂并以苯加氢反应及二硫化碳中毒为手段考查了MoO3对Ni基催化剂的改性机制.结果表明,钼的加入能增加Ni催化剂的催化活性和抗二硫化碳毒性,原因是钼的加入增加了催化剂的活性中心数量和镍的分散度,改变了催化剂与反应物所形成中间体的活化焓及熵.根据过渡态理论,钼对Ni基催化剂的影响即有电子效应又有几何效应,但以电子效应为主.
其他文献
应用KSV LB-5000型Langmuir膜天平的VISCOS模式,对硬脂酸和19,21-二炔廿二碳酸(DDA)单分子膜在有无亚相离子、不同目标膜压、不同膜障振动频率和不同温度下的动态稳定性作了
研究了四苯基卟啉 (H2 TPP)及其金属配合物 (AgTPP和MgTPP)在AgBr胶体上的表面增强喇曼光谱 (SERS)。SERS光谱表明 ,吸附在AgBr胶体粒子表面的MgTPP和H2 TPP分子分别发生银离
AIM To evaluate antihepatoma effect ofantisense phosphorothioate oligodeo-xyribonucleotides (S-ODNs) targeted to alpha-fetoprotein (AFP) genes in vitro and in n
Fractions of a water insoluble α-(1→3)-D-glucan (GL) extracted from Ganoderma lucidum were carboxymethylated (CM) to obtain water-soluble carboxymethylated de
用低压化学气相沉积法制备TiO2薄膜.研究表明,水的分压、沉积温度、基片材料均对沉积速率有影响.在硅片上镀膜,沉积温度相同而退火温度不同,则薄膜结构亦不同.当退火温度高于
Many systems can display a very short, rapid change stage (quasi-discontinuous region) inside a relatively very long and slow change process. A quantitative def
The syntheses of Keggin and Dawson-structural phospho-tungsto heteropoly compounds and their Peroxo-derivatives(PCWP), and the catalytic performance over this s
An algorithm for the biochemical imaging of heterogeneity in the bio-tissue with finite parallel-plane geometry simultaneously using the data of reflectance and