使用有序介孔二氧化硅分子筛SBA-15 作为载体,通过浸渍法制备了Pd-Re/SBA-15 双组分催化剂,并应用于丙三醇氢解制丙二醇反应中。结果表明,与单组分Pd/SBA-15 或Re/SBA-15 相比较,Re 组分添加后,Pd-Re/SBA-15 催化剂对丙三醇氢解有更高的活性。随着Re 含量的增加,丙三醇的转化率和1,3-丙二醇的选择性逐渐提高,但Re 添加量较多时,1,2-丙二醇的选择性有
以贵金属Pt 为金属组分,MOR+SAPO-11 或ZSM-5+SAPO-11 为酸性载体,采用捏合成型法、混合法和分床层法分别制备三种复合分子筛催化剂。以正庚烷为模型化合物,考察了复合方式对复合分子筛催化剂异构性能的影响。结果表明：复合分子筛中两种分子筛的间距越短,复合效应越明显；复合方式对不同结构类型复合分子筛催化异构性能的影响差异较大。相比于Pt/MOR 催化剂,Pt/MOR+SAPO-11
通过酸碱处理的方式得到了具有多级孔道结构的ZSM-5分子筛，并采用XRD、NH3-TPD、BET等手段对其结构进行表征，结果表明经酸碱处理的ZSM-5分子筛同时具有微孔和介孔结构.用该多级孔ZSM-5、普通ZSM-5和直接合成的多级孔ZSM-5分子筛作为苯、甲醇烷基化反应的催化剂，结果表明，多级孔ZSM-5分子筛对苯、甲醇烷基化反应有更高的催化活性.多级孔ZSM-5分子筛上苯的转化率提高了约10％
将直链烷烃含量达80％之多的F-T 石脑油异构化生产高辛烷值汽油，不仅具有重要的经济意义，同时还对环境保护有重要的意义。由双功能异构化机理可见，酸功能在异构化过程中起着十分重要的作用。通过以不同碳链长度的正构烯烃为探针分子，用ZSM-5、β和Y 三种分子筛作为酸性载体，系统研究了不同分子筛B 酸中心位上的异构化性能差异。同时，采用密度泛函(DFT)方法对模拟的反应过程进行计算，从理论角度对异构化结
The profile study on Mulukanoor Women Dairy Cooperative Society (MWCD) showed that the membership enrollment of 8426 at its establishment in 2002 has been enhanced to 19,616 in 2010-11.A 2.5 fold incr
Intestinal growth is impaired in newborn piglets that have experienced intrauterine growth restriction and remains at a suboptimal rate during the entire suckling period.
The Australian Alpaca industry requires transformation to become a commercially viable industry beyond reliance on fiber as its sole product.Although traditionally farmed for their fleece,a commercial
Classical Swine Fever (CSF) caused by Classical Swine Fever Virus (CSFV) is a highly contagious and hemorrhagic disease of pigs and has caused significant economical losses in the pig industry worldwi
The JAK-STAT pathway controls signal transduction between cell surface receptors and the nucleus and plays a key role in host immunity.The present study was designed to investigate the effect of singl
A model was successfully set up using Chinese Merino with different genotypes artificially infected with Mycoplasma pneumonia.A MBL gene exon 1 polymorphism analysis was made using PCR-SSCP technique