本文研究了Fe(Ⅲ),Co(Ⅱ),Ni(Ⅱ.),Cu(Ⅱ)在5-Br-PADAP-TritonX-100体系中的析相显色反应。利用该体系具有一定选择性和富集、分离的特点,采用多波长K系数法,根据公式ΔA=A-sum from i=1 to n K_iA_i=KC,在一个测定波长和与干扰组分个...本文研究了Fe(Ⅲ),Co(Ⅱ),Ni(Ⅱ.),Cu(Ⅱ)在5-Br-PADAP-TritonX-100体系中的析相显色反应。利用该体系具有一定选择性和富集、分离的特点,采用多波长K系数法,根据公式ΔA=A-sum from i=1 to n K_iA_i=KC,在一个测定波长和与干扰组分个数相等的参比波长下,测定混合多组分体系的吸光度。求得相应K值后,再计算各待测组分含量。本法用于测定人发中微量铁、钴、镍、铜取得了满意结果。展开更多
The influence of adding Fe, Cr, Co, and Ga into 3%Mo/HZSM-5 catalyst on methane aromatization, and the influence of additives ratio on methane conversion, selectivity to hydrocarbons and coke, as well as distribution ...The influence of adding Fe, Cr, Co, and Ga into 3%Mo/HZSM-5 catalyst on methane aromatization, and the influence of additives ratio on methane conversion, selectivity to hydrocarbons and coke, as well as distribution of aromatics were investigated. The experimental results showed that the addition of Fe, Cr, Co and Ga promoted the dehydrogenation and dissociation of methane. The results of NH3-TPD indicated that the acidity of HZSM-5 was changed by adding Fe and Co components, consequently the catalytic properties of Mo/HZSM-5 were changed. It was also revealed that strong acid sites were the center of methane aromatization. The results of XRD characterization showed that the crystallinity of Mo on ZSM-5 zeolite was increased after adding Fe, Co additives.展开更多
文摘本文研究了Fe(Ⅲ),Co(Ⅱ),Ni(Ⅱ.),Cu(Ⅱ)在5-Br-PADAP-TritonX-100体系中的析相显色反应。利用该体系具有一定选择性和富集、分离的特点,采用多波长K系数法,根据公式ΔA=A-sum from i=1 to n K_iA_i=KC,在一个测定波长和与干扰组分个数相等的参比波长下,测定混合多组分体系的吸光度。求得相应K值后,再计算各待测组分含量。本法用于测定人发中微量铁、钴、镍、铜取得了满意结果。
文摘The influence of adding Fe, Cr, Co, and Ga into 3%Mo/HZSM-5 catalyst on methane aromatization, and the influence of additives ratio on methane conversion, selectivity to hydrocarbons and coke, as well as distribution of aromatics were investigated. The experimental results showed that the addition of Fe, Cr, Co and Ga promoted the dehydrogenation and dissociation of methane. The results of NH3-TPD indicated that the acidity of HZSM-5 was changed by adding Fe and Co components, consequently the catalytic properties of Mo/HZSM-5 were changed. It was also revealed that strong acid sites were the center of methane aromatization. The results of XRD characterization showed that the crystallinity of Mo on ZSM-5 zeolite was increased after adding Fe, Co additives.
