【摘 要】
：
The developed SEMK model is used to provide an insight into the contribution of individual reactions in the cracking of methylcyclohexane as well as the site co
【机 构】
：
Research Institute of Petroleum Processing,Laboratory for Chemical Technology
论文部分内容阅读
The developed SEMK model is used to provide an insight into the contribution of individual reactions in the cracking of methylcyclohexane as well as the site coverage by various carbenium ions. The preferred reaction pathways for the conversion of methylcyclohexane are hydride transfer reactions followed by PCP-isomerizations, deprotonation and en-docyclicβ-scission, accounting for 61%, 22%and 12%of its disappearance, respectively, at 693 K and 30%conversion of methylcyclohexane. Protolysis plays a minor role in the cracking of methylcyclohexane. Once cyclic dioleifns are formed, all of them can be instantaneously transformed to aromatics, which are easily interconverted via disproportionation. Judg-ing from the carbenium ion concentrations it is evident that, at the investigated operating conditions, less than 5%of the acid sites are covered by carbenium ions, less than 2%of which corresponds to cyclic type species including allylic ones.
其他文献
目的 :评价国产丙戊酸钠无糖口服液和进口丙戊酸钠糖浆两种制剂的生物等效性。方法 :2 0例健康男性志愿者双周期随机交叉口服单剂量 10 0 0mg(2 5mL)国产丙戊酸钠无糖口服液
The MoS2 catalysts were prepared from various molybdate precursors including inorganic and organic molybdate compounds. The sulifdation degree and morphology of
Geometric anisotropy is commonly assumed in the investigation of the spatial variations of geophysical parameters. However, this assumption is not always satisf
文章就我国现行税制中,对高科技产业的政策措施作了分析,提出要注重科技产业的特点,鼓励研发投入,在增值税、企业所得税方面要采取相应措施并与其他经济发展目标相配套。
Th
Vuggy reservoirs are the most common, albeit important heterogeneous carbonate reservoirs in China. However, saturation calculations using logging data are not
In this paper three methods (dilute acid pretreatment, aqueous ammonia/dilute acid pretreatment and alkaline pre-treatment) were used to study the hydrolysis of
In this work, Zr-M(M=Cu, Mn, Ce) type sulfur transfer agent was prepared by impregnation method. Under the condition similar to that in the regenerator of FCC u
The friction coefficients between the surfaces of a ball and a disc lubricated by a space lubricating oil No.4129 were measured at various operating conditions
相对还原度是评价铁矿球团冶金性能的一项重要指标。检测该常用标准是ISD72 15 :1995、GB/T132 4 1- 91,但在检测实践中发现 ,同一标准如果掌握或理解不同会使检测结果或多或