Three industrial spent S Zorb sorbents extracted from production line were studied with XRD, TPR-MS and XPS. The characterization results of XPS and TPR-MS identified the existence of amorphous Ni_xS_y on industrial s...Three industrial spent S Zorb sorbents extracted from production line were studied with XRD, TPR-MS and XPS. The characterization results of XPS and TPR-MS identified the existence of amorphous Ni_xS_y on industrial spent S Zorb sorbents, while the existing XRD quantitative analysis methods can only provide the long-range order in phase information and the grain size of Ni metal. XPS is a powerful tool to investigate the chemical states of nickel atom and the depthwise distribution of nickel species on S Zorb sorbent. Ni_xS_y and Ni metal species coexist on the industrial spent sorbents, and their percentages to total nickel slightly change with the operating conditions in the surface layer. It proves that Ni_xS_y is a stable intermediate product rather than a transition state. The information can contribute to the better elucidation of S Zorb desulfurization mechanism and offer a new direction for selectivity optimization of industrial S Zorb sorbents.展开更多
Meeting deliverable deadline is a critical issue for successful organization. Last minute adjustments characterize software development due to many reasons including not testing thoroughly. XP （Practicing Extreme Pro...Meeting deliverable deadline is a critical issue for successful organization. Last minute adjustments characterize software development due to many reasons including not testing thoroughly. XP （Practicing Extreme Programming）, which is an agile software development methodology, gives rise to the issue of pair programming. This paper aims at discussing the strengths and weaknesses of an Extreme Programming methodology by examining the characteristics of the 12 software development practices of the XP methodology. Working together will incur in a highly reliable functionalities to release. Furthermore, moving people around will allow the team to keep track of the whole project.展开更多
基金the funding of the project by SINOPEC(No.114138)
文摘Three industrial spent S Zorb sorbents extracted from production line were studied with XRD, TPR-MS and XPS. The characterization results of XPS and TPR-MS identified the existence of amorphous Ni_xS_y on industrial spent S Zorb sorbents, while the existing XRD quantitative analysis methods can only provide the long-range order in phase information and the grain size of Ni metal. XPS is a powerful tool to investigate the chemical states of nickel atom and the depthwise distribution of nickel species on S Zorb sorbent. Ni_xS_y and Ni metal species coexist on the industrial spent sorbents, and their percentages to total nickel slightly change with the operating conditions in the surface layer. It proves that Ni_xS_y is a stable intermediate product rather than a transition state. The information can contribute to the better elucidation of S Zorb desulfurization mechanism and offer a new direction for selectivity optimization of industrial S Zorb sorbents.
文摘Meeting deliverable deadline is a critical issue for successful organization. Last minute adjustments characterize software development due to many reasons including not testing thoroughly. XP （Practicing Extreme Programming）, which is an agile software development methodology, gives rise to the issue of pair programming. This paper aims at discussing the strengths and weaknesses of an Extreme Programming methodology by examining the characteristics of the 12 software development practices of the XP methodology. Working together will incur in a highly reliable functionalities to release. Furthermore, moving people around will allow the team to keep track of the whole project.
