Asian Pac J Cancer Prev, 15 (17), [7055][7056][7057][7058][7059]
IntroductionIncrease in prevalence of cancer cases has been associated with the expansion of industrial, chemical and radioactive pollutants, also the gap between human being and nature (Colditz and Wei, 2012; Fasinu and Orisakwe, 2013). Despite the progress in the field of medicinal chemistry and development in the synthesis of several new therapeutic compounds, the role of plants and phytochemicals can not be ignored in pharmaceutical sciences (Cerella et al., 2014). Due to the presence of compounds with cytotoxic and anti-tumor activity in some plants and significant efficacy of plant derived compounds in inhibition and treatment of cancer, as well as the amazing diversity of natural compounds in plants, researches to find new phytochemicals and to evaluate their biological effects is essential and a research priority (Tayarani-Najaran et al., 2011;Wegiera et al., 2012;Sehitoglu et al., 2014).Artemisia is a genus belonging to the family Asteraceae Compositae with commonly fragrant species. Some species such as A. dracunculus L. are kitchen plants and used for
In
this research, three suitable alkanolamine solutions are selected
for sweetening a natural gas with high H2S content and
low CO2/H2S ratio. For each process, six different
CO2 fractions in the regenerated solution are selected.
On the basis of each CO2 fraction in the regenerated solution,
the three processes are designed and simulated using the Aspen HYSYS
process simulator to rich pipeline specifications (i.e., H2S content lower than 4 ppm and CO2 content lower than
2 mol %) for the sweet gas. The results of simulation are then economically
evaluated using Aspen Economic Evaluation software. The results of
simulation and economic evaluation indicate that the diglycolamine
(DGA) process is more economical compared to monoethanolamine (MEA)
and mixed methyldiethanolamine (MDEA) + MEA processes. Also, it is
concluded that there are several advantages in operating the alkanolamine
sweetening processes at higher CO2 fractions of the regenerated
amine. On the basis of the results of this study, lower total capital
costs, lower annual operating costs, and lower energy requirements
for regeneration of the solution are obtainable by operating the alkanolamine
sweetening processes at higher fractions of CO2 in the
regenerated solution.
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