Sharif Digital Repository

In this study, a batch microprocess was developed for the adsorption of ethanethiol from petroleum gas (LPG), liquefied at −45 °C. This process involved microdevices with ZSM-5 zeolite covalently immobilized on the walls of the microchannels. The results indicated the effective removal of the thiol from the liquefied synthetic feed using the microprocess at short contact times. For instance, the thiol concentration of less than 0.005 mg EtSH/g feed was achieved at a contact time of 3 min for the initial thiol concentration of 0.5 mg EtSH/g feed. The ability of the microprocess to remove the thiol from LPG was investigated at different contact times, surface-to-volume ratios of microchannels,... 

For the first time, Dysprosium was extracted by the novel method of emulsion liquid membrane in a pulsed packed column in a continuous process. Emulsion liquid membrane (ELM) was comprised of D2EHPA (di-2-ethylhexylphosphoric acid) as carrier and Span 80 (Polysorbate 80) as the surfactant in kerosene as the diluent and nitric acid as internal phase. In this work, the packed column was characterized from a hydrodynamic point of view including flooding condition and holdup at flooding points. Operational parameters affecting the flooding points, such as pulsation intensity and flow rate of continuous and dispersed phases have been studied. It was found that increase in pulsation intensity up... 

Most of the strategies yet implemented to optimal fuel loading pattern design in nuclear power reactors, are based on maximizing the core effective multiplication factor (Keff) to extract maximum energy and lowering the local power peaking factor (Pq) from a predetermined value. However, a new optimization criterion could be of interest, aiming at maximum burn-up of the plutonium content in fuel assemblies, i.e., minimization of remaining plutonium in spent fuel at the end of cycle (EOC). In this research, we developed a new strategy for optimal fuel core loading pattern of a VVER-1000 reactor, based on multi-objective optimization: lowering the Pq, maximization of the Keff and minimization... 

Most of the strategies yet implemented to optimize fuel loading pattern design in the nuclear power reactors, are based on maximizing the core effective multiplication factor (Keff) in order to extract maximum energy and to reduce the local power peaking factor (Pq) from a set value. However, a new optimization criterion would be of interest in order to maximize the burn-up of the plutonium content (Pu) in the fuel assemblies. In this research we have developed a new strategy based on multi objective optimization, to optimize fuel core loading pattern for a VVER-1000 reactor. In this approach we simultaneously have reduced the Pq, maximized Keff and also minimized the plutonium content in... 

The liquid-liquid extraction method has been one of the most critical chemical engineering processes for many years. The combination of liquid-liquid extraction and microfluidic systems constitutes a significant advancement in this process in recent years. The inherent advantages of microfluidic systems, due to their micro dimensions and the widespread application of liquid-liquid extraction, have made this process more applicable in various industries. This article focuses on microfluidic systems, discussing the effects of changes and modifications made to the main channel of these systems, as well as the resulting improvements in flow type and channel shape, and their applications. The... 

Galbanic acid (GBA), as a natural compound has potential anticancer properties. It has been documented that GBA shows promising therapeutic potential against various types of cancer, including breast, lung, colon, liver, and prostate cancer. Several mechanisms involve im anti-tumor effects of GBA include apoptosis induction, cell cycle arrest, inhibition of angiogenesis, suppression of metastasis, and modulation of immune responses. Furthermore, the synergistic effects of GBA along with chemotherapeutic agents led to has enhancing efficiency with reduction in toxicity. Moreover, GBA through antioxidant and anti-inflammatory properties possess indirect anti-tumor effects. In this review, we...