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Nickel catalysts supported on activated carbon/FSM-16 nanoparticles were prepared by wet impregnation method and tested for vapor phase selective hydrogenation of benzene in the mixture of aromatics as benzene, toluene and xylene. The textural and physico-chemical properties of nickel catalysts were characterized by X-ray diffraction, X-ray fluorescence, Fourier transform infrared spectroscopy, Uv-visible diffuse reflectance spectra, field emission scanning electron micro-scope and nitrogen adsorption-desorption analysis. The catalytic evaluation revealed that the best activity (> 94%) and high selectivity (> 99%) are related to Ni/ACÀ F(50) at 150°C and Ni/ ACÀ F(75) at 130°C and 150°C, respectively. In summary, by calculating the yield of benzene, in order to evaluate the performance (activity, stability, and selectivity) of the catalysts, it was found that the performance of Ni/ACÀ F(75) is very appropriate.

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Introduction: Falls are considered as the major health problem in ageing and the damages caused by falls (such as fractures, disability, heavy costs on government and family, and death) are the major concern of the World Health Organization. So, determination of risk factors and specific ways to prevent falls in the elderlies are of great importance. The aim of this study was to evaluate the effect of a six-week shuttle balance exercises on balance, gait speed, and risk of falling in elderlies. Methods: This ranomised controlled trial study was conducted with the pre-test and post-test design among the elderlies in regions five and six of Tehran, Iran. To conduct the study, 30 healthy men and women older adulth were randomly divided into the experimental (n = 16)  and control (n = 14) groups. Members of the experimental group participated in the six-week exercise program, which was held in three 90-minute sessions per week. The intervention involved five exercises conducted in presence of the researcher. Data were collected using the valid and reliable instruments of Berg Balance Scale, Timed Up and Go Test, and the Falls Efficacy Scale Intrnational. Data were analyzed by independent t-test, paired sample t-test, and analysis of covariance at the significance level of 95 percent using SPSS 19. Results: The study findings showed that balance training with shuttle balance improved the participants' balance, gait speed, and fear of falling significantly (p < 0.05). Conclusion: The six-week balance exercises with shuttle balance improved the participants' walking gait and reduced the risk of falling in elders. These results highlight the beneficial effects of shuttle balance over other devices, such as more security, adjustability of height in chair arms, and possibility to enhance its exercise programs. Therefore, balance shuttle can be applied to improve balance, increase gait speed, and reduce falling risk in elderlies.

CoMo-supported mesoporous catalysts were synthesized by 50 wt% of HZSM-5 and 50 wt% of FSM-16, KIT-6, and MCM-48. These catalysts were prepared by the wet-impregnation method and pre-sulfided with CS2. The catalytic performance was evaluated for HDS reaction of dibenzothiophene over a temperature range of 250-400 °C in a micro fixed-bed reactor under atmospheric pressure. The supported CoMo bimetallic catalysts were characterized by XRD, XRF, FT-IR, N2 adsorption-desorption, and SEM. The CoMo/KIT-6/HZSM-5 indicate higher activity than other catalysts at 400 °C for dibenzothiophene hydrodesulphurization. Also, the best selectivity to cyclohexylbenzene (CHB) is related to CoMo/FSM-16/HZSM-5. The activation energy was also calculated for all prepared catalysts for the conversions of less than 10%; according to which, the activation energy for CoMo/KIT-6/HZSM-5 is less than other catalysts (~21 kJ/mol) which can be related to the appropriate pore size and high surface area of the support. Copyright © 2020 BCREC Group. All rights reserved

Benzene selective hydrogenation has very important due to the need to reduce the carcinogenic effects of benzene as a toxic and volatile compound and production of cyclohexane as a green solvent for the production of nylons. Nickel loaded composites were prepared by the wet‐impregnation method. These catalysts were characterized using Fourier‐transform infrared, X‐ray powder diffraction, scanning electron microscope, and N2 adsorption‐desorption techniques. The aim of this study is to evaluate the catalytic performance as a function of zeolite nature, reaction temperature and relative pressure of the reactants. The obtained results confirm that the nickel nanoparticles supported on Al‐MCF‐Zeolites hybrids have acceptable performance. Also, the best activity and high selectivity were obtained for Ni/Al−M‐MOR at all temperatures (150‐210 °C) and Ni/Al−M‐13X about 83% at 170 °C.

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