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Seidi Farzad Arabi Shamsabadi Ahmad Ebadi Amooghin Abtin Saeb Mohammad Reza Xiao Huining Jin Yongcan Rezakazemi Mashallah 《Environmental Chemistry Letters》2022,20(2):1083-1128
Environmental Chemistry Letters - The application of natural biopolymers such as polysaccharides for the fabrication of bio-based membranes has recently attracted attention for CO2... 相似文献
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Natural refrigerant ammonia R-717 and synthetic azeotropic refrigerant R-507 (a blend containing 50% R-143a and 5% R-125 by weight) are used in a wide range of refrigeration systems especially in low-temperature applications. R-717 and R-507 are ozone friendly refrigerants, which have no Ozone Depletion Potential (ODP). Global Warming Potential (GWP) of R-717 and R-507 is equal to zero and 3300, respectively. The high amount of R-507 GWP demonstrates its negative effect on the Earth’s climate change. In this study, a refrigerated warehouse located in Cincinnati, Ohio was modeled and the total energy demand and Coefficient of Performance (COP) was evaluated by eQUEST using two scenarios. The R-717 and R-507 were used as refrigerant in the first and second scenarios, respectively. The results showed that using R-717 in the refrigeration system leads to a 15% energy saving and a higher COP compared to R-507 in all working conditions. The only exception is that at an evaporating temperature below ?35°C which COP values of both refrigerants are approximately equal. 相似文献
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Mohammadnejad S Ataei A Nabi Bidhendi GR Mehrdadi N Ebadati F Lotfi F 《Environmental monitoring and assessment》2012,184(5):2709-2728
This study aims to find an appropriate way to minimize water utility in the petrochemical and petroleum industries due to high rate of water consumption. For this purpose, Tehran oil refinery has been well studied. In this research, three key contaminants including suspended solid, hardness as well as COD have been considered to analyze the water network. In addition, the potential of water reuse was studied for all methods. These key contaminants once were analyzed separately as a single contaminant and the amount of required freshwater was calculated for them. In this stage, amount of freshwater was reduced to about 60.9 (17%), 203 (59.7%) and 143 m3/h (42.5%) in terms of suspended solids, hardness, and COD, respectively. Water minimization within operations for suspended solids is less than two others. Therefore, this is a limiting contaminant and can be selected as a key contaminant. In the next stage, three contaminants were analyzed two by two based on their mass transfer. Results show that, in the targeting for minimization based on the suspended solids and hardness, the amount of required water is reduced to 142.74 m3/h or 42%. This amount for suspended solids and COD is equal to 86.3 m3/h (26%) and for COD and hardness is 124 m3/h (37%). Analyzing the methods shows that the method based on the double contaminant gives more precise results rather than single contaminant. 相似文献
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Hossein Ataei 《Journal of Material Cycles and Waste Management》2016,18(4):665-676
Sustainable development has become a major focus for engineers and planners as part of their collective efforts in finding, developing and integrating environmental-friendly solutions for material recycling and waste management into design and construction of civil engineering infrastructure. In the past three decades, there has been an increase in recycling and application of waste materials into the concrete to decrease costs and improve material properties of the concrete. Significant growth in automobile manufacturing industry and increased rubber tire supply for vehicles suggested the application of waste tire particles as concrete aggregates to minimize the ecological footprint of the rubber tire waste due to its recycling process difficulties. In this paper, the effect of rubber tire particles on compressive and dynamic strength of concrete specimens with different particle percentiles was tested on more than 55 cylindrical specimens. To achieve the optimal mix design properties of rubber tire concrete specimens, both fine and coarse aggregates got replaced by fine and coarse rubber particles. Introduction of rubber tire particles as coarse and fine aggregate reduces the brittleness of the concrete and provides more flexible aggregate bonding which ultimately improves the dynamic resistance of the concrete. It increases the concrete workability and provides environmental-friendly and cost-effective solutions in using recycled materials for concrete construction applications. 相似文献
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Shahla Ataei Rosiyah Yahya Seng Neon Gan Aziz Hassan 《Journal of Polymers and the Environment》2012,20(2):507-513
Thermal decomposition kinetics of three palm oleic acid-based alkyds with different oil lengths and having different molecular weights were studied using TGA measurements under non-isothermal conditions. Activation energies were obtained from Kissinger and Ozawa, Flynn and Wall (OFW) methods and subsequently the pre-exponential factor, A, degradation rate constant, k, for all the alkyds were also determined. From kinetic analysis of the thermal decomposition using the OFW method, it was found that degradation of all the alkyds has taken place in more than two stages, corresponding to different mechanisms. As shown from Ozawa and Kissinger methods, the chemical composition of the alkyds influenced the thermal degradation; increasing the phthalic anhydride and glycerol, and decreasing the oleic acid increased the thermal stabilities of the alkyds. 相似文献
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Gholamrezai Saeed Aliabadi Vahid Ataei Pouria 《Environment, Development and Sustainability》2021,23(11):16100-16118
Environment, Development and Sustainability - Despite widespread economic growth and increasing quality of life in the last century, there are concerns that human activities have had a significant... 相似文献
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Ataei Seyed Milad Aghayan Iman Pouresmaeili Mohammad Amin Babaie Meisam Hadadi Farhad 《Environmental science and pollution research international》2022,29(4):5105-5123
Environmental Science and Pollution Research - The drive mode is an important factor that affects the adjustment requirements for emission factors of the conventional simulation methods in... 相似文献
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Shahla Ataei Rosiyah Yahya Seng Neon Gan 《Journal of Polymers and the Environment》2011,19(2):540-545
The kinetic behavior of polyesterification of the alkyd resins synthesized using glycerol and phthalic anhydride modified
with oleic acid from the palm oil at temperatures between 120 and 240 °C was studied. Three alkyds having oleic acid contents
of 28, 40, and 65% were prepared by employing fatty acid method. The extent of the polyesterification reaction and average
degree of polymerization were monitored by determining the acid number of the aliquot of the reaction mixture at various intervals
of time and by measuring the volume of water evolved. Kinetic studies revealed that initial reaction rates followed a second-order
kinetics up to certain limit and thereafter deviations were observed. The extent of reaction varied from 77.4 to 86.3% before
deviation for all the three samples and exhibited a considerable degree of conversion. The second-order rate constants calculated
from the linear part were found to be of the order of 10−5 g (mg KOH)−1 min−1. Molecular weight of the alkyd samples was determined by GPC; number average molecular weight of the alkyds ranged from 980
to 2,070. 相似文献
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