http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Fatemeh Zakeri (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Zakeri Fatemeh,Vosoughi Mahsa,Maghsoudi Hafez,Denayer Joeri F. M. 한국화학공학회 2024 Korean Journal of Chemical Engineering Vol.41 No.4
Microporous titanosilicate ETS-4 zeotype membrane, with its 4 Å pore openings, is an adequate material for the kinetic separation of nitrogen from methane. Obtaining high N 2 /CH 4 permselectivity, small-sized ETS-4 powder was synthesized by aging method, and then utilized as membrane seeding powder. Highly N 2 -selective ETS-4 membranes were fabricated utilizing a new recipe and the secondary growth approach on α-alumina supports. XRD, FESEM, and EDX studies were used to analyze the synthesized ETS-4 powder and membranes. The eff ect of membrane activation temperature (80–140 °C) on permeance of N 2 was evaluated. In addition to N 2 and CH 4 , the membrane permeance was also evaluated for O 2 and Ar gases. Regarding the ETS-4 membranes, N 2 permeance increased gradually as the activation temperature was raised in the 80–140 °C range, reaching its highest value (i.e., 2.6 × 10 −8 mol m −2 s −1 Pa −1 ) after activation at 140 °C. The permeances of N 2 and CH 4 gases were measured at 30, 50, and 70 °C, and a pressure diff erence up to 600 kPa. N 2 /CH 4 permselectivity of 75.19 (N 2 permeance of 1.94 × 10 –8 mol m- 2 s −1 Pa −1 ) were obtained at 30 °C and 200 kPa of feed pressure. The results revealed that ETS-4 membranes have great potential for N 2 removal from natural gas due to highest N 2 /CH 4 permselectivity among the other membranes.
-
Alireza Khataee,Arezoo Fazli,Fatemeh Zakeri,Sang Woo Joo 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.89 No.-
Herein, a Z-scheme 2D/2D WO3@CoFe-LDH nanocomposite was synthesized and characterized by XRD,FT-IR, SEM, TEM, EDX, X-ray dot mapping, BET, PL, DRS, and XPS analysis. The integration of the sosynthesizedWO3@CoFe-LDH nanocomposite, ultrasonic, and ozone inferred the existence of a synergyfactor of 2.26 > 1 and 2.17 > 1 for the removal of Acid blue 9 and Acid Orange 7, respectively. Catalystdosage of 1 g/L, the solution pH of 8, the mixture dye concentration of 50 mg/L, and the ozoneflow rate of3 L/h were determined to be the optimum value for the extreme degradation of the dye mixtures under100 min of the sonocatalytic ozonation process. Additionally, the reusability experiments showed thatthe DE was above 80% after 5 times reuse of WO3@CoFe-LDH nanocomposite implying its retainedproperties during the sonocatalytic ozonation process. The contributed active radicals in the degradationof the dye mixtures were profoundly studied and reported to be mainly OH and O2. The so-generatedintermediates were recognized using GCMS analysis and a postulated degradation mechanism wasreported for each of the target pollutants in the presence of WO3@CoFe-LDH nanocomposite. The toxicitytests proved a nontoxic media after the sonocatalytic ozonation of the mixture dyes due to the successiveattack of the reactive oxygen species to the intermediates.
-
Hossein Akhi,Vahid Vatanpour,Fatemeh Zakeri,Alireza Khataee 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.104 No.-
In this research, the modification of emulsion polyvinyl chloride (EPVC) filtration membranes was evaluatedby incorporating tungsten trioxide (WO3) nanosheets. The WO3 nanosheets at five different percentageswere blended with the polymeric casting solution to prepare flat sheet membranes via thephase separation method. The prepared nanocomposite membranes were characterized by SEM, AFM,ATR, mean pore radius, porosity, and contact angle measurements. The investigated parameters werewater flux, rejecting protein and three dyes, antifouling ability, long-term test and reuse ability. Theobtained results showed that adding an optimal amount of WO3 (1 wt%) enhanced water flux and dyerejection. The nanocomposite membranes presented a lower contact angle due to the hydrophilicity ofinserted WO3 nanosheets. The water permeability increased from 191 L/m2h.bar for the bare membraneto 238.8 L/m2h.bar for 1 wt% WO3 EPVC membrane with 96.6, 95.4 and 57.5% rejection rates for ReactiveGreen 19, Reactive Red 195 and Reactive Yellow 39 solutions with molecular weights of 1419, 1136.31and 699.2 g/mole, respectively. The long-term test and reuse ability performance showed that the dyerejection did not change sensibly and good resistance was observed against the flux reduction. In conclusion,WO3 can be applied as a suitable nanosheet to modify PVC membranes.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
