共查询到20条相似文献,搜索用时 15 毫秒
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M. M. Dubinin K. M. Nikolaev N. S. Polyakov N. V. Yakovlev 《Russian Chemical Bulletin》1978,27(8):1509-1513
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N. A. Derachits M. L. Gubkina K. M. Nikolaev N. S. Polyakov 《Russian Chemical Bulletin》1997,46(10):1683-1685
Examination of the adsorption isotherm equation derived from the theory of volume filling of micropores (TVFM) showed that the region of low pressures of experimental isotherms is not always described by this equation. A method for describing the initial region of adsorption isotherms using the parameters of TVFM was proposed. 相似文献
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Suk Yong Jung Jung Mo Moon Soo Chool Lee Sang Cheol Paik Ki Soo Park Jae Chang Kim 《Adsorption》2014,20(2-3):341-348
Dimethyl disulfide (DMDS) and dimethyl sulfide (DMS) are non-polar, stable, organic sulfur compounds found in liquefied petroleum gas, and their oxidation in the atmosphere results in the formation of tropospheric sulfur dioxide, which is subsequently converted into sulfuric acid, as the main factor of acid rain. In the present study, adsorption processes were devised based on the use of modified zeolite impregnated with rare-earth metals (Ce, La or Pr) for the adsorption of DMDS and DMS, and their sorption capacities were compared with that of commercial zeolite [Zeolite-Y, Ultra Stable Y(USY)]. The adsorption capacities of adsorbents were tested using a micro liquid flow reactor at room temperature. USY impregnated with cerium oxide (UC-10) had excellent DMDS and DMS adsorption capacities as compared with the other adsorbents tested. It was found that impregnation of USY with rare-earth metal such as Ce improved the sulfur adsorption capacity of zeolite. The form of the Ce promoter impregnated into USY was determined by FT-Raman spectroscopy. Adsorbents were characterized by X-ray fluorescence spectrometer, X-ray diffraction, and BET and the results obtained are discussed. 相似文献
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R. Sh. Vartapetyan A. M. Voloshchuk M. M. Dubinin L. A. Chekulina S. G. Chepurnoi 《Russian Chemical Bulletin》1986,35(11):2201-2205
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R. Sh. Vartapetyan A. M. Voloshchuk M. M. Dubinin T. A. Moskovskaya 《Russian Chemical Bulletin》1988,37(7):1299-1303
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M. M. Dubinin O. Kadlets L. I. Kataeva B. A. Onusaitis 《Russian Chemical Bulletin》1988,37(5):849-854
1. | The adsorption properties with respect to benzene vapors and the pore structure of carbon adsorbents with almost maximum development of the microporosity were studied. |
2. | The position of the micropore volume distribution curves whose maxima correspond to a size (halfwidth) of 1.2–1.4 nm and micropore volumes 1.5 cm3/g is a characteristic feature of the adsorbents studied. The difference between ordinary active carbons and the active carbons investigated is only quantitative in the values of the parameters of the Dubinin-Stockley adsorption equation. |
3. | The adsorption isotherms are described by the adsorption equation from the theory of volume filling of micropores in a wide range of equilibrium relative pressures and temperatures of 293–353 K with totally satisfactory precision. |
4. | The question of the upper limit of the micropores of carbon adsorbents is discussed. |
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M. M. Dubinin K. M. Nikolaev N. S. Polyakov G. L. Pirozhkov 《Russian Chemical Bulletin》1980,29(8):1211-1214
Conclusions It has been shown that the mathematical apparatus developed earlier for studying the adsorption of readily adsorbable vapors can be used to estimate the dynamic characteristics of the sorption of ethyl chloride vapors through an equation involving a correction coefficient.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1728–1731, August, 1980. 相似文献
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V. Yu. Anikin N. N. Basargin O. V. Tarasova Yu. G. Rozovskii 《Russian Journal of Inorganic Chemistry》2009,54(9):1507-1511
Optimal conditions for strontium(II) sorption by new complexing polymeric sorbents (CPSs) from aqueous solutions were studied,
namely, optimal solution acidity (pHopt), pH of 50% sorption (pH50), and optimal time and temperature of quantitative sorption. The strontium(II) sorption capacities of the test sorbents (SCSs)
were determined, and sorption isotherms were plotted. The strontium(II) sorption parameters determined were used to recognize
the most efficient CPSs. 相似文献
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Herdes C Valente A Lin Z Rocha J Coutinho JA Medina F Vega LF 《Langmuir : the ACS journal of surfaces and colloids》2007,23(13):7299-7305
Results concerning the adsorption capacity of aluminum methylphosphonate polymorph alpha (AlMePO-alpha) for pure ethyl chloride and vinyl chloride by measured individual adsorption isotherms of these pure compounds are presented and discussed here. The experimental data supports the idea of using these materials as selective adsorbents for separating these compounds in mixtures. To explore this possibility further, we have performed grand canonical Monte Carlo simulations using a recently proposed molecular simulation framework for gas adsorption on AlMePO, and the results are presented here. The molecular model of the material was used in a purely transferable manner from a previous work (Herdes, C.; Lin, Z.; Valente, A.; Coutinho, J. A. P.; Vega, L. F. Langmuir 2006, 22, 3097). Regarding the molecular model of the fluids, an existing model for ethyl chloride was improved to capture the experimental dipole value better; an equivalent force field for the vinyl chloride molecule was also developed for simulation purposes. Simulations of the pure compounds were found to be in excellent agreement with the measured experimental data at the three studied temperatures. Simulations were also carried out in a purely predictive manner as a tool to find the optimal conditions for the selective adsorption of these compounds prior experimental measurements are carried out. The influence of the temperature and the bulk composition on the adsorption selectivity was also investigated. Results support the use of AlMePO-alpha as an appropriate adsorbent for the purification process of vinyl chloride, upholding the selective adsorption of ethyl chloride. 相似文献
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V. V. Samonin V. Yu. Nikonova E. A. Spiridonova 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2007,81(8):1271-1275
The preliminary adsorption of water considerably decreased the sorption capacity of fullerene-containing materials with respect to benzene. The effect grew stronger as the content of fullerenes in the adsorbent increased. The possibility of increasing adsorption capacity by treatment with water was studied. The dependence of the sorption capacity of fullerene materials with respect to benzene on the relative water vapor pressure and the sorption capacity with respect to water at the preadsorption stage was determined. 相似文献
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