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strength of the protons [ 34 ]. Apart from the Si/Al ratio, the pore structure also plays an important role in the catalytic activity. Mean pore diameter values for H-Y, H-ZSM-5 and H- beta zeolites are 7.4, 5.5 and 6.7 Å, in order [ 35 ], which are much

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, Kasuga , T , Sugiyama , T , Asaga , K , Daimon , M . Influence of superplasticizers on the hydration of cement and the pore structure of hardened cement . Cem Concr Res . 2006 ; 36 : 2049 – 2053 . 10.1016/j.cemconres.2006

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. 31. Wang , CC , Juang , LC , Lee , CK , Hsu , TC , Lee , JF , Chao , HP 2004 Effects of exchanged surfactant cations on the pore structure and adsorption characteristics of montmorillonite . J Colloid Interface

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. 2. Hooton , RD . Permeability and pore structure of cement pastes containing fly ash, slag, and silica fume Frohnsdorff , G , eds. Blended cements, ASTM STP 897 . Philadelphia : American Society for Testing and

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effectively part of the skeletal framework, which reduces the effective density of the gel and reduces the accessible pore volume. Therefore, the distribution and interconnectivity of the pore structure, the short-range ordering of the gel phase, and the

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Journal of Thermal Analysis and Calorimetry
Authors: D. Sternik, M. Majdan, A. Deryło-Marczewska, G. Żukociński, A. Gładysz-Płaska, V. M. Gun'ko, and S. V. Mikhalovsky

( Table 1 ) suggest mesoporous character of pore structure. Small adsorption over the range of low relative pressures confirms small contribution of microporosity ( Table 1 ). High increase of adsorption for relative pressures over 0.8 corresponds to

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. Chen , Q , He , R , Xu , X , Liang , Z , Chen , C . 2004 . Experimental study on pore structure and apparent kinetic parameters of char combustion in kinetics-controlled regime . Energy Fuels . 18 : 1562 – 1568 10.1021/ef0499269

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], bentonites [ 20 , 21 ], montmorillonites [ 15 , 18 , 22 ], zeolites [ 23 , 24 ], and sepiolites [ 25 , 26 ] have been reported for the removal of heavy metal ions from aqueous solutions. The chemical composition and pore structure of the clays usually

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phases [ 43 ] (non polar fuel and polar acetic acid), here, in acetic acid, sulfide and H 2 O 2 are miscible and form one liquid phase, and Amberlyst 15 remains as a solid phase. The Amberlyst 15 has a macro reticular pore structure, which makes the

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, the reactive surface is the key parameter that controls the kinetic. At lower conversion, as carbon conversion increases, many of the pore structure of semi-coke particles will be enlarged by the reaction with steam, and so the reactivity increases

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