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Catalysts 2015, 5 Catalysts 2015, 5 210 2101 the preservation of microporous structures and the presence of additional porosity within the crystals. Beta-0 500 Beta-0 0.10 0.10 0.08 0.08 0.06 0.06 0.04 0.04 0.02 0.02 0.00 0.002 4 6 8 10 12 14 16 18 20 500 Beta-1 Beta-1 Beta-1 Beta-1 400 Beta-3 400 Beta-3 300 300 200 200 100 100 0.0 0.2 0.4 0.4 0.6 0.6 0.8 0.8 1.0 1.0 0.0 0.2 Relative pressure (p/p ) Relative pressure (p/p ) 0 0 2 4 6 8 10 12 14 16 18 20 Sample SBET (m /g) Smic (m /g) b (m2/g) V Sample SBET (m2/g) Smicb (m2/g) 681 Sextb (m2/g) 62 Vmicb (cm3/g) 0.27 Vmesoc (cm3/g) Beta-0 743 0.18 0.29 0.51 0.06 Beta-0 Beta-1 743 814 681 591 62 223 0.27 Beta-1 Beta-2 Beta-2 Beta-3 814 879 591 539 223 340 0.23 Beta-2 Beta-2 Beta-2 Beta-2 Beta-3 Beta-3 Beta-0 743 681 62 0.27 0.06 Beta-1 814 591 223 0.25 0.06 0.18 0.18 0.29 0.29 0.51 Beta-2 Beta-3 879 851 539 392 340 0.25 Beta-3 Beta-3 Beta-2 Beta-2 Beetata--1 Beetata--0 5 10 15 20 25 30 35 5 10 15 20 25 30 35 2degree 2degree Figure 1. XRD patterns of Beta zeolite samples. Figure 1. XRD patterns of Beta zeolite samples. Figure 1. XRD patterns of Beta zeolite samples. Adsorbed Volume (cm3/g) Adsorbed Volume (cm3/g) Differential pore volume (cm3/3g/nm) Differential pore volume (cm /g/nm) Figure 2. Nitrogen adsorption/desorption isotherms at 77 K and corresponding Figure 2. Nitrogen adsorption/desorption isotherms at 77 K and corresponding DFT pore Figure 2. NDitFroTgpeonreasidzseodripsttriobunt/idonesorfpBteitoanzeiosloitethsearmpslesa.t 77 K and corresponding DFT pore size distributions of Beta zeolite samples. size distributions of Beta zeolite samples. Table 1. Pore structure parameters of Beta zeolite samples from N2 adsorption isotherms. Table 1. Pore structure parameters of Beta zeolite samples from N2 adsorption isotherms. Table 1. Pore structure parameters of Beta zeolite samples from N2 adsorption isotherms. Sample S (m2/g) S b (cm3/g) V c (cm3/g) b (m2/g) S 2b2b2b3c3 BET mic ext mic meso Determined by the BET method. 459 0.1c 7 mic is micropore b Sext (m /g) Vmic (cm /g) Vmeso (cm /g) a surfacearea;Sextisexternalsurfacearea,Vmicismicroporevolume, Vmesoismesopore 879 539 851 392 Obtained from the t-plot method, S 340 0.23 volum8e5(=1V (total pobr3e9v2olume) -V ). 459 0.17 0.51 total mic Beta-3 Determined by the BET method. Obtained from the t-plot method, Smic is micropore surface area; Sext is a a Determined by the BET method.b Obtained frocm the t-plot method, Smic is micropore surface area; Sext is external surface area, Vmic is micropore volume, Vmeso is mesopore volume (=Vtotal(total pore volume) -Vmic). external surface area, Vmic is micropore volume, cVmeso is mesopore volume (=Vtotal(total pore volume) -Vmic). 242 459 0.25 0.23 0.17 Pore Diameter (nm) Pore Diameter (nm)PDF Image | Zeolite Catalysis
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