One-step synthesis of egg-tray-like layered ordered macro-mesoporous SiO2–Al2O3 composites for enhanced hydrodesulfurization performance

Fine-Tuning of Pt Dispersion on Al2O3 and Understanding the Nature of Active Pt Sites for Efficient CO and NH3 Oxidation Reactions

“…As listed in Table , the BET SA of Pt/Al 2 O 3 -L (189 m 2 ·g –1 ) was relatively lower than that of Pt/Al 2 O 3 -M (246 m 2 ·g –1 ) and Pt/Al 2 O 3 -H (268 m 2 ·g –1 ), which could be resulted from the precalcination of bayerite Al­(OH) 3 at a higher temperature (550 °C) before being used as the support for Pt/Al 2 O 3 -L. The N 2 adsorption–desorption isotherms and pore size distributions of the Pt/Al 2 O 3 catalysts are demonstrated in Figure b,c. The isotherm profiles for all Pt/Al 2 O 3 catalysts were found to exhibit a typical type II and type IV mixture, with an H4 hysteresis loop, suggesting the formation of narrow slit pores, as confirmed by the results of pore size distributions.…”

“…XRD patterns for the asprepared Pt/Al 2 O 3 catalysts were first collected to investigate their crystal structure. As shown in Figure 1a, after the The isotherm profiles for all Pt/Al 2 O 3 catalysts were found to exhibit a typical type II and type IV mixture, with an H4 hysteresis loop, suggesting the formation of narrow slit pores, 33 as confirmed by the results of pore size distributions.…”

Novel-ordered hierarchical ZSM-5 zeolite with interconnected macro–meso–microporosity for the enhanced methanol to aromatics reaction

“…The preparation method of PMMA was carried out using previously reported procedures. 26 First, 400 mL of deionized water and 50 mL of MMA which is washed sequentially with NaOH solution and deionized water were added into a three-necked flask and stirred at 350 rpm. Once the temperature was gradually increased to 77 °C, 0.29 g of potassium persulfate dissolved in 100 mL of water was added and the reaction system was maintained for 4 h. After that, PMMA colloidal crystals were obtained after cooling, centrifuging, and drying at 50 °C.…”