02151nam a2200265Ia 4500003001000000005001700010040000900027090001200036245010500048490007000153520122000223650001201443650001501455650001901470700001301489700001301502700001201515700001301527700001401540856015601554942001401710008004101724999001701765952010301782MX-MdCICY20260521091732.0  cCICY  aB-2043310aThermochemical method for controlling pore structure to enhance hydrogen storage capacity of biochar0 vInternational Journal of Hydrogen Energy, 48, p.21799-21813, 20233 aDeveloping new carbon-based hydrogen storage materials can significantly promote solid-state hydrogen storage technology. Biochar with high hydrogen storage capacity can be prepared by KOH melt activation, which has a high proportion of micropores (96.56 percent)compared with the porous carbon in the existing literature. Its specific surface area and pore volume are 2801.88 m2/g and 1.44 cm3/g, respectively. The size of the nanopores is affected by the activation ratio, but the temperature has little effect at the low activation ratio. SEM results show that the KOH activation process gradually shifts from the biochar's inside to the outside. A low KOH/char ratio (less than 2:1)can promote the formation of small aromatic rings. Due to its high specific surface area and microporosity, the absolute adsorption capacity of hydrogen in biochar is 2.53 wt percent at ?196 °C and 1 bar, rising to 5.32 wt percent at 50 bar. The hydrogen adsorption process conforms to the Langmuir model. Microporous, mesoporous, and macroporous exhibit different hydrogen adsorption characteristics in various pressure ranges. However, ultramicroporous (<0.7 nm)always plays a decisive role in the hydrogen storage of biochar.14aBIOCHAR14aACTIVATION14aPORE STRUCTURE12aDeng, L.12aZhao, Y.12aSun, S.12aFeng, D.12aZhang, W.40uhttps://drive.google.com/file/d/1T0CpBXqsiLLhJkxF6FPd9U-4As1ghbZs/view?usp=drivesdkzPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx  2LoccREF1250602s9999    xx |||||s2   |||| ||und|d  c30464d30464  00102Loc40708F1aCICYbCICYcREd2025-06-25l0oB-20433r2025-06-25 16:24:48w2025-06-25yREF1