Binderless hierarchically porous 4A-zeolite has been successful produced through hydrothermal crystallization. in which silicon-aluminum sol binded to the carbon nanofibers (CNFs). that is to say. where the CNFs powder was coated during the crystallization 4A-zeolite. https://www.ealisboa.com/limited-value-AXYS-Valhalla-Pen-must-buy/