The use of Silica from beach sand as catalyst in Magnesium based hydrides for Hydrogen storage materials

2nd international Tropical Renewable Energy Conference 2017

Jalil, Zulkarnain^1 ; Rahwanto, Adi^1 ; Sofyan, Hizir^2 ; Usman, Mustafa^3 ; Handoko, Erfan^4

Department of Physics, Faculty of Mathematics and Natural Sciences, Syiah Kuala University, Banda Aceh

23111, Indonesia^1

Department of Statistics, Faculty of Mathematics and Natural Sciences, Syiah Kuala University, Banda Aceh

23111, Indonesia^2

Department of Agribusiness, Faculty of Agriculture, Syiah Kuala University, Banda Aceh

23111, Indonesia^3

Department of Physics, Faculty of Mathematics and Natural Sciences, Jakarta State University, Jakarta, Indonesia^4

关键词: Candidate materials;    Coprecipitation method;    Desorption temperatures;    Hydrogen storage system;    Kinetic reactions;    Material preparation;    Operating temperature;    XRD measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/105/1/012093/pdf
DOI  :  10.1088/1755-1315/105/1/012093

来源: IOP

【 摘 要 】

Magnesium (Mg) as one of the potential candidate material for absorbing hydrogen, because theoretically has the ability to absorb large quantities of hydrogen 7,6 wt%. However, the kinetic reaction of Mg is very slow. Its takes 60 minutes to adsorp hydrogen with the operating temperature (adsorb/desorb) high of 350°C. Therefore, in this study discusses the hydrogen storage materials based on MgH2-SiO2. The purpose of this study to improve desorption temperature of hydrogen storage system based on MgH2. The main material is MgH2combined with inserting SiO2catalyst was successfully extracted from quartz sand with coprecipitation method. As for the material preparation process is done with the technique of mechanical alloying. Milling MgH2+SiO2samples using a ball milling for 5 hours, with the ratio of ball to powder 10:1 and a speed of 400 rpm. By variation of the catalyst insertion of 1 wt%, 3 wt%, and 5 wt% of SiO2. The results of XRD measurement known that the sample was reduced to scale nanocrystal. Phase arising from the result of XRD observation are MgH2phase as the main phase, and SiO2phase as a minor phase. DSC testing results show that the lowest desorption temperature obtained on the sample with the addition of inserts weight of the catalyst 5 wt% SiO2has milling for 5 hours which is equal 307,11°C.