TY  - JOUR
TI  - RELEASING HYDROGEN FROM $NABH_4$ VIA HYDROGEL BASED $CoF_2$ CATALYST
AB  - In this paper, the dehydrogenation reaction of NaBH4 was performed in the presence of Co-ion loaded hydrogel catalyst. The reactions took place within 27, 18 and 9 hours at 25, 35 and 45 °C, respectively. In addition, the relation between the initial concentration of $NABH_4$and released hydrogen was investigated at 45°C. A linear relationship between initial borohydride concentration and produced $H_24 was determined. Also, differential method was used to determine reaction rate constants and rate order. Hence, first-order-kinetics was proved by using experimental data. After that, the activation energy was found as 58.26 kJ/mol by means of the slope of the graph of lnk versus 1/T for the dehydrogenation reaction. This value is nearly equal to 50kJ/mol, which was expected in literature for the studies of the catalytic dehydrogenation. As the hydrophilic and macroporous structure of the prepared poly(acrylamide-co-acrylic acid) (p(AAm-co-AAc)-Co) hydrogel catalyst allowed inlet of $NABH_4$ solution up to its interior and release of produced $CoF_2$, effect of pore diffusion limitation was neglected. Dehydrogenation index of NaBH4 was calculated as 2526.31 mL $H_2/g$ $NABH_4$ according to the amount of $NABH_4$ in the aqueous solution
AU  - Gürü, Metin
AU  - Akkas boynuegri, Tugba
DO  - 10.47480/isibted.979270
PY  - 2021
JO  - Isı Bilimi ve Tekniği Dergisi
VL  - 41
IS  - 1
SN  - 1300-3615
SP  - 1
EP  - 9
DB  - TRDizin
UR  - http://search/yayin/detay/511283
ER  -