Production of dual functional carbon material from biomass treated with NaOH for supercapacitor and catalyst

Abstract

In this research, tea factory waste (TFW), an organic biomass source, was used as a metal free basic catalyst for the production of hydrogen from NaBH4 by methanolysis. In the preparation of the catalysts, tea factory wastes taken from the tea factory and released during tea production were used. For the production of H2 from NaBH4 by methanolysis, TFW was pre‐treated with different base materials (KOH, NH4Cl, and NaOH). Tests have been made on different mixing ratios, combustion temperatures, and durations for catalyst optimization by selecting the base with the highest hydrogen yield. Hydrogen production efficiency was recorded as 2832.2 and 6560.8 mL min−1 g−1 at 30°C and 60°C, respectively. The activation energy of the catalyst was defined as 18.07 kJ mol−1. Characterization of TFW catalyst was examined by SEM‐EDX, XRD, and FT‐IR analysis. When the obtained data were evaluated and some studies available in the literature were considered, it was concluded that tea factory wastes, which are a biomass resource, can be used in catalyst production. The capacitance value of the electrode was computed as 8 to 12.9 F g−1.

Fabrication of Low-Cost and High-Energy Storage Capacitor Electrode from Teak (Tectona grandis) Leaves

“…Thus, the electrode developed in this process has outstanding stability. Özarslan and co-workers prepared porous carbon through tea factory waste activated with NaOH in a hot-air oven for 24 h and was pyrolyzed at higher temperatures. The C sp value of the electrode was computed as 12.9 F g –1 with a CD of 0.5 A g –1 .…”

Metal İçerikli Asit Çözeltisi ile Muamele Edilmiş Atık Asfaltın Hidrojen Üretiminde Katalizör Olarak Kullanımı

“…Ancak bol bulunmaması ve kullanımının pahalı olması sebebiyle tercih edilmemektedir [16]. Bunun yerine son zamanlarda katalizör malzemesi olarak mikroalg türleri [17,18], kahve atığı [19], kayısı çekirdeği kabuğu [20], mısır sapı [21], pamuk lifleri [22], çay fabrikası atığı [23], nar kabuğu [24], göl tortusu [25], metalürjik atık çamur [26] ve portakal kabuğu [27] gibi malzemelerin kullanıldığı çalışmalara rastlamak mümkündür. Bu çalışmada ise, asetik asit ile muamele edilmiş metal destekli atık asfalt katalizörü kullanılarak NaBH4 metanolizi yoluyla hidrojen üretimi incelenmiştir.…”

New bifunctional carbon material of metal‐free pomegranate peel catalyst and supercapacitor for highly efficient hydrogen production and energy storage

“…Hence, together with catalyst studies, a super capacitor was developed to determine the energy storage capacity of the material used. By the way, this material was named as cap‐cat in the literature 38‐41 …”

“…By the way, this material was named as cap-cat in the literature. [38][39][40][41] In this study, optimization experiments were carried out in different acid concentrations, different burning temperatures, and different burning times of pomegranate peel catalyst. In this experiments, the heating process was used to increase the active sites of the biomass.…”