Effect of a novel metal-free green synthesis catalyst on the positive role of microwave irradiation in hydrogen production from the hydrolysis of sodium borohydride

Arzu EKİNCİ, Ömer ŞAHİN, Orhan BAYTAR*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

This study demonstrates the synthesis of hydrochar, a high-value material, from watermelon seed husk, a low-value waste material, using the hydrothermal synthesis method. The microwave power effect plays an important role in the use of metal-free and environmentally friendly catalysts for the hydrolysis of sodium borohydride. The XRD, BET, SEM, and FTIR analyses characterized the catalyst. X-ray diffraction revealed the catalyst structure to be cellulosic. The surface area and total pore volume were 1.063 m2/g and 0.0195 cm3/g, respectively, in BET analysis. According to the IUPAC classification, the catalyst conformed to the type III isotherm. This study investigated how good the catalyst for the hydrolysis of sodium borohydride was when it was exposed to microwave irradiation at different microwave powers, solution temperatures, and catalyst amounts. The Langmuir-Hinshelwood and nth-order kinetic models calculated the activation energies to be 82.192 and 83.35 kJ/mol, respectively. The use of bio-waste hydrochar as a catalyst in the hydrolysis of sodium borohydride in the microwave environment shows promising results in the search for metal-free catalysts.

Original languageEnglish
Pages (from-to)644-651
Number of pages8
JournalProcess Safety and Environmental Protection
Volume187
DOIs
Publication statusPublished - Jul 2024

Bibliographical note

Publisher Copyright:
© 2024 The Institution of Chemical Engineers

Keywords

  • Activation energy
  • Green synthesis
  • Hydrochar
  • Hydrolysis
  • Metal free catalyst

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