Boric acid versus boron trioxide as catalysts for green energy source H2 production from sodium borohydride methanolysis
Here, boric acid (H3BO3) and its dewatered form, boron trioxide (B2O3) were tested as catalysts for hydrogen (H2) evolution in the methanolysis of sodium borohydride (NaBH4) in methanol. Parameters such as catalyst types and their amounts, NaBH4concentration, and the reaction temperature affecting t...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Kyrgyz Turkish Manas University
2021-12-01
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| Series: | MANAS: Journal of Engineering |
| Subjects: | |
| Online Access: | https://dergipark.org.tr/en/download/article-file/1914637 |
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| Summary: | Here, boric acid (H3BO3) and its dewatered form, boron trioxide (B2O3) were tested as catalysts for hydrogen (H2) evolution in the methanolysis of sodium borohydride (NaBH4) in methanol. Parameters such as catalyst types and their amounts, NaBH4concentration, and the reaction temperature affecting the hydrogen generation rate (HGR) were studied. It has been found that H3BO3and B2O3catalyzed methanolysis reaction of NaBH4follow up first-order kinetics relative to the concentration of NaBH4. Furthermore, the conversion and activity of these catalysts were examined to determine their performance in ten consecutive use. Interestingly, H3BO3and B2O3have demonstrated superior catalytic performances in methanolysis of NaBH4comparing to the studies published in literature with the activation energy of respectively 22.08 kJ.mol-1, and 23.30 kJ.mol-1in H2production. The HGR was calculated as 6481 mL.min-1.g-1and 5163 mL.min-1.g-1for H3BO3and B2O3catalyst, respectively for 50 mg catalyst at 298 K. These results are comparably better than most metal nanoparticle catalysts used for H2production in addition to the naturally occurring boron-based environmentally friendliness of these materials. |
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| ISSN: | 1694-7398 |