| 초록 |
2-(n-methylbenzyl)pyridine(mBP) and 2-benzyl-6-methylpyridine(BmP) and their hydrogenated pairs are promising LOHC materials. The only difference of these isomers is the position of methyl group, but they showed quite different reactivities. BmP was hydrogenated 2.4 times faster than mBP, and H12-BmP showed 1.5 times higher degree of dehydrogenation than H12-mBP. It was revealed by 1H NMR analysis that mBP and BmP had different hydrogenation reaction pathways. For mBP there was only one reaciton pathwy that forming 2-(n-methylbenzyl)piperidine intermediate, however for BmP there was an additional pathway that forming 2-methylcyclohexyl-6-methylpyridine intermediate. To understand the different dehydrogention reactivity, competitive adsorption experiment was designed. It was revealed that mBP's heterocycle had a stronger adsorbability to the catalyst than the homocycle, however for BmP vice versa. |
