Liquid Organic Hydrogen Carriers: An Upcoming Alternative to Conventional Technologies. Thermochemical Studies.

详细信息    查看全文

• 作者：Sergey P. Verevkin ; Vladimir N. Emel鈥檡anenko ; Andreas Heintz ; Katharina Stark ; Wolfgang Arlt
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：September 19, 2012
• 年：2012
• 卷：51
• 期：37
• 页码：12150-12153
• 全文大小：191K
• 年卷期：v.51,no.37(September 19, 2012)
• ISSN：1520-5045

文摘

A system based on the catalytic hydrogenation/dehydrogenation reactions of N-ethylcarbazole is one of the most promising as the new class of the liquid organic hydrogen carrier (LOHC) compounds. Enthalpy of formation of the liquid dodecahydro-N-ethylcarbazole (fully hydrogenated N-ethylcarbazole) was measured using combustion calorimetry. Vaporization enthalpy for this compound was derived from vapor pressure鈥搕emperature dependence measured by transpiration. The enthalpy of formation of the gaseous dodecahydro-N-ethylcarbazole was derived and validated with the high-level quantum chemical calculation. Vapor pressures of the liquid N-ethylcarbazole (0.0008 bar) and dodecahydro-N-ethylcarbazole (0.01 bar) at a practical and relevant temperature (400 K) were assessed from the new experimental data. It has turned out that these vapor pressures were low enough to fulfill the basic requirement for an LOHC.