Thermodynamic Analysis for a Blend of Methanol and Urea Water Solutions to Produce Hydrogen-Rich Gas
Horng-Wen Wu a, Yu-Rong Yang b, Zhi-Wei Guo b and Dhinesh Balasubramanian c
aProfessor, Department of Systems and Naval Mechatronic Engineering, National Cheng Kung University, Tainan, Taiwan, Taiwan 701401, ROC.
bGraduate Student, Department of Systems and Naval Mechatronic Engineering, National Cheng Kung University, Tainan, Taiwan, Taiwan 701401, ROC.
cAssistant Professor (Senior), Department of Mechanical Engineering, Mepco Schlenk Engineering College, Sivakasi, Virudhunagar, Tamil Nadu 626005, India.
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Abstract:
The article uses a thermodynamic investigation of the steam reforming of methanol (SRM) using either urea water solution (UWS) or pure water. This process examines hydrogen-rich gas production, hydrogen yield, and carbon creation. The SRM with UWS produces a higher hydrogen-rich gas and achieves greater reforming efficiency than SRM without UWS. With a water-to-methanol ratio of 5 at 700 °C using UWS, the maximum hydrogen yield reaches 4.4 mole/mole MeOH, resulting in the highest reforming efficiency of 117.9%. As the temperature exceeds 250 °C, carbon production declines significantly despite adding UWS. Although the carbon production with UWS is greater than that of non-used UWS, there is a slight difference. Comparing hydrogen and CO concentration with reference results for no UWS SRM validates the analysis's reliability. The results supported by an experiment show that the hydrogen-rich gas yield can increase when the UWS as a reactant replaces pure steam for methanol-reforming.
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