A Study of Parameters and Performance or Micro Methanol Reformer
Date Issued
2009
Date
2009
Author(s)
Chen, Tsung-Cheng
Abstract
Reformed methanol fuel cell （RMFC） technology uses a steam reforming reactor to generate fuel-cell-ready hydrogen from a highly concentrated methanol solution. For PEMFC at portable electronic devices application, it is needed to develop micro RMFC which will work with micro PEMFC. At this research, a micro reformer was build for experimental study, which was construed with three channels included serpentine flow and has the dimension of 100mm×120mm×15mm. The micro channels have a width of 0.75mm and two kinds of depth, i.e. 0.75mm and 1.5mm. Three length of the channel was designed as 633mm、1015mm and 1392mm. Commercially available CuO-ZnO-Al2O3 catalyst was coated inside the micro channels for steam reforming. The catalyst was used about 0.08g for top plate and about 0.14g for base. The experimental results show the methanol conversion and hydrogen production rate increase with reaction temperature raise at 200-280℃. When reaction temperature at 280℃, 0.005ml/min feeding rate cause that the methanol conversion reaches 100% approximately. But as feeding rate set 0.02ml/min, the methanol conversion was 83.4%, and hydrogen production rate reaches 18.0sccm which can produce power output of 22.5W from micro PEMFC. The experimental results also show that the methanol conversion decrease and the hydrogen production rate increase with feeding rate raise. For different concentration, the water to methanol ratio at 1.4 has optimal methanol conversion. Increasing the length of channel and the dimension of cross section would add the chemical reaction time, and then increase the methanol conversion and hydrogen production rate.
Subjects
PEMFC
micro
reformer
methanol
steam reforming
hydrogen
SDGs
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-98-R96522306-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):827a2d6dd85436cca5837e2cc229cbee