Improving the gas productivity of the alkaline electrolyzer through the circulation technique

Abstract

This research aims to study and improve the efficiency of a KOH electrolyzer through the gas productivity of
the electrolyzer with different the circulation technique. In this work, the conceptual design of an electrolyzer
falls into 2 categories; without pumping and with pumping. Direct current electricity at 5 different levels of 10,
15, 20, 25 and 30 A are charged into the system and the gas flow rate generated from the electrolyzer is
subsequently monitored. The results show that at 30 A the gas generated from the circulation with pumping
and the circulation without pumping are 2.31 litre/min and 1.76 litre/min, respectively. It is also found that the
energy consumed by both techniques is the same; however, the circulation with pumping design shows the
better gas productivity than that of the circulation without pumping design.