Hydrogen Production from an Alkali Electrolyzer Operating with Egypt Natural Resources

Abstract

Egypt is bordered by coastal sea 2450 km, while incident solar radiation is in the order of magnitudes of 1900-2200 W/m 2 in that area of the world. The present work is aimed to assess the hydrogen production from the solar-hydrogen system composed of photovoltaic cell motivated by solar energy and supplies electricity to alkali electrolyzer. The electrolyzer uses sea and Nile water as electrolytes. Indoor tests are done to identify the optimum concentration ratio of the sea water to produce hydrogen. Experimental results showed that stand-alone sea water gives a higher production rate. The results of the outdoor tests revealed the need for about seven units of electrolyzer working with the sea water to produce the same amount of hydrogen that KOH solution electrolyte would provide. However, the efficiency of solar-hydrogen units working with the sea water gives a lower constant efficiency of about 0.13%, followed by Photovoltaic/electrolyzer unit using Nile water of approximately 0.005%. The KOH solution electrolyte provides an efficiency of approximately 8% at solar noon. The sea water is recommended to be used instead of KOH solution in all coming electrolyzers.

A novel renewable energy‐based integrated system with thermoelectric generators for a net‐zero energy house

“…The proposed system comprises of seven subsystems, namely, PV panels, absorption chiller for cooling from low‐grade heat, electrolyzer, hydrogen blended HCCI engine, RO plant, biomass combustor, and organic Rankine cycle (ORC) units. Typical PV driven hydrogen production electrolyzer is selected . About 290 PV modules are utilized with the capacity of 75 W each.…”

“…About 290 PV modules are utilized with the capacity of 75 W each. The manufacturer data about these modules can be found in Table . The heat exchanger (HE) 1 heats up the water flowing to the electrolyzer for the increased rate of hydrogen production.…”

“…Typical PV driven hydrogen production electrolyzer is selected. 38 About 290 PV modules are utilized with the capacity of 75 W each. The manufacturer data about these modules can be found in Table 1.…”

“…The manufacturer data about these modules can be found in Table 1. 38 The heat exchanger (HE) 1 heats up the water flowing to the electrolyzer for the increased rate of hydrogen production. The produced hydrogen is blended with wet ethanol and burnt in HCCI engine coupled with generator for the generation of electricity.…”

Acid mine drainage wastewater photoelectrolysis for hydrogen fuel generation: Preliminary results

“…5,6 Studies have shown that the combination of pollutant removal with simultaneous generation of hydrogen fuel during electrolysis appears to be promising. 7,8 Obtaining hydrogen through the electrolysis of water is a process of decomposing H 2 O by providing energy in the form of electricity; however, this method requires a large energy expenditure in order to perform the electrolytic decomposition of water. 9 Despite a negative energy balance, electrolysis of water is still a viable option for hydrogen gas production.…”