Hydrogen-natural gas mixture

Feasibility study for a H2NG system (hydrogen-natural gas mixture) 

Country: Italy
Year: 2019-2020
Activity: Hydrogen – Green & Power

The pre-feasibility study aimed to assess the applicability of the “H2NG” technology, transport and supply of a mixture of hydrogen and natural gas, from a technical, economic, environmental and commercial point of view.

H2NG technology proposes to use electricity from renewable source to produce hydrogen and its injection into the national gas grid in order to reach the following goals:

• Store energy from energy in the national gas grid;
• Reduce the CO2 emissions from gas grid combustion;
• Transport hydrogen efficiently and cost-effectively

The feasibility study covered the following units:

• hydrogen production by electrolysis;
• hydrogen injection into the existing gas grid;
• evaluation of hydrogen separation technologies;
• definition of the main items of the plant:
  • Electrolyzer;
  • Membrane separation unit;
  • Compression unit.

 

DISTINCTIVE DATA:

The pre-feasibility study has been developed considering:

• Flowrate of H2NG in the main line 300.000 Sm3/h;
• Flowrate of hydrogen 15.250 Nm³/h;
• Hydrogen content upstream the separation unit 5,00%;
• Hydrogen content downstream the separation unit 0,5%.