92
6 Results
6.3
The Results of the Study Case Japan
6.3.1 The Current Decarbonisation Potential of Japan
According to the results shown in appendix 21, the renewable energy offer of
Japan is limited. The scenario (1) indicates that if Japan would use the entire
renewable electricity production, the decarbonisation potential would be of 38%,
offsetting 14,63 Mt yr −1 of CO 2 (table). The use of the curtailed renewable electricity according the scenario (2) would only allow for a decarbonisation potential
of 3%. Finally, the scenario (3) would enable a decarbonisation potential of 11%,
with a CO 2 offset of 4,24 Mt yr −1 .
Like the other study cases, the option (b) is not viable for assessing the current
decarbonisation potential as this would entail that all the steel is manufactured via
the DRI-EAF route.
6.3.2 The 2030 Decarbonisation Potential of Japan
The appendix 21 shows that, following the unlikely scenario (1) with steel manufacturing option (b), Japan could achieve an 80% decarbonisation potential with
a CO 2 offset of 130,82 Mt yr −1 . The more realistic scenario (2) would allow for
a 6–8% decarbonisation potential with a 3,23–10,47 Mt yr −1 CO 2 offset. Finally,
the scenario (3) consisting on using a power-to-gas system for a minimum period
of 2.550 h yr -1 would enable a decarbonisation potential of 23–30% with a CO 2
offset of 11,72–37,94 Mt yr −1 .
6.3.3 The Decarbonisation Potential of Japan Using its
Technical Potential of Renewable Energy
The results of appendix 21 show that Japan renewable energy technical potential
could allow for renewable hydrogen self-sufficiency and potential full decarbonisation of the industry sectors falling in the research scope. If Japan steel
manufacturing would be converted to the DRI-EAF route corresponding to the
steel manufacturing option (b), the CO 2 offset could be of 162,56 Mt yr −1 .
6 Results
6.3
The Results of the Study Case Japan
6.3.1 The Current Decarbonisation Potential of Japan
According to the results shown in appendix 21, the renewable energy offer of
Japan is limited. The scenario (1) indicates that if Japan would use the entire
renewable electricity production, the decarbonisation potential would be of 38%,
offsetting 14,63 Mt yr −1 of CO 2 (table). The use of the curtailed renewable electricity according the scenario (2) would only allow for a decarbonisation potential
of 3%. Finally, the scenario (3) would enable a decarbonisation potential of 11%,
with a CO 2 offset of 4,24 Mt yr −1 .
Like the other study cases, the option (b) is not viable for assessing the current
decarbonisation potential as this would entail that all the steel is manufactured via
the DRI-EAF route.
6.3.2 The 2030 Decarbonisation Potential of Japan
The appendix 21 shows that, following the unlikely scenario (1) with steel manufacturing option (b), Japan could achieve an 80% decarbonisation potential with
a CO 2 offset of 130,82 Mt yr −1 . The more realistic scenario (2) would allow for
a 6–8% decarbonisation potential with a 3,23–10,47 Mt yr −1 CO 2 offset. Finally,
the scenario (3) consisting on using a power-to-gas system for a minimum period
of 2.550 h yr -1 would enable a decarbonisation potential of 23–30% with a CO 2
offset of 11,72–37,94 Mt yr −1 .
6.3.3 The Decarbonisation Potential of Japan Using its
Technical Potential of Renewable Energy
The results of appendix 21 show that Japan renewable energy technical potential
could allow for renewable hydrogen self-sufficiency and potential full decarbonisation of the industry sectors falling in the research scope. If Japan steel
manufacturing would be converted to the DRI-EAF route corresponding to the
steel manufacturing option (b), the CO 2 offset could be of 162,56 Mt yr −1 .