Journal of Japan Solar Energy Society
Online ISSN : 2433-5592
Print ISSN : 0388-9564
Research paper
Potential of substitution of fossil resource consuming materials with biomass
aiming for 80% reduction of CO2 emission by the year 2050
Fujinori HANAWA
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2020 Volume 46 Issue 4 Pages 55-63


To attain 80% reduction of CO2 emission from fossil energy consumption (FEC) of the year 2013 (19.339 EJ) in 2050, the FEC must be less than 3.868 EJ in 2050. Assuming the following three paradigm shifts (PS), 1) reduction of energy demand of all energy consuming sections (including the loss of material production processes but except the energy used for materials themselves) to 70% of those of 2013 in 2050, 2) electrification of all of the transportation, and 3) introduction of CO2 non-emitting electricity generation that is equivalent to 1000 GW photovoltaic power plant (PVPP), and the expected population reduction to 80% of that in 2013, the energy demand of Japan in 2050 still exceed 1.818 EJ from the energy supply of FEC (3.868 EJ) added to the energy from the PVPP (3.600 EJ). The fourth PS, substitution of part of iron and cement mainly used for construction by 16 million tons of cutting edge woody biomass materials such as cross laminated timber (CLT) that could be used for mid-to-high rise buildings, could reduce another 0.845 EJ for materials leaving 0.973 EJ of energy demand that should be supplied by non fossil energy or eliminated by carbon capture and carbon fixing technologies in the future.

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