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Official Journal of the Japan Wood Research Society

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Table 3 Energy consumed and CO2 emitted to produce 1 ton of Bio-coke

From: Analysis of effect on CO2 emission reduction and cost estimation for the use of Bio-coke: a case study of Osaka, Japan

Process Item Amount Unit t CO2 (%)
Input
Raw material
 Energy Chips for 1 t Bio-coke 8.33 × 100 m3
  Obtaining raw wood material for chips (9.93 m3) Process I   6.44 × 10−2 7.0
Process II    5.91 × 10−3
  Manufacturing Processing (1)
(producing 9.93 m3 of chips)
Process III, IV
Light oil 3.26 × 101 L 8.41 × 10−2 8.4
Gasoline 1.39 × 10−1 L 3.22 × 10−4
LP gas 6.72 × 10−5 t 2.02 × 10−4
Kerosene 3.32 × 10−2 L 7.71 × 10−5
Processing (2) (Producing 1 t Bio-coke) Processes V–X Electricity 1.46 × 103 kWh 7.50 × 10−1 82.9
Light oil 1.49 × 100 L 3.85 × 10−3
Kerosene 8.21 × 10−1 L 2.05 × 10−3
Multi-diesel oil 5.28 × 10−3 L 1.53 × 10−5
  Pellet 2.00 × 10−1 t 7.65 × 10−2
  Product transfer Process XI Light oil 6.78 × 100 L 1.75 × 10−2 1.7
Output product Process XII Bio-coke 1.00 × 100 t 0 0.0
Total amount     t CO2 1.01 × 100 100
  1. Energy-related information was obtained from interviews with OFOA personnel. CO2 emissions associated with raising raw materials are from previous research [25]. CO2 emissions arising from chip production are not included for pellets