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成果報告書詳細
管理番号20170000000768
タイトル*平成28年度中間年報 セルロース系エタノール生産システム総合開発実証事業 最適組合せの検討及び事業性評価 木本バイオマスを原料とする日本の持続可能性基準に適合するセルロース系エタノールの一貫生産技術開発及び事業性評価
公開日2017/8/29
報告書年度2016 - 2016
委託先名JXエネルギー株式会社 王子ホールディングス株式会社
プロジェクト番号P14025
部署名新エネルギー部
和文要約
英文要約Title: Demonstration and Development Project of Production System for Cellulosic Bioethanol/ Verifying suitable combinations of elemental process technologies/ Development and feasibility study of comprehensive production process for cellulosic bioethanol from woody biomass which adapts Japanese sustainable standard (FY2015-FY2017) FY2016 Annual Report

The purpose of this project is to establish the technologies required for the commercialization of an integrated production system for producing cellulosic ethanol that meets the criteria for sustainability and does not put pressure on food supplies, by way of demonstrations in the laboratory and using a pilot plant. It is also to show whether a business model can be built around such an integrated production system. The following work was done in FY2016.

1. Demonstrations in the laboratory and using a pilot plant
- Pretreatment of raw materials: Picking up on work done in FY2015, we studied the temperature, time and amount of alkali added for cooking of wood chips, and determined the conditions required to achieve the target rate of saccharification. And as we did for wood chips, we are also studying the optimal pretreatment conditions for forest residues.
- Enzyme selection: We narrowed down the choices to two commercial enzymes (types A and B), and looked at the cost and handling properties of each. The decision was made to use Enzyme B, which can be added in smaller amounts and still gets us to the target saccharification rate.
- A pilot plant, designed to enable continuous, multiple parallel fermentation, was completed in August 2016. The plant can process 1 ton/day of raw material (cellulosic biomass), and gives an ethanol yield of at least 250 L/ton of raw material.
- Following an initial test-run, we ran the plant to determine the optimal operating conditions starting at the end of October, and achieved our initial target for ethanol yield of at least 250 L/ton of raw material.

2. Business feasibility study
- We continued with trials begun last year aimed at clarifying the cost of procuring forest residues, and concluded that, by improving the efficiency of collection and transport, the cost of procuring forest residues could be reduced, and we could get the material for less than the cost of regular chips.
- We evaluated several potential locations for a plant in terms of their distance from the raw material growing areas, availability of existing facilities and other factors. Brazil emerged as the strongest candidate, due in part to its having pulp mill at which ethanol production plant could also be built.
- We continued to conduct greenhouse gas (GHG) emissions that include all phases of the process, from collection of the raw materials to the supply of the product ethanol in Japan. When we rechecked GHG emissions completed based on data collected through this year, we determined it would be possible to achieve the goals of a reduction in GHG emissions of 50% or more (vs. gasoline) and a fossil energy balance of 2 or higher.
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