成果報告書詳細
管理番号20120000000135
タイトル*平成23年度中間年報 新エネルギー技術研究開発 バイオマスエネルギー等高効率転換技術開発(転換要素技術開発) 草本系バイオマスの運搬と在庫及びエネルギー転換時の前処理工程を改善する可搬式ペレット化技術の開発
公開日2012/7/11
報告書年度2011 - 2011
委託先名株式会社北川鉄工所 三菱化学株式会社
プロジェクト番号P07015
部署名新エネルギー部
和文要約和文要約等以下本編抜粋:
1.研究開発の内容及び成果等
本プロジェクトでは、ストロー状で嵩高い草本系バイオマスについて、バイオマス収穫現場での乾燥・在庫と輸送コストの削減、及びバイオ燃料製造工場の設備投資規模に影響する在庫スペースの大幅な低減、更には、バイオ燃料変換時における前処理工程(乾燥・破砕工程)の簡略化を目的に、三菱化学株式会社が保有する特殊な透湿防水シートを用いた草本系バイオマスの簡易乾燥技術、及び北川鉄工所が保有する草本系バイオマスのペレツト化技術を機軸とした研究開発を実施している。以下に、研究開発の平成器年度の中間実績を報告する。
〔原料バイオマスの効率的回収と裁断及び乾燥・在庫方法の研究開発/三菱化学株実施〕
(1)草本系バイオマスの効率的回収と乾燥・在庫方法の研究
気候の異なる北海道、新潟および福岡の圃場において、地域別の稲わら回収適期とシートによる最適在庫期間の検討を行った。まず、予備乾燥である天日乾燥期間による乾燥度合いの差を確認した。各圃場において稲わらを収穫、圃場での天日乾燥期間は0日、1日、2日、3日と条件を変えたのち口ールベールに加工し、21年度に選抜した透湿防水シートで覆い、在庫・乾燥試験を実施した。
英文要約[Research & development for efficient collection, cutting, drying and storage of biomass as the raw material/ By Mitsubishi Chemical Corp.]
(1) Research for efficient collection, drying and storage of plant derived biomass
In 3 farms of different climates(Hokkaido, Niigata, Fukuoka), the drying test of rice straw roll veils were carried out by using water proof sheet penetrating vapor (abbreviated to WPV sheet) in each region.
The result of 15?17% moisture was obtained against target value of 20% in all regions.
(2) Physical property evaluation of WPV sheet before and after each stock test of rice straw rolls
Physical property(pulling intensity, tearing intensity, vapor penetration degree and water proof pressure before and after stock test(Used out door.) was measured about sheets used for stock and drying test. In its result, WPV made by Mitsubishi plastic Ltd. averagely got high value in penetrating degree and water proof pressure(rain proof). And then two years durability is verified by observing no remarkable deterioration of physical property after two years use.
(3) Cultivation and gasification of plants for large biomass
Pennisetum Purpureum Schum which was expected high yield as a farm product of resource was cultivated, but it was unsuitable for pelletizing processing because it was too large stalk to dry in farm, and its rotting phenomenon was occurred while stocking. In case it was gasified at around 950℃, gas composition of 2:1 ratio in H2 and CO was obtained, but clinkering problem was concerned due to low melting point of its ash.
[Research & development of transportable pelletizing technology for plant derived
biomass/ By Kitagawa Iron works Co., Ltd.]
(1) Performance evaluation of transportable pelletizing system
Processing capacity of transportable pelletizing system, which can be installed in idle farm near to harvest cite of plant derived biomass, reached to max 1.2t/h. The load power of pelletizing rice straws was 70kW/h and lower than wooden chip material of same size(2mm?5mm) was ca.80kW/h. The bulk density of produced rice straw pellets was a little less than 0.6 and little low, and however it can be judged to be efficiently pelletized.
(2) Evaluation of applicability to plant derived biomasses
Roll veils of Pennisetum Purpureum Schum and Sorghum were tested of pelletizing as material. The result showed that both of them were easy to block in roll cutter unit. On the other hand, according to molding unit, in case moistures of material were within range of 10%?20%, Pennisetum Purpureum Schum and Sorghum too were possible to pelletize. It is necessary in future to modify the roll cutter unit to the design suitable to kinds of plant derived biomass in order to apply to wide range of plant derived biomass.
(3) Evaluation of applying rice straws to material for bio-ethanol
The applicability to bio-ethanol as material of rice straw pellets was studied about simultaneous saccharification and fermentation, and simultaneous saccharification and fermentation after alkaline treatment. The result showed that the rice straw pellets were higher yield than crush product of rice straw. The reason is thought that rice straw pellets are better water absorbance and dispersibility in solution than crush product.
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