成果報告書詳細
管理番号20100000001267
タイトル*平成21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(先導技術開発) セルロース系バイオマスエタノールからプロピレンを製造するプロセス開発 (触媒技術研究組合、東京工業大学、広島大学)
公開日2010/9/9
報告書年度2009 - 2009
委託先名触媒技術研究組合 東京工業大学 広島大学
プロジェクト番号P07015
部署名新エネルギー技術開発部
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 (1)高性能触媒開発 エタノールをプロピレンに変換する触媒開発は、10員環ゼオライト系、8員環ゼオライト系およびメゾ多孔体系の3種の触媒について、それぞれの特徴を活かした開発を進めた。 (2)プロセス開発 平成21年度のプロセス開発は以下の項目について実施した。
・各種触媒の実験データを基にした反応速度解析
・反応器シミュレーション
・マイクロ装置(エタノール処理量:10kg/日)設計、製作
・プロセスフロー作成
英文要約Title: Development of technologies to produce propylene from cellulosic ethanol (FY2008-2010) FY2009 Annual Report.
(1) Protonated ZSM-5 type zeolites containing alkaline earth metals were prepared under various synthesis conditions and their catalytic performance in the conversion of ethanol to propylene (C3H6), was investigated. The C3H6 yield and the catalytic stability were strongly dependent on M/Al and SiO2/Al2O3 ratios as well as the reaction conditions. Some of the Sr-HZSM-5 zeolites exhibited the highest C3H6 yield of 32 % (C-base) and a high catalytic stability. From 27Al MAS NMR measurements, it was found that the high catalytic stability of Sr-HZSM-5 is due to a high resistance to steaming. The deposition of carbonaceous materials on Sr-HZSM-5 was also suppressed by modification with Sr as compared with HZSM-5. (2) SAPO-34 has the advantage of a high selectivity for propylene, but has the disadvantage of a short catalytic life in the conversion of ethanol. To investigate the selectivity of propylene and the lifetime, SAPO-34 molecular sieves were synthesized with controlling particle sizes and the mole fraction of Si in the framework. The selectivity of propylene was crucially dependent on particle sizes of SAPO-34, and was independent of the mole fraction of Si. On the other hand, the deactivation of SAPO-34 was influenced by the mole fraction of Si as well as particle size. We found it necessary to operate the mole fraction of Si to gain a higher yield of propylene and a longer lifetime. We also confirmed that the SAPO-34 catalysts can be regenerated repeatedly by removing carbonaceous materials. (3) Extensive studies were carried out for enhancement of the catalytic activity on Ni ion-loaded mesoporous silica in the conversion of ethanol to propylene (ETP). The investigations revealed that Ni precursors affected the catalytic activity and stability. The most active catalyst could be prepared by using a suitable Ni precursor and showed about 30% of propylene yield.Another approach was the control of reaction pathways and/or intermediates. Our previous studies indicated that there are two reaction pathways in ETP. One is the pathway via ethylene and the other is via acetaldehyde. Our efforts were devoted to development of catalysts active for the latter pathway. Various kinds of mesoporous materials and oxides were found to catalytically promote the reaction. Some good catalysts gave 45-60% yields of propylene, showing the great possibility of the acetaldehyde route for the high yield of propylene. (4) Process development was studied as follows; (i) Analysis of the reaction rate based on miniature-scale catalyst performance data and simulation of reactor design for maximum propylene yield: The simulator estimated the propylene yield at a contact time. (ii) Design and introduction of micro-scale apparatus: Two reactors were designed and made for the catalysts evaluation with different reaction rates. (iii) Process flow for distilling propylene from reaction products: From the viewpoints of heating/cooling value and facility components, the case distilling light-weight components first was found more economical than the case distilling heavy-weight components first.
ダウンロード成果報告書データベース(ユーザ登録必須)から、ダウンロードしてください。

▲トップに戻る