成果報告書詳細
管理番号20110000000751
タイトル*平成22年度中間年報 エネルギーイノベーションプログラム 戦略的石炭ガス化・燃焼技術開発(STEP CCT) 次世代高効率石炭ガス化技術開発(H19~22)
公開日2011/6/23
報告書年度2010 - 2010
委託先名財団法人石炭エネルギーセンター 独立行政法人産業技術総合研究所 国立大学法人東京大学 国立大学法人大阪大学 国立大学法人九州大学
プロジェクト番号P07021
部署名環境部
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)低温ガス化
【1】水蒸気ガス化およびチャーの燃焼の基礎研究(産総研)
熱分解炉がドロップチューブタイプであり,ガス化炉,燃焼炉を気泡流動層とする新規な循環流動層ガス化装置を試作した。試作したガス化装置を用いて,アダロ炭のガス化基礎特性を検証した。媒体粒子を多孔質アルミナとした場合,熱分解,ガス化,燃焼の各炉から排出されるガスから求めた炭素の物質収支はほぼ良好であり,また長時間の安定したガス化試験が可能であることを確認した。ついで,循環速度(ガス化炉での固体粒子滞留時間),水蒸気濃度等の操作条件を変化させた場合の熱分解,ガス化反応場の分離によるガス化速度促進の効果を検証し,分離によりガス化が促進されることを確認した。
英文要約Title: Energy Innovation Program~Strategic Coal Gasification and Combustion Technology Development (STEP CCT) Next-generation High-efficiency Coal Gasification Technology Development (FY2007 - FY2010) FY2010 Annual Report
1. Low-temperature gasification (AIST and Kyushu University)
 A gasification equipment that uses a drop tube pyrolytic reactor, a bubbling fluidized bed gasifier, and a combustor was tested. It was confirmed that separation of coal pyrolysis accelerates char gasification. In addition, when a coal to char ratio of 50:50 (carbon standard) was gasified at 900~C in a 2.5 m heated length drop tube reactor, the heavy tar yield was 1.4%-C. This was less than the 1.8%-C heavy tar yield obtained without the char mutual interaction.
2. Catalytic gasification and chemical loop gasification (Akita University, Gunma University, Kyushu University, JCOAL)
 When CaCO3 was used as catalyst for Adaro coal char gasification at 750~C, only a small amount of 0.4 mass % Ca can achieve an conversion after 1 hr as 1.5 times that of raw coal. When ion exchanged coal by using a Ca(OH)2 was gasified at 900~C in a drop tube reactor, the tar and char gasifications were enhanced despite only several seconds.
 When mixed gasification with alkali supported coal with raw coal was performed, a marked enhancement of gasification compared to that for both the lignite and bituminous raw coals was observed.
 It was also shown that 700~C is suitable for K2CO3@LMC82 catalyst coal gasification in both of the gasification reactivity and the active species loss prevention after the gasification reaction.
 For chemical-loop gasification, the authors found that, the sulfur content in the sample collected from the calcination equipment filter was a higher concentration than that of samples from other locations.
3. Analysis of the fluidization in the reactor (The University of Tokyo, Osaka University, AIST)
 The particle flow properties under high-speed and high density in a large circulation fluid bed consisting of a riser, downer, and bubble fluid bed were measured. Increasing the riser air tower speed and gas seal bed height increased the particle mass flux (Gs). The Gs was achieved at >500 kg/m2 s, and the riser particle holdup (εs) was 0.04 to 0.05.
To evaluate the adhesion and coagulation of silica sand and char, an interparticle adhesion force model was introduced into the fluidized bed simulation and studied.
4. System study (AIST)
 Comparison of pre- and post-combustion CO2 capture for A-IGCC was made. The DEPG (Selexol) absorption obtained a transmission end efficiency for pre-combustion that is higher than that of the amine method for post-combustion. Additionally, fuel cell and fuel cell gas turbine systems were studied. To return 700~C pressurized anode exhaust gas to the coal gasifier obtained a maximum efficiency of 69.7%.
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