Development of a novel coal gasifier with controlling volatile-char reactions and hydrodynamics
| Project/Area Number |
17H03451
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Reaction engineering/Process system
|
|---|
| Research Institution | Tokyo University of Agriculture and Technology |
|---|
Principal Investigator |
Fushimi Chihiro 東京農工大学, 工学(系)研究科(研究院), 准教授 (50451886)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
酒井 幹夫 東京大学, 大学院工学系研究科(工学部), 准教授 (00391342)
官 国清 弘前大学, 地域戦略研究所, 教授 (90573618)
|
|---|
| Project Period (FY) |
2017-04-01 – 2020-03-31
|
| Project Status |
Completed (Fiscal Year 2019)
|
| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2019: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2018: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥10,660,000 (Direct Cost: ¥8,200,000、Indirect Cost: ¥2,460,000)
|
|---|
| Keywords | ガス化炉 / 流動層 / 高効率ガス化 / ダウナー / 反応速度 / 気固分離 / ガス化 / 高効率発電 / 流動層反応器 / 金属触媒 / 気固分離器 / 石炭 |
|---|
| Outline of Final Research Achievements |
Experiments of coal pyrolysis and gasification was conducted in a novel downer (i.e. co-current down flow) pyrolyzer and bubbling fluidized bed gasifier. The effect of activated carbon or non-porous carbon particles preheated at 1173 K was investigated. Results show the AC and the non-porous carbon greatly suppress the emission of tar owing to the decomposition of aromatic hydrocarbons into coke.
Cold gas efficiency (CGE)s of 85.0, 82.7 and 80.9% can be achieved at gasification temperatures of 800, 850 and 900C, respectively. There is a trade-off between the CGE and the gasifier design parameters. We conclude that a gasification temperature of 850C is the most suitable for TBCFB gasifiers.
By using Computational Fluid Dynamics (CFD), we simulated hydrodynamics of solids in a donwer or a novel conical downer with very large solids mass flux. By integrating the CFD with Coarse-grained Discrete Element Method CFD method, we simulated flow behaviors of the gas and solids in the TBCFB.
|
| Academic Significance and Societal Importance of the Research Achievements |
炭素系資源のガス化によるガス燃料（主にH2とCO）の生成効率指標として冷ガス効率があるが、これまで熱力学的に低温で効率が上がることが示唆されていた。本研究では、熱収支から冷ガス効率の熱力学的な理論最大値と、ガス化反応速度と反応時間および流動層内の粒子循環速度から実機の反応器大きさを明らかにした。
熱分解ガス化で問題であるタールをガスに変換するためにチャー（熱分解後の固体残渣）を用いた研究は多い。本研究では熱分解時に反応温度まで加熱した粒子を供給し、初期のタールの粒子への付着挙動やその付着炭素のガス化反応特性を初めて明らかにした。この得られた知見はバイオマスの低温ガス化にもそのまま適用可能である。
|
Report
(4 results)
Research Products
(28 results)
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] Numerical simulation of hydrodynamic behaviours in a novel gas-solids moving bed rector under a downer2019
Author(s)
Zhongkai Zhao, Chihiro Fushimi, Atsushi Tsutsumi, Xiaogang Hao, Akihiro Yoshida, Abuliti Abudula, Guoqing Guan*
Organizer
Fluidization XVI, May 26-31, 2019, Guilin, China
Related Report
Int'l Joint Research
-
-
-
[Presentation] High-density solids holdup operations in downers: Theoretical analysis and simulation2019
Author(s)
Guoqing Guan, Wenhao Lian, Zhongkai Zhao, Xiaogang Hao, Abuliti Abudula, Chihiro Fushimi, Atsushi Tsutsumi
Organizer
8th Asian Pacific Confederation of Chemical Engineering Congress (APCChE 2019), Sept. 23-27, 2019, Sapporo, Japan
Related Report
Int'l Joint Research
-
-
-
-
-
-
-
-
-
-
-
-
-
