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CATALYTIC DECOMPOSITION OF BIOMASS TARS WITH NICKEL CATALYSTS
http://hdl.handle.net/10087/5146
http://hdl.handle.net/10087/51466e331cb9-6182-45ac-899c-1a2081f41bf7
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
Ph.D_E1-398.Le DD.pdf (5.2 MB)
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| Item type | 学位論文 / Thesis or Dissertation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2010-04-30 | |||||
| 著者 |
Le, Duc Dung
× Le, Duc Dung |
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| タイトル | ||||||
| タイトル | CATALYTIC DECOMPOSITION OF BIOMASS TARS WITH NICKEL CATALYSTS | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| その他のタイトル | ||||||
| その他のタイトル | ニッケル触媒を用いたバイオマスタールの接触分解 | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Catalyst | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Tar | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Fluidized Bed Gasification | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Biomass gasification | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_46ec | |||||
| 資源タイプ | thesis | |||||
| 著者(ヨミ) | ||||||
| 姓名 | レ, ジウク ジウン | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Tar is a viscous black liquid derived from pyrolysis of organic matter\nand a complex mixture of hydrocarbons. The presence of tar in the\nproduct gas may cause blockage and corrosion of equipments and be\nresponsible for fouling or reducing overall efficiency of processes. By far,\ntar removal is the most problematic during biomass gasification. Hence,\na successful implementation of gasification technology for gas engines,\ngas turbines or fuel cells based power projects depend much on the\neffective and efficient removal or conversion of tar from the product gas.\nBeside that, the catalytic steam reforming tar is one of the most\npromising methods to suppress the problems. The biomass product gas is\nusually low calorific value; therefore, an enhancement of the product gas\nquality is other important target. We propose a research topic that to\nutilise nickel–loaded brown coal char as a new catalyst for decomposing\ntar from biomass gasification in a fluidized bed gasifier. The method is\npromising to get benefits from the use of low rank coal char as a catalyst\nsupport material, a high catalyst activity of nickel and an enhancement\nof product gas quality. In this study, yallourn brown coal has been\nselected to prepare the catalyst support. The coal that is a low rank with\nhigh moisture content, a low heat value and high oxygen content is hard\nto use for generating energy. However, it has a lot of outstanding features\nsuch as less ash and sulfur content, and with abundant of\noxygen–containing functional groups such as carboxyl and phenol groups\nwhich are available for ion–exchange with metals. In this study, the\nnickel–loaded brown coal char (Ni/BCC) was prepared by an\nion–exchange method, dried at 380 K in nitrogen for 24 h, and then\npyrolysed at 923 K in nitrogen for 90 min. The works have been carried\nout is the use of the Ni/BCC catalyst to decompose tar in pyrolysis and\nsteam gasification processes. The experiments were performed on a\ntwo–stage fixed–bed reactor and a laboratory–scale fluidized–bed gasifier\nunder mild conditions (temperatures, steam, space velocities, operation\ntime). Inside of the gasifier was constructed by two beds, the primary one\nis a fluidized bed with sand, and the second one is a catalyst bed. The\nNi/BCC catalyst has shown high catalytic activity and stable activity and\ngiven the high quality of the product gas. In the presence of steam,\napproximately 90% of biomass tar was decomposed and useful gas\ncomponents (CH4, CO, and H2) yields were higher than those of a\nconventional Ni/Al2O3 catalyst. The Ni/BCC catalyst was characterized\nand exhibited a good dispersion of nickel particles, ultra–fine Ni less than\n15 nm and a large surface area (Approximately 350 m2/g). Moreover, at\nthe end of its life span, the catalyst can be easily disposed by gasifying or\nburning the coal char, during which the energy value of the char support\ncan be recovered. Further, the agglomerated nickel residues can be also\nused as functional materials for powder metallurgy and battery\ndevelopment. The general results suggest that the Ni/BCC catalyst offers\na potential to be used as a high activity catalyst for steam reforming of\ntar in biomass gasification. | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 学位記番号：工博甲398 | |||||
| 書誌情報 | p. 113p., 発行日 2010-03 | |||||
| フォーマット | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | application/pdf | |||||
| 著者版フラグ | ||||||
| 出版タイプ | AM | |||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
| 出版者 | ||||||
| 出版者 | 群馬大学工学研究科 | |||||
| 資源タイプ | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Thesis or Dissertation | |||||
| 学位名 | ||||||
| 学位名 | 博士（工学） | |||||
| 学位授与機関 | ||||||
| 学位授与機関名 | 群馬大学 | |||||
| 学位授与年月日 | ||||||
| 学位授与年月日 | 2010-03-24 | |||||
| 学位授与番号 | ||||||
| 学位授与番号 | 12301甲第398号 | |||||
| 更新日 | ||||||
| 値 | 2019-12-04 | |||||
