JP4667835B2 - 水素発生媒体およびその製造方法 - Google Patents
水素発生媒体およびその製造方法 Download PDFInfo
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- JP4667835B2 JP4667835B2 JP2004339829A JP2004339829A JP4667835B2 JP 4667835 B2 JP4667835 B2 JP 4667835B2 JP 2004339829 A JP2004339829 A JP 2004339829A JP 2004339829 A JP2004339829 A JP 2004339829A JP 4667835 B2 JP4667835 B2 JP 4667835B2
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- 239000001257 hydrogen Substances 0.000 title claims description 94
- 229910052739 hydrogen Inorganic materials 0.000 title claims description 94
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims description 89
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000002245 particle Substances 0.000 claims description 126
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 101
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 87
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 38
- 229910052742 iron Inorganic materials 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 25
- 239000000377 silicon dioxide Substances 0.000 claims description 19
- 239000012798 spherical particle Substances 0.000 claims description 12
- 239000011148 porous material Substances 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 5
- 235000013980 iron oxide Nutrition 0.000 description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 238000003860 storage Methods 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 230000009257 reactivity Effects 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000002994 raw material Substances 0.000 description 7
- 239000010419 fine particle Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 150000002431 hydrogen Chemical class 0.000 description 5
- 238000004438 BET method Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000002407 reforming Methods 0.000 description 3
- 238000001878 scanning electron micrograph Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000003502 gasoline Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000002574 poison Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 238000000629 steam reforming Methods 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 229960002089 ferrous chloride Drugs 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Description
(ステップ1:水素の化学的貯蔵)
Fe2O3+3H2→2Fe+3H2O ・・・(反応式1)
Fe3O4+4H2→3Fe+4H2O ・・・(反応式2)
(ステップ2:水素の発生)
3Fe+4H2O→Fe3O4+4H2 ・・・(反応式3)
S=Ns ・・・(式1)
ここで、Nは試料1g中の粒子個数(個/g)であり、sは粒子1個あたりの外表面積(m2/個)であり、それぞれ以下の式2〜式4で求めることができる。
N=1/W ・・・(式2)
W=4/3π(d/2×10-6)3×7.85×106 ・・・(式3)
s=4π(d/2×10-6)2 ・・・(式4)
なお、Wは粒子1個あたりの重量(g/個)であり、dは平均粒子径(直径:μm)である。また、純鉄の真比重として7.85g/cc(7.85×106g/m3)を用いた。
塩化第一鉄溶液にシリカを500質量ppm含有させて流動焙焼することで略球形の酸化鉄粒子を得た。この酸化鉄粒子を、篩の目開きがそれぞれ6.7mm、4.75mm、4mm、2.8mm、1.7mm、1mm、710μm、500μm、300μm、150μm、75μm、45μm、32μm、20μmである篩を使用して篩分級し、平均粒径が5.6mm、4.4mm、3.5mm、2.4mm、1.2mm、880μm、600μm、350μm、240μm、90μm、60μm、40μm、25μmの13種類の酸化鉄粒子を得た。なお、平均粒径は、走査電子顕微鏡により粒子100個について粒径を測定して平均化した値である。また、粒径は、粒子の横断面形状を同一の横断面積を有する新円に置き換えた場合の直径を測定した。
平均粒径が30nm、70nm、200nmの各酸化鉄微粒子を直径2mmのペレットに加工し、これを温度450℃で水素還元を行い、試料番号14〜16の水素発生媒体を得た。そして、試験例1と同様の手順にて、得られた水素発生媒体を水素発生装置に入れて水素を発生させた。その結果を表1に併記する。
酸化鉄粒子中のシリカの含有量を変化させた点と、篩の目開きが250μmと355μmの篩を用いて篩分級して平均粒径300μmの酸化鉄粒子を得た点を除いて、試験例1と同様の手順にて水素発生媒体(試料番号21〜33)を調製し、それを用いて水素発生試験を行った。その結果を表2に示す。なお、酸化鉄粒子中のシリカ量は、誘導結合プラズマ(ICP)により分析して求めた。
Claims (3)
- 鉄粒子を含んでなる水素発生媒体であって、前記鉄粒子は、粒子形状が略球状であり、略球状粒子の内部に外部とつながる細孔を有するスポンジ状の構造を持ち、平均粒径が30μm以上3mm以下であり、比表面積が前記平均粒径から算出した外部比表面積の100倍以上である水素発生媒体。
- 略球状形状の酸化鉄粒子を得る工程と、
この酸化鉄粒子を平均粒径が40μm以上となるように分級する工程と、
前記分級した酸化鉄粒子を900℃以下で還元ガスに接触させて還元し、粒子形状が略球状であり、略球状粒子の内部に外部とつながる細孔を有するスポンジ状の構造を持ち、平均粒径が30μm以上3mm以下であり、比表面積が前記平均粒径から算出した外部比表面積の100倍以上である鉄粒子を含んでなる水素発生媒体を得る工程と
を含んでなる水素発生媒体の製造方法。 - 前記略球状形状の酸化鉄粒子に含まれるシリカの量が、30質量ppm以上5質量%以下であることを特徴とする請求項2に記載の水素発生媒体の製造方法。
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JP4667835B2 true JP4667835B2 (ja) | 2011-04-13 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20170102942A (ko) | 2015-01-14 | 2017-09-12 | 제이에프이 스틸 가부시키가이샤 | 환원철분 및 그의 제조 방법 그리고 베어링 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4893597A (ja) * | 1972-03-10 | 1973-12-04 | ||
JPS55174937U (ja) * | 1979-06-02 | 1980-12-15 | ||
JPH07506327A (ja) * | 1992-04-24 | 1995-07-13 | エイチ−パワー・コーポレーシヨン | 改良された水素発生システム |
JPH07246333A (ja) * | 1994-01-24 | 1995-09-26 | Ueno Seiyaku Oyo Kenkyusho:Kk | 酸素吸収剤 |
JPH0831431A (ja) * | 1994-07-21 | 1996-02-02 | Matsushita Electric Ind Co Ltd | 熱電池用リチウム負極の製造法 |
JP2002105501A (ja) * | 2000-09-26 | 2002-04-10 | Hoganas Ab | 球形の多孔質鉄粉末およびその製造方法 |
JP2002173301A (ja) * | 2000-12-04 | 2002-06-21 | Sumitomo Precision Prod Co Ltd | 水素エネルギー発生システム |
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- 2004-11-25 JP JP2004339829A patent/JP4667835B2/ja active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4893597A (ja) * | 1972-03-10 | 1973-12-04 | ||
JPS55174937U (ja) * | 1979-06-02 | 1980-12-15 | ||
JPH07506327A (ja) * | 1992-04-24 | 1995-07-13 | エイチ−パワー・コーポレーシヨン | 改良された水素発生システム |
JPH07246333A (ja) * | 1994-01-24 | 1995-09-26 | Ueno Seiyaku Oyo Kenkyusho:Kk | 酸素吸収剤 |
JPH0831431A (ja) * | 1994-07-21 | 1996-02-02 | Matsushita Electric Ind Co Ltd | 熱電池用リチウム負極の製造法 |
JP2002105501A (ja) * | 2000-09-26 | 2002-04-10 | Hoganas Ab | 球形の多孔質鉄粉末およびその製造方法 |
JP2002173301A (ja) * | 2000-12-04 | 2002-06-21 | Sumitomo Precision Prod Co Ltd | 水素エネルギー発生システム |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20170102942A (ko) | 2015-01-14 | 2017-09-12 | 제이에프이 스틸 가부시키가이샤 | 환원철분 및 그의 제조 방법 그리고 베어링 |
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