JP7244444B2 - 脱硝触媒構造体 - Google Patents
脱硝触媒構造体 Download PDFInfo
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- JP7244444B2 JP7244444B2 JP2020011464A JP2020011464A JP7244444B2 JP 7244444 B2 JP7244444 B2 JP 7244444B2 JP 2020011464 A JP2020011464 A JP 2020011464A JP 2020011464 A JP2020011464 A JP 2020011464A JP 7244444 B2 JP7244444 B2 JP 7244444B2
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- 239000003054 catalyst Substances 0.000 title claims description 165
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 14
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 10
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 4
- 229910000476 molybdenum oxide Inorganic materials 0.000 claims description 4
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims description 4
- 229910001930 tungsten oxide Inorganic materials 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 229910001935 vanadium oxide Inorganic materials 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 40
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 11
- 239000010936 titanium Substances 0.000 description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 7
- 239000002994 raw material Substances 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- -1 titanium alkoxide Chemical class 0.000 description 2
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 1
- 229940010552 ammonium molybdate Drugs 0.000 description 1
- 235000018660 ammonium molybdate Nutrition 0.000 description 1
- 239000011609 ammonium molybdate Substances 0.000 description 1
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- XAYGUHUYDMLJJV-UHFFFAOYSA-Z decaazanium;dioxido(dioxo)tungsten;hydron;trioxotungsten Chemical compound [H+].[H+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O XAYGUHUYDMLJJV-UHFFFAOYSA-Z 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- DCKVFVYPWDKYDN-UHFFFAOYSA-L oxygen(2-);titanium(4+);sulfate Chemical compound [O-2].[Ti+4].[O-]S([O-])(=O)=O DCKVFVYPWDKYDN-UHFFFAOYSA-L 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- YOUIDGQAIILFBW-UHFFFAOYSA-J tetrachlorotungsten Chemical compound Cl[W](Cl)(Cl)Cl YOUIDGQAIILFBW-UHFFFAOYSA-J 0.000 description 1
- 229910000348 titanium sulfate Inorganic materials 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 150000003682 vanadium compounds Chemical class 0.000 description 1
- UUUGYDOQQLOJQA-UHFFFAOYSA-L vanadyl sulfate Chemical compound [V+2]=O.[O-]S([O-])(=O)=O UUUGYDOQQLOJQA-UHFFFAOYSA-L 0.000 description 1
- 229940041260 vanadyl sulfate Drugs 0.000 description 1
- 229910000352 vanadyl sulfate Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
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Description
個々の板状触媒エレメントは、平らな板状を成した平坦部と上面および下面にそれぞれ凸条を有する板状を成した凹凸部とを交互にそれぞれ複数有し、且つ各凸条は板状触媒エレメントのガス流入側に在る縁の延在方向に対して50°以上85°以下の角度θで斜めに且つ相互に平行に配置されており、
一の板状触媒エレメントの上面にある凸条の稜線と隣接する他の一の板状触媒エレメントの下面にある凸条の稜線とが交差して接するように配置されており、
該交差する点のうちの少なくとも一つが、板状触媒エレメントのガス流入側に在る縁から内側に向かって0mm超過且つ25mm未満の範囲xに在る、
脱硝触媒ユニット。
板状触媒エレメントは、平らな板状を成した平坦部と上面および下面にそれぞれ凸条を平行に有する板状を成した凹凸部とを交互にそれぞれ複数有し、且つ各凸条は板状触媒エレメントのガス流入側に在る縁の延在方向に対して50°以上85°以下の角度θで斜めに且つ相互に平行に配置されており、
複数枚の板状触媒エレメントを、ガス流入側に在る縁と両脇に在る縁とを揃えて、且つ一の板状触媒エレメントの上面にある凸条の稜線と隣接する他の一の板状触媒エレメントの下面にある凸条の稜線とが交差して接するように配置されて、積み重ねたときに、該交差する点のうちの少なくとも一つが、板状触媒エレメントのガス流入側に在る縁から内側に向かって0mm超過且つ25mm未満の範囲xに在る、
板状触媒エレメント。
Ti元素に対するV元素の割合は、V2O5/TiO2の重量百分率として、好ましくは2重量%以下、より好ましくは1重量%以下である。Ti元素に対するMo元素および/またはW元素の割合は、モリブデンの酸化物とタングステンの酸化物とを併用する場合(MoO3+WO3)/TiO2の重量百分率として、好ましくは10重量%以下、より好ましくは5重量%以下である。
バナジウムの酸化物の原料として、五酸化バナジウム、メタバナジン酸アンモニウム、硫酸バナジル等のバナジウム化合物を用いることができる。
タングステンの酸化物の原料として、パラタングステン酸アンモニウム、メタタングステン酸アンモニウム、三酸化タングステン、塩化タングステン等を用いることができる。
モリブデンの酸化物の原料として、モリブデン酸アンモニウム、三酸化モリブデンなどを用いることができる。
図2に示す板状触媒エレメントBは、図1に示す板状触媒エレメントAの前後を入れ替えて裏返しにしたものである。このように裏返すと、板状触媒エレメントAの前面(ガス流入)側に在る縁における凹凸部の断面はZ字状の波形を成し、板状触媒エレメントBの前面(ガス流入)側に在る縁における凹凸部の断面は逆Z字状の波形を成す。図3、図5および図6に示すように、板状触媒エレメントAの上面の凸条の稜線と板状触媒エレメントBの下面の凸条の稜線とが交差して接する点6(図5)と、板状触媒エレメントAの下面の凸条の稜線と板状触媒エレメントBの上面の凸条の稜線とが交差して接する点6’(図6)がガス流入側に在る縁からほぼ同じ距離の位置において左右に交互にシフトして配置される。板状触媒エレメントAと板状触媒エレメントBのように一の板状エレメントを前後反転裏返して使用する場合、少なくとも一つの交差する点を範囲xに存在させるために、W3とW4との差が2x/(tanθ)であることが好ましい。
角度θが75°、p0が30mmの、板状触媒エレメントを重ね合わせて交差する点6,6’の位置がガス流入側に在る縁から30mmになるように脱硝触媒ユニットを組み立てた。これに模擬燃焼排ガスを流して、圧力損失及び脱硝率を測定した。
角度θが75°、p0が30mmの、板状触媒エレメントAを図3~6に示すように重ね合わせて交差する点6,6’の位置がガス流入側に在る縁から10mmになるように脱硝触媒ユニットを組み立てた。これに模擬燃焼排ガスを流して、圧力損失及び脱硝率を測定した。
2:凹凸部
3:上面の凸条
4:上面の凹条
3’:下面の凸条
4’:下面の凹条
5:枠体
A:板状触媒エレメント
B:板状触媒エレメント
6:板状触媒エレメントAの上面の稜線と板状触媒エレメントBの下面の稜線とが交差する点
6’:板状触媒エレメントAの下面の稜線と板状触媒エレメントBの上面の稜線とが交差する点
G:流入ガス
G’:流出ガス
Claims (8)
- ガス流入側に在る縁とガス流出側に在る縁と両脇にそれぞれ在る縁とを有する板状触媒エレメントを、ガス流入側に在る縁と両脇に在る縁とをそれぞれ揃えて、複数枚積み重ねて成る脱硝触媒ユニットであって、
個々の板状触媒エレメントは、平らな板状を成した平坦部と上面および下面にそれぞれ凸条を有する板状を成した凹凸部とを交互にそれぞれ複数有し、且つ各凸条は板状触媒エレメントのガス流入側に在る縁の延在方向に対して50°以上85°以下の角度で斜めに且つ相互に平行に配置されており、
一の板状触媒エレメントの上面にある凸条の稜線と隣接する他の一の板状触媒エレメントの下面にある凸条の稜線とが交差して接するように配置されており、
該交差する点のうち板状触媒エレメントのガス流入側に在る縁から一つ目の交差する点が板状触媒エレメントのガス流入側に在る縁から内側に向かって4mm以上且つ25mm未満の範囲に在る、
脱硝触媒ユニット。 - 個々の板状触媒エレメントは、板状基材とそれに担持された触媒成分とを含有してなるものである、請求項1に記載の脱硝触媒ユニット。
- ガス流入側に在る縁とガス流出側に在る縁と両脇にそれぞれ在る縁とを有する板状触媒エレメントであって、
板状触媒エレメントは、平らな板状を成した平坦部と上面および下面にそれぞれ凸条を有する板状を成した凹凸部とを交互にそれぞれ複数有し、且つ各凸条は板状触媒エレメントのガス流入側に在る縁の延在方向に対して50°以上85°以下の角度で斜めに且つ相互に平行に配置されており、
複数枚の板状触媒エレメントを、ガス流入側に在る縁と両脇に在る縁とをそれぞれ揃えて、且つ一の板状触媒エレメントの上面にある凸条の稜線と隣接する他の一の板状触媒エレメントの下面にある凸条の稜線とが交差して接するように配置されて、積み重ねたときに、該交差する点のうちの板状触媒エレメントのガス流入側に在る縁から一つ目の交差する点が板状触媒エレメントのガス流入側に在る縁から内側に向かって4mm以上且つ25mm未満の範囲に在る、
板状触媒エレメント。 - 板状基材とそれに担持された触媒成分とを含有してなる、請求項3に記載の板状触媒エレメント。
- 板状触媒エレメントのガス流入側に在る縁の延在方向に対する、各凸条の傾き角度の下限は、65°である、請求項1に記載の脱硝触媒ユニット。
- 触媒成分が、チタンの酸化物、モリブデンおよび/またはタングステンの酸化物、ならびにバナジウムの酸化物を含有して成るものであり、V2O5/TiO2の重量百分率が2重量%以下であり、且つ(MoO3+WO3)/TiO2の重量百分率が10重量%以下である、請求項2に記載の脱硝触媒ユニット。
- 板状触媒エレメントのガス流入側に在る縁の延在方向に対する、各凸条の傾き角度の下限は、65°である、請求項3に記載の板状触媒エレメント。
- 触媒成分が、チタンの酸化物、モリブデンおよび/またはタングステンの酸化物、ならびにバナジウムの酸化物を含有して成るものであり、V2O5/TiO2の重量百分率が2重量%以下であり、且つ(MoO3+WO3)/TiO2の重量百分率が10重量%以下である、請求項4に記載の板状触媒エレメント。
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