CN105924202A - 一种柴油机尾气后处理用scr催化剂载体的制备技术 - Google Patents
一种柴油机尾气后处理用scr催化剂载体的制备技术 Download PDFInfo
- Publication number
- CN105924202A CN105924202A CN201610271645.8A CN201610271645A CN105924202A CN 105924202 A CN105924202 A CN 105924202A CN 201610271645 A CN201610271645 A CN 201610271645A CN 105924202 A CN105924202 A CN 105924202A
- Authority
- CN
- China
- Prior art keywords
- powder
- scr catalyst
- catalyst carrier
- diesel engine
- carrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005516 engineering process Methods 0.000 title claims abstract description 22
- 239000003054 catalyst Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 8
- 239000011707 mineral Substances 0.000 claims abstract description 8
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims description 52
- 239000004411 aluminium Substances 0.000 claims description 34
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 34
- 229910052782 aluminium Inorganic materials 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 27
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 13
- 238000012805 post-processing Methods 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 229920003086 cellulose ether Polymers 0.000 claims description 10
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 10
- 238000007493 shaping process Methods 0.000 claims description 10
- 239000004408 titanium dioxide Substances 0.000 claims description 10
- 238000007605 air drying Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 239000005995 Aluminium silicate Substances 0.000 claims description 5
- 208000035126 Facies Diseases 0.000 claims description 5
- 235000010469 Glycine max Nutrition 0.000 claims description 5
- 244000068988 Glycine max Species 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
- 230000032683 aging Effects 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 235000012211 aluminium silicate Nutrition 0.000 claims description 5
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 5
- 239000000314 lubricant Substances 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 238000010298 pulverizing process Methods 0.000 claims description 5
- 239000012744 reinforcing agent Substances 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 239000003381 stabilizer Substances 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 5
- 239000004094 surface-active agent Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims 2
- 239000002253 acid Substances 0.000 claims 1
- 238000001035 drying Methods 0.000 claims 1
- 238000001125 extrusion Methods 0.000 claims 1
- 238000010304 firing Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 claims 1
- 238000004513 sizing Methods 0.000 claims 1
- 239000000919 ceramic Substances 0.000 abstract description 11
- 229910000505 Al2TiO5 Inorganic materials 0.000 abstract description 8
- AABBHSMFGKYLKE-SNAWJCMRSA-N propan-2-yl (e)-but-2-enoate Chemical compound C\C=C\C(=O)OC(C)C AABBHSMFGKYLKE-SNAWJCMRSA-N 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 239000004615 ingredient Substances 0.000 abstract 1
- 239000002075 main ingredient Substances 0.000 abstract 1
- 238000010517 secondary reaction Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 13
- 241000264877 Hippospongia communis Species 0.000 description 12
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000005416 organic matter Substances 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0006—Honeycomb structures
- C04B38/0009—Honeycomb structures characterised by features relating to the cell walls, e.g. wall thickness or distribution of pores in the walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/16—Clays or other mineral silicates
-
- B01J35/56—
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
- C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
- C04B35/478—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on aluminium titanates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/636—Polysaccharides or derivatives thereof
- C04B35/6365—Cellulose or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
Abstract
本发明公开了一种柴油机尾气后处理用SCR催化剂载体的制备技术，它是主要由预先烧制的一次钛酸铝矿物相和二次反应生成的次生钛酸铝矿物相及微量莫来石相组成，并采用蜂窝陶瓷生产工艺制成以钛酸铝矿物相为主莫来石相为辅的低膨胀蜂窝陶瓷载体。该产品的膨胀系数低于0.8×10‑6℃‑1，孔密度400目/英寸2，壁厚0.15‑0.17mm,载体直径大于300mm，A轴抗压强度大于20Mpa,B轴抗压强度大于1.8Mpa，吸水率23‑25%，其膨胀系数低、抗压强度高、钛酸铝热稳定性好，可更好地满足柴油机尾气处理用SCR催化剂载体的高技术高性能需求。
Description
技术领域
本发明涉及催化剂载体领域，具体为一种柴油机尾气后处理用SCR催化剂载体的制备技术。
背景技术
进入二十世纪九十年代以来，能源危机和环境污染两大问题，严重危害人类社会的可持续发展，日益受到各国政府和民间的重视。随着柴油机工业的发展，柴油车保有量的增加，对能源和环境的压力日益加剧，新的排放法规的要求日趋严格，研究开发低排放、低油耗的汽车新技术势在必行。柴油机作为一种高效节能的动力机械，在机动车动力中占据着越来越重要的地位。柴油机尾气排放的主要污染物为NOx。随着尾气排放法规的日益严格，排气后处理技术成为了减少尾气污染的重要手段。
在柴油机尾气排放后处理技术中，SCR技术是目前世界各国特别是欧盟各国普遍采用的控制柴油机尾气排放的一项成熟技术。SCR的基本工作原理是系统将尿素溶液喷射到柴油机的尾气管中，尿素分解产生的氨与尾气混合，经过催化反应器还原NOx生成氮气和水，达到净化尾气的目的。目前生产使用的催化反应器有两种：一种是蜂窝陶瓷载体，另一种是蜂窝金属载体。由于蜂窝陶瓷载体的各项性能远高于蜂窝金属载体，在国内外已大量使用。就蜂窝陶瓷载体材料而言，堇青石和钛酸铝是目前最主要的材料，钛酸铝材料与堇青石比较具有更低的膨胀系数和更突出的热稳定性和化学稳定性，越来越受到人们的广泛重视。而在我们国产的钛酸铝质载体目前还处于开发阶段，虽然也有研究机构开发出样品，但最终的产品性能很难推广应用。因此开发一种膨胀系数低、抗压强度高、钛酸铝热稳定性好，可更好地满足柴油机尾气处理用SCR催化剂载体的高技术高性能需求。
发明内容
本发明的目的就在于克服上述不足，提供了一种柴油机尾气后处理用SCR催化剂载体的制备技术，具体包含下列步骤：
（1）钛酸铝预制粉的制备：取摩尔比1:1的工业氧化铝粉和钛白粉，外加摩尔百分比为1-2%的轻烧镁粉和摩尔百分比为1-3%的氧化镧粉作为稳定剂和增强剂， 以纤维素醚、豆油等有机物作为成型助剂，并加入适量水进行捏合，采用挤出成型工艺获得坯体，热风干燥排出水分后切割成规则产品，经过1450-1500℃进行烧结处理。然后经过粉碎加工、分级处理后得到平均粒径1-4um的钛酸铝预制粉。
（2）泥料制备：取钛酸铝预制粉70-80%、二氧化钛粉7-9%、高温氧化铝粉8-10%、生高岭土粉5-8%、氧化硅粉0.5-1%、滑石粉4-6%准确配料后进行无重力干粉混合，添加2.8-3.5%纤维素醚作为成型助剂、加水20-25%、表面活性剂1-2%和润滑剂1-2%后混炼成泥。
（3）将步骤（2）的泥料加入真空炼泥机中进行炼泥，然后困料24小时；
（4）将步骤（3）混炼后的泥料经挤压机挤压成型得到蜂窝陶瓷载体的湿坯，规格为孔密度400目/英寸2，壁厚0.15-0.17mm,载体直径330mm；
（5）将步骤（4）的湿坯微波定型，并按曲线进行热风干燥成干坯；
（6）将步骤（5）的干坯经1450℃的温度下焙烧，保温2-3小时，冷却后得到成品。
本发明的有益效果为：按本发明中的制备技术得到的载体主要由预先烧制的一次钛酸铝矿物相和反应生成的次生钛酸铝矿物相及微量莫来石相组成，并采用蜂窝陶瓷生产工艺制成以钛酸铝矿物相为莫来石相为辅的低膨胀蜂窝陶瓷载体，保留了钛酸铝材料低膨胀和耐高温的特性，同时由于少量的次生钛酸铝和莫来石相分散在一次钛酸铝相的缝隙中，即克服了钛酸铝蜂窝载体难以烧结的强度低的问题，同时也抑制了钛酸铝的分解，提高钛酸铝的稳定性。
具体实施方式
下面结合实施例对本发明做进一步说明。
实施例1
一种柴油机尾气后处理用SCR催化剂载体的制备技术，具体包含下列步骤：
（1）钛酸铝预制粉的制备：取摩尔比1:1的工业氧化铝粉和钛白粉，外加摩尔百分比为1-2%的轻烧镁粉和摩尔百分比为1-3%的氧化镧粉作为稳定剂和增强剂， 以纤维素醚、豆油等有机物作为成型助剂，并加入适量水进行捏合，采用挤出成型工艺获得坯体，热风干燥排出水分后切割成规则产品，经过1450-1500℃进行烧结处理。然后经过粉碎加工、分级处理后得到平均粒径1-4um的钛酸铝预制粉。
（2）泥料制备：取钛酸铝预制粉70%、二氧化钛粉7%、高温氧化铝粉10%、生高岭土粉8%、氧化硅粉1%、滑石粉4%准确配料后进行无重力干粉混合，添加2.8%纤维素醚作为成型助剂、加水20%、表面活性剂1%和润滑剂1%后混炼成泥。
（3）将步骤（2）的泥料加入真空炼泥机中进行炼泥，然后困料24小时；
（4）将步骤（3）混炼后的泥料经挤压机挤压成型得到蜂窝陶瓷载体的湿坯，规格为孔密度400目/英寸2，壁厚0.15-0.17mm,载体直径330mm；
（5）将步骤（4）的湿坯微波定型，并按曲线进行热风干燥成干坯；
（6）将步骤（5）的干坯经1450℃的温度下焙烧，保温2-3小时，冷却后得到成品。
实施例2
一种柴油机尾气后处理用SCR催化剂载体的制备技术，具体包含下列步骤：
（1）钛酸铝预制粉的制备：取摩尔比1:1的工业氧化铝粉和钛白粉，外加摩尔百分比为1-2%的轻烧镁粉和摩尔百分比为1-3%的氧化镧粉作为稳定剂和增强剂， 以纤维素醚、豆油等有机物作为成型助剂，并加入适量水进行捏合，采用挤出成型工艺获得坯体，热风干燥排出水分后切割成规则产品，经过1450-1500℃进行烧结处理。然后经过粉碎加工、分级处理后得到平均粒径1-4um的钛酸铝预制粉。
（2）泥料制备：取钛酸铝预制粉80%、二氧化钛粉8%、高温氧化铝粉8%、生高岭土粉7.5%、氧化硅粉0.5%、滑石粉6%准确配料后进行无重力干粉混合，添加3.5%纤维素醚作为成型助剂、加水25%、表面活性剂2%和润滑剂2%后混炼成泥。
（3）将步骤（2）的泥料加入真空炼泥机中进行炼泥，然后困料24小时；
（4）将步骤（3）混炼后的泥料经挤压机挤压成型得到蜂窝陶瓷载体的湿坯，规格为孔密度400目/英寸2，壁厚0.15-0.17mm,载体直径330mm；
（5）将步骤（4）的湿坯微波定型，并按曲线进行热风干燥成干坯；
（6）将步骤（5）的干坯经1450℃的温度下焙烧，保温2-3小时，冷却后得到成品。
实施例3
一种柴油机尾气后处理用SCR催化剂载体的制备技术，具体包含下列步骤：
（1）钛酸铝预制粉的制备：取摩尔比1:1的工业氧化铝粉和钛白粉，外加摩尔百分比为1-2%的轻烧镁粉和摩尔百分比为1-3%的氧化镧粉作为稳定剂和增强剂， 以纤维素醚、豆油等有机物作为成型助剂，并加入适量水进行捏合，采用挤出成型工艺获得坯体，热风干燥排出水分后切割成规则产品，经过1450-1500℃进行烧结处理。然后经过粉碎加工、分级处理后得到平均粒径1-4um的钛酸铝预制粉。
（2）泥料制备：取钛酸铝预制粉71%、二氧化钛粉9%、高温氧化铝粉9%、生高岭土粉5%、氧化硅粉1%、滑石粉5%准确配料后进行无重力干粉混合，添加3.2%纤维素醚作为成型助剂、加水22%、表面活性剂1.5%和润滑剂1.5%后混炼成泥。
（3）将步骤（2）的泥料加入真空炼泥机中进行炼泥，然后困料24小时；
（4）将步骤（3）混炼后的泥料经挤压机挤压成型得到蜂窝陶瓷载体的湿坯，规格为孔密度400目/英寸2，壁厚0.15-0.17mm,载体直径330mm；
（5）将步骤（4）的湿坯微波定型，并按曲线进行热风干燥成干坯；
（6）将步骤（5）的干坯经1450℃的温度下焙烧，保温2-3小时，冷却后得到成品。
按以上方法制备的载体的膨胀系数低于0.8×10-6℃-1，孔密度400目/英寸2，壁厚0.15-0.17mm,载体直径大于300mm，A轴抗压强度大于20Mpa,B轴抗压强度大于1.8Mpa，吸水率23-25%，其膨胀系数低、抗压强度高、钛酸铝热稳定性好，可更好地满足柴油机尾气处理用SCR催化剂载体的高技术高性能需求。
Claims (4)
1.一种柴油机尾气后处理用SCR催化剂载体的制备技术，其特征在于：所述制备技术中的原料配方为，钛酸铝预制粉70-80%、二氧化钛粉7-9%、高温氧化铝粉8-10%、生高岭土粉5-8%、氧化硅粉0.5-1%、滑石粉4-6%；
制备方法为，上述原料经过配料后进行无重力干粉混合，添加2.8-3.5%纤维素醚作为成型助剂、加水20-25%、表面活性剂1-2%和润滑剂1-2%后混炼成泥，然后经过困料、真空练泥、挤出、微波定型、烘干、烧成工序，制得一种柴油机尾气处理用SCR催化剂载体。
2.根据权利要求1所述的一种柴油机尾气后处理用SCR催化剂载体的制备技术，其特征在于：所述配方中的钛酸铝预制粉为预先烧制的一次稳定型钛酸铝粉，具体的制备方法为，取摩尔比为1:1的氧化铝粉和钛白粉，外加摩尔百分比为1-2%的轻烧镁粉和摩尔百分比为1-3%的氧化镧粉作为稳定剂和增强剂，加入纤维素醚或豆油作为成型助剂，并加入适量水进行捏合，采用挤出成型工艺获得坯体，热风干燥排出水分后切割成规则产品，经过1450～1500℃进行烧结处理；然后经过粉碎加工、分级处理后得到钛酸铝预制粉。
3.根据权利要求1所述的一种柴油机尾气后处理用SCR催化剂载体的制备技术，其特征在于：所述的钛酸铝预制粉的粒径为1-4μm。
4.根据权利要求1所述的一种柴油机尾气后处理用SCR催化剂载体的制备技术所制得的载体，其特征在于：所述的载体由预先烧制的一次钛酸铝矿物相和反应生成的次生钛酸铝矿物相及微量莫来石相组成。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610271645.8A CN105924202B (zh) | 2016-04-28 | 2016-04-28 | 一种柴油机尾气后处理用scr催化剂载体的制备技术 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610271645.8A CN105924202B (zh) | 2016-04-28 | 2016-04-28 | 一种柴油机尾气后处理用scr催化剂载体的制备技术 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105924202A true CN105924202A (zh) | 2016-09-07 |
| CN105924202B CN105924202B (zh) | 2019-01-04 |
Family
ID=56836391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610271645.8A Active CN105924202B (zh) | 2016-04-28 | 2016-04-28 | 一种柴油机尾气后处理用scr催化剂载体的制备技术 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105924202B (zh) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107321176A (zh) * | 2017-06-27 | 2017-11-07 | 中国第汽车股份有限公司 | 一种无机氧化物复合的整体式scr催化反应器的制备方法 |
| CN108837823A (zh) * | 2018-06-15 | 2018-11-20 | 万华化学集团股份有限公司 | 一种钙钛矿型催化剂及其整体式成型方法和应用 |
| CN108889296A (zh) * | 2018-07-31 | 2018-11-27 | 包头稀土研究院 | Scr催化剂浆液及其制备方法和应用 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1812945A (zh) * | 2003-07-29 | 2006-08-02 | 王世来股份有限公司 | 废气净化催化剂用蜂窝状载体及其制造方法 |
| CN101074161A (zh) * | 2007-04-14 | 2007-11-21 | 安徽宁国市先浩高温材料有限公司 | 一种钛酸铝－莫来石质蜂窝陶瓷及其制备方法 |
| CN101456730A (zh) * | 2007-12-11 | 2009-06-17 | 王碧君 | 高强度钛酸铝陶瓷 |
| CN105126797A (zh) * | 2015-07-21 | 2015-12-09 | 天津霍普环保科技有限公司 | 一种蜂窝陶瓷负载纳米二氧化钛光催化剂及其制备方法 |
-
2016
- 2016-04-28 CN CN201610271645.8A patent/CN105924202B/zh active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1812945A (zh) * | 2003-07-29 | 2006-08-02 | 王世来股份有限公司 | 废气净化催化剂用蜂窝状载体及其制造方法 |
| CN101074161A (zh) * | 2007-04-14 | 2007-11-21 | 安徽宁国市先浩高温材料有限公司 | 一种钛酸铝－莫来石质蜂窝陶瓷及其制备方法 |
| CN101456730A (zh) * | 2007-12-11 | 2009-06-17 | 王碧君 | 高强度钛酸铝陶瓷 |
| CN105126797A (zh) * | 2015-07-21 | 2015-12-09 | 天津霍普环保科技有限公司 | 一种蜂窝陶瓷负载纳米二氧化钛光催化剂及其制备方法 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107321176A (zh) * | 2017-06-27 | 2017-11-07 | 中国第汽车股份有限公司 | 一种无机氧化物复合的整体式scr催化反应器的制备方法 |
| CN108837823A (zh) * | 2018-06-15 | 2018-11-20 | 万华化学集团股份有限公司 | 一种钙钛矿型催化剂及其整体式成型方法和应用 |
| CN108837823B (zh) * | 2018-06-15 | 2022-04-22 | 万华化学集团股份有限公司 | 一种钙钛矿型催化剂及其整体式成型方法和应用 |
| CN108889296A (zh) * | 2018-07-31 | 2018-11-27 | 包头稀土研究院 | Scr催化剂浆液及其制备方法和应用 |
| CN108889296B (zh) * | 2018-07-31 | 2021-04-02 | 包头稀土研究院 | Scr催化剂浆液及其制备方法和应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105924202B (zh) | 2019-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101443288B (zh) | 用于多孔壁流过滤器的反应性粘合剂 | |
| CN103769239B (zh) | 具有多级孔结构的蜂窝型脱硝催化剂及其制备方法 | |
| CN101428215B (zh) | 一种烟气脱硝催化剂的制备方法及由该方法制备的烟气脱硝催化剂 | |
| US9957200B2 (en) | Composition for improved manufacture of substrates | |
| CN103007923A (zh) | 一种scr脱硝催化剂及其制备方法 | |
| CN105964284A (zh) | 蜂窝状低温烟气脱硝催化剂及其制备方法 | |
| CN101791549B (zh) | 超声混合沉淀法制备成型选择性催化还原脱硝催化剂的方法 | |
| CN105924202A (zh) | 一种柴油机尾气后处理用scr催化剂载体的制备技术 | |
| CN107362822B (zh) | 一种整体式分子筛scr催化反应器的制备方法 | |
| CN104741113A (zh) | 一种低成本的脱硝催化剂及其制备方法 | |
| CN104030720A (zh) | 一种零烧成收缩的堇青石蜂窝陶瓷载体及其制备方法 | |
| CN103601480A (zh) | 一种用于柴油机碳烟颗粒捕集的过滤体及其制备方法 | |
| CN103641507A (zh) | 一种沸石和凹凸棒土复合基蜂窝体及其制备方法 | |
| CN103301831A (zh) | 一种脱除排放废气中氮氧化物的催化剂及其制备方法 | |
| CN109608227A (zh) | 低膨胀高强度薄壁高孔密度蜂窝陶瓷载体 | |
| CN104387108A (zh) | 一种超大尺寸堇青石质蜂窝陶瓷载体及其生产工艺 | |
| CN105481367A (zh) | 用于柴油机碳烟颗粒捕集的过滤体及其制备方法 | |
| CN114011400A (zh) | 酸性体系垃圾焚烧scr脱硝催化剂的制备方法、制得的脱硝催化剂 | |
| CN104437586A (zh) | 一种泡沫式低温烟气脱硝催化剂及其配制方法 | |
| CN105148961A (zh) | 一种scr烟气脱硝催化剂及其制备方法 | |
| CN115819107B (zh) | 低热膨胀系数堇青石质蜂窝陶瓷载体、制备方法及应用 | |
| CN107321176A (zh) | 一种无机氧化物复合的整体式scr催化反应器的制备方法 | |
| CN115893983A (zh) | 蜂窝陶瓷载体生坯回坯料制备蜂窝陶瓷载体的方法及载体 | |
| CN102924068B (zh) | 一种高温废气净化用壁流式蜂窝陶瓷过滤体及其制备方法 | |
| CN102212735B (zh) | 多孔NiAl/Al2TiO5复合材料及其制备方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 454750 Jiaozuo, Mengzhou Industrial Zone, Pearl River Road, No. 48, No. Applicant after: Henan Green Voight Environmental Protection Technology Co., Ltd. Address before: 454750 Mengzhou high tech Development Zone, Henan City, Henan province Green purifier Limited by Share Ltd Applicant before: Henan Green Water Purifier Co., Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |