摘要:
A method for the direct synthesis of a crystalline material with the AEI zeolithic structure containing iron-species and being essentially free of alkali ions, comprising the following steps: (i) preparation of a mixture containing water, a high-silica zeolite as a main source of silica and alumina, an alkyl-substituted cyclic ammonium cation as organic structure directing agent (OSDA), a source of iron, and a source of an alkali metal ion [Alk], to obtain a final synthesis mixture having the following molar composition: SiO 2 : a AI 2 O 3 : b Fe : c OSDA : d Alk : e H 2 O wherein a is in the range from 0.001 to 0.2; wherein b is in the range from 0.001 to 0.2; wherein c is in the range from 0.01 to 2; wherein d is in the range from 0.001 to 2; wherein e is in the range from 1 to 200; (ii) crystallization of the mixture achieved in (i); (iii) recovery of the crystalline material achieved in (ii); (iv) calcination of the crystalline material from step (iii); and (v) removal of the alkali metal cation, present in the calcined crystalline material after step (iv) to obtain a final molar composition: SiO 2 : o AI 2 O 3 : p Fe : q Alk wherein o is in the range from 0.001 to 0.2, p is in the range from 0.001 to 0.2 and q is below 0.02.
摘要:
Both a system and a method for scrubbing a contaminated gas stream with a glycerol solution are disclosed. The system includes a contaminated gas stream in need of purification, along with a column which receives the contaminated gas stream. A glycerol solution is also received by the column and is used to scrub the contaminated gas stream in the column. The glycerol solution is used to reduce at least three contaminants from the gas stream, and includes greater than 50% glycerol and less than 98% glycerol. In one embodiment, the glycerol solution includes between 0.5% to 10% salts, wherein the salts are sodium based, potassium based or a combination thereof. The salts act catalytically to convert glycerol and carbon dioxide to glycerol carbonate.
摘要:
機関排気通路内に上流側から順に炭化水素供給弁(16)と、酸化触媒(13)と、排気浄化触媒(14)とが配置される。排気浄化触媒(14)に流入する排気ガスの空燃比をリーンに維持しつつ予め定められた周期でもって低下させることによりNO X を硝酸塩の形で吸蔵させることなくNO X を浄化する第1のNO X 浄化方法と、排気浄化触媒(14)に流入する排気ガスの空燃比を上述の周期よりも長い周期でもってリーンからリッチに切換えることによりNO X を浄化する第2のNO X 浄化方法とが機関の運転状態に応じて選択的に用いられる。
摘要:
This invention relates to a carbon monoxide combustion catalyst and to a method of making the catalyst used in fluid bed catalytic cracking process. In particular, the preparation of carbon monoxide combustion catalyst containing metals and other composites which promote oxidation of carbon monoxide to carbon dioxide during regeneration of spent FCC catalyst. The method describes the use of spent FCC catalyst by way of modification.
摘要:
A CO 2 control device for capturing CO 2 from exhaust from a vehicle, including: a flow- through apparatus; and an CO 2 absorbing filter treated with an alkaline material and housed within the flow-through apparatus; wherein the flow-through apparatus receives the exhaust from the vehicle; and wherein CO 2 from the exhaust is absorbed by the CO 2 absorbing filter.
摘要:
Sulfur oxides are removed in the regenerator zone and rapidly released as H2S in the reactor zone of an FCC system employing a particulate SOx catalytic/absorbent comprising Cu and/or Ag, an alkali metal oxide, MgO, V2O5 and a clay binder.
摘要翻译:在再生器区域中除去硫氧化物,并使用包含Cu和/或Ag,碱金属氧化物,MgO,V 2 O 5和粘土粘合剂的颗粒SO x催化剂/吸收剂在FCC系统的反应器区域中作为H 2 S快速释放。
摘要:
A multi-zoned catalytic trap for conversion of NO>x , a platinum catalytic component in the amount of 0 to about 100 g/ft and a rhodium catalytic component in the amount of 0 to about 10 g/ft ; and a NOx sorbent comprising one or more basic oxygenated compounds of one or more alkaline earth metals and optionally, one or more basic oxygenated compounds of one or more alkali metals. In the second zone, the catalytic trap material comprises a refractory metal oxide support having dispersed thereon a palladium catalytic component in the amount of 0 to about 50 g/ft , a platinum catalytic component in the amount of about 10 to about 100 g/ft and a rhodium catalytic component in the amount of about 5 to about 20 g/ft ; and a NOx sorbent comprising one or more basic oxygenated compounds of one or more metals selected from the group consisting of alkali metals and alkaline earth metals. In the optional zone(s), the catalytic trap material comprises a refractory metal oxide support having dispersed thereon a palladium catalytic component in the amount of about 25 to about 75 g/ft , a platinum catalytic component in the amount of about 5 to about 30 g/ft and a rhodium catalytic component in the amount of 0 to about 10 g/ft ; and a NOx sorbent comprising one or more basic oxygenated compounds of one or more metals selected from the group consisting of alkali metals and alkaline earth metals.
摘要翻译:用于转化来自发动机的排气流中的NO> x u>的多区域催化阱,该发动机以稀薄和化学计量或富含条件之间的周期性交替操作。 催化捕集器包括第一区域,第二区域和可选地设置在第一区域和第二区域之间的一个或多个中间区域。 每个区域包括涂覆在耐火载体构件上的催化捕集材料。 在第一区域中,催化捕集材料包含其上分散有约30至约300g / ft 3的量的钯催化组分的难熔金属氧化物载体,其量为0至约100的铂催化组分 g / ft 3和铑催化组分,其量为0至约10g / ft 3; 以及包含一种或多种碱土金属的一种或多种碱性氧化化合物和任选的一种或多种一种或多种碱金属的碱性氧化化合物的NOx吸附剂。 在第二区域中,催化捕集材料包括其上分散有0至约50g / ft 3的钯催化组分的难熔金属氧化物载体,其量为约10至约100的铂催化组分 g / ft 3和约5至约20g / ft 3的量的铑催化组分; 和包含一种或多种选自碱金属和碱土金属的一种或多种金属的碱性氧化化合物的NOx吸附剂。 在可选区域中,催化捕集材料包括其上分散有约25至约75g / ft 3的钯催化组分的难熔金属氧化物载体,其量为约 5至约30g / ft 3,铑催化组分的量为0至约10g / ft 3; 和包含一种或多种选自碱金属和碱土金属的一种或多种金属的碱性氧化化合物的NOx吸附剂。
摘要:
A method of decomposing the oxides of nitrogen present in a gas. The gas is in contact with a catalyst containing a peroxide defect and doped with a metal from Group 1 or Group 2 of the periodic table. The metal oxide preferred has a cubic crystal structure.
摘要:
Die vorliegende Erfindung betrifft eine Katalysatoranordnung, die a) einen Dreiwegekatalysator A auf einem Trägersubstrat T A b) einen Katalysator B auf einem Trägersubstrat T B , der zwei Materialzonen B1 und B2 umfasst, und/oder c) einen Katalysator C auf einem Trägersubstrat T C, der zwei Materialzonen C1 und C2 umfasst, umfasst.