is essential for the precise determination of the structural and electrochemical changes in Pt/C catalysts ... To understand the degradation mechanism of the catalysts, an accelerated durability test (ADT) was conducted ... because of the limitations of a batch-type three-electrode system, leading to the misunderstanding of the deactivation
decomposition behavior and deactivated catalysts were analyzed. ... To determine the cause of carbonaceous catalyst deactivation and to produce high-value carbon, methane ... rapid deactivation as crystalline carbon grew at surface defects; after 15 min of reaction, approximately
interaction between FeN4 and titanium carbide for durable 4-electron oxygen reduction reaction suppressing catalyst ... deactivation by peroxide, Advancing dry etch process with low global warming potential gases toward ... structured phase-change materials and memory, Cu2O(100) surface as an active site for catalytic furfural
실험 이론1) 촉매(catalyst): 촉매(觸媒, catalyst)는 반응 과정에서 소모되거나 변하지 않으면서 반응속도를 빠르게 만드는 물질. ... 너무 작으면 확산저항을 일으킨다.- 확산 저항: 반응물이 active site로 가기까지 시간이 오래 걸림으로 오히려 activity가 감소한다.② stability (안정성)- deactivation
combination with the traditionally copper halide catalyst to form the catalyst complex.: 리간드는 선택되는 용매 ... deactivation of the polymer chains during polymerization, therefore greatly affecting the kinetics of ... most studied catalysts are those that include copper, which has shown the most versatility with successful
Cationic & anionicst (heterogeneous), metallocene catalyst(homogeneous) Liquid crystal Liquid is anisotropic ... Reversible-deactivation radical polymerization Active site is living so if monomer is supplied, growth ... Thermal conductivity is changed.
and purification from reaction mixture synthesized using 3-bromothiophene, hexylmagnesium bromide, Ni catalyst ... When water was added, the remaining reagents in the reaction mixture were deactivated. ... Perform the purification of the crude using chromatography and monitor the column chromatography.
There were studies on the remanufacturing effect of DOC catalystdeactivated by diesel vehicle smoke ... in exhaust flows, and exhaust flow control units that reduce exhaust gas backflow effects caused by ... This study also developed an optimized system for complete combustion of smoke generated by institutions
There were studies on the remanufacturing effect of DOC catalystdeactivated by diesel vehicle smoke ... This study is also to develop an exhaust flow control unit suitable for an exhaust engine to completely ... in exhaust flows, and exhaust flow control units that reduce exhaust gas backflow effects caused by
There were studies on the remanufacturing effect of DOC catalystdeactivated by diesel vehicle smoke ... in exhaust flows, and exhaust flow control units that reduce exhaust gas backflow effects caused by ... reduction device, analysis of vehicle fire accident cases caused by damage to diesel vehicle smoke reduction
There were studies on the remanufacturing effect of DOC catalystdeactivated by diesel vehicle smoke ... in exhaust flows, and exhaust flow control units that reduce exhaust gas backflow effects caused by ... reduction device, analysis of vehicle fire accident cases caused by damage to diesel vehicle smoke reduction
to the surface of the catalysts, and active component reimpregnation for reactivating catalytic activity ... All prepared catalysts were characterized by the optical microscopes, SEM, EDX, porosimeter and BET to ... The remanufacturing process of the deactivated DOCs includes high temperature cleaning of incineration
carbond. • Step 3: Take a proton away Proton transfer to FeCl 4 – forms HCl , regenerates the Lewis acid catalyst ... of Substituents on Further Electrophilic Aromatic Substitution Lists the directing and activating-deactivating ... For comparison, an alkane with six carbons has a molecular formula of C 6 H 14 , and a cycloalkane with
It should be noted that defect sites can cause CO poisoning, thereby deactivating the anode gradually ... Carbon-supported Pt catalyst systems containing defect adsorption sites on the anode of direct methanol ... neighboring to or distant from the Pt catalyst on H2 and CO adsorption properties, based on electronic
It should be noted that defect sites can cause CO poisoning, thereby deactivating the anode gradually ... It should be noted that defect sites can cause CO poisoning, thereby deactivating the anode gradually ... Carbon-supported Pt catalyst systems containing defect adsorption sites on the anode of direct methanol
At alkylation of benzene with 1-dodecene over Zeolite β, when the catalyst content in the system was ... exhibited higher distribution of heavy alkylate which formed through oligomerization reaction readily deactivated ... of D/C ratio.
Ac-cording to Summers and Hegedus, deactivation processes can take place uniformly on the catalyst surface ... Sulfur-poisoning and heat deterioration are the main causes of deactivation of the NSR catalyst.[1] Ⅱ ... easy, not expensive method for the simulation of catalyst deactivation in automobile.[2] Ⅳ.
start-up: The number of reactors required will reflect the policy of operation in terms of the level of catalyst ... model Simple reversible M-M type model Enzyme deactivation Incidence of diffusional restrictions Design ... transfer spherical particle eq. 4 eq. 5 η=f(ρ) eq. 6 η'=f(β0i) eq. 8 Model for reactor eq. 9 Enzyme deactivation