نتایج جستجو برای: selective catalytic reduction

تعداد نتایج: 745581  

Journal: :Fuel 2021

Biodiesel fuels releases higher NOx emissions than fossil diesel. The Selective Catalytic Reduction (SCR) technique used in the OEM industry is not suitable for application small engines due to back pressure and clogging problems. Non-Catalytic (SNCR) relatively large combustion operations. This study introduces a new design by combining SCR SNCR systems, use low power density diesel engines. s...

Journal: :Angewandte Chemie 2023

Enantioselective reduction reactions are privileged transformations for the construction of trisubstituted stereogenic centers. While these include established synthetic strategies, such as asymmetric hydrogenation, methods based on enantioselective addition hydridic reagents to electrophilic prochiral substrates have also gained importance. In this context, conjugate (ACR) α,β-unsaturated comp...

Journal: :Fuel 2021

A series of V2O5/HWO catalysts are prepared by hydrothermal and impregnation methods using different precursors, among which the V2O5/HWO-C catalyst exhibited optimal NH3-SCR performance. Compared to oxalic acid (O) water (W), commercial bacterial cellulose (C) as a precursor can firstly achieve more controllable synthesis form hexagonal WO3 (HWO) catalyst. Various characterization (XRD, N2-BET...

Anew, highly sensitive and selective catalytic kinetic method (CKM) for determination of osmium (VIII) has been established based on its catalytic effect on the oxidation of thionine dye by hydrogen peroxide in alkaline medium. The reaction has been followed spectrophotometrically by measuring the decrease in the absorbance band of thionine at 600 nm. Under the optimum conditions, the proposed ...

Journal: :Advanced Functional Materials 2021

In article number 2008505, Farid Akhtar and Zhejian Cao design a novel porous strontium chloride (SrCl2) scaffolded by graphene networks as ammonia carriers. The optimized SrCl2-reduced oxide (rGO) composite demonstrates extraordinary structural stability rapid kinetics for absorption desorption, offering robust structure selective catalytic reduction systems potential hydrogen storage applicat...

Journal: :Organic letters 2005
Daniel D Caspi Neil K Garg Brian M Stoltz

[reaction: see text] A highly selective catalytic reductive isomerization reaction is described. The extremely mild and neutral reaction conditions (10% Pd/C, H2, and MeOH at 0 degrees C) tolerate a wide range of functional groups and generally result in excellent yields. Mechanistic studies suggest that this reaction does not proceed via a stepwise reduction/elimination sequence or a pi-allylp...

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