Preparing Ag/Al2O3 catalyst with AIN addition to improve the low | 33717
Organic Chemistry: Current Research

Organic Chemistry: Current Research
Open Access

ISSN: 2161-0401

+44 1478 350008

Preparing Ag/Al2O3 catalyst with AIN addition to improve the low temperature reduction activity of NOx by ethanol

3rd International Conference on Past and Present Research Systems of Green Chemistry

September 19-21, 2016 Las Vegas, USA

Hua Deng, Yunbo Yu and Hong He

Chinese Academy of Sciences, China

Posters & Accepted Abstracts: Organic Chem Curr Res

Abstract :

NOx removal from lean-burn exhaust remains a major challenge in environmental catalysis. Selective catalytic reduction of NOx by hydrocarbons (HC-SCR) is a potential method to remove NOx from lean-burn exhausts. The alumina supported silver catalyst (Ag/Al2O3) is deemed as one of the most effective materials for HC-SCR of NOx in excess oxygen. In particular, ethanol is extremely effective for the SCR of NOx over Ag/Al2O3. However, it is lack of activity in the low temperature range (<350 oC) still remains a problem. Since pioneer work of Burch et al, preparing a new type of Ag/Al2O3 catalyst to improve its low temperature performance by solvent-free mechanochemical method drew wide interest. In former study, the detailed preparing conditions including rotation speed and ball-milled time were carefully examined. The performance of selective reduction of NOx was evaluated by ethanol accompanied with byproduct monitor. A strong positive correlation between the amount of Altetra structures and N2 production rate confirms the crucial role of Altetra in NOx reduction by ethanol. Thus, oriented designing and creating active site of HC-SCR (namely Ag-O-Altetra entity) at micro-scale in Ag/Al2O3 is promising to improve the conversion activity at low temperatures. In this study, AlN was used as precursor of Altetra entities to anchor isolated silver ions. After water thermal calcination of Ag/Al2O3 with AlN addition, the low temperature activity was truly improved. The catalytic performance of this catalyst was close to the H2 effect.

Biography :

Hua Deng has completed his PhD in Environmental Science from Research Center for Eco-Environmental Sciences (RCEES), Chinese Academy of Sciences (CAS) in 2015. He has been working as an Assistant Professor in Institute of Urban Environment (IUE), Chinese Academy of Sciences (CAS). His research interests include environmental catalysis and air pollution control such as selective catalytic reduction of NOx and catalytic combustion of Volatile Organic Compounds (VOCs).