Experimental investigation of the SCR of NO<sub>x</sub> in a simulated moving bed reactor

Fissore, Davide; Tejedor, Diego Garran; Barresi, Antonello

doi:10.1002/aic.10916

Cited by 12 publications

(14 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reverse flow reactors for reduction of NO x by NH 3 are already decribed in Chapter 2. For the same reaction BARESSI and coworkers [82] investigated an alternative SMBCR process consisting of a sequence of three reactor/adsorbers with periodically Vol. 9 Chromatographic Reactorsvarying feed port.…”

Section: Applications Of Gas Chromatographic Reactorsmentioning

confidence: 99%

Chromatographic Reactors

Fricke¹,

Schmidt–Traub²,

Schembecker³

2008

Ullmann's Encyclopedia of Industrial Chemistry

View full text Add to dashboard Cite

Chromatographic reactors integrate chemical reaction and chromatographic separation in one apparatus. This offers potential for process intensification, especially in the case of equilibrium reactions. Different types of discontinuous and continuous processes as well as modeling of chromatographic reactors are described. Synthesis and design of this processes is very much influenced and often restricted by the type of reaction and the operating window which is set by the individual operating conditions for chemical reaction, mass separation, and equipment design. Integrated chromatographic reactors should be considered if chromatography is the favored separation process for a conventional sequential process design. Preparative chromatographic reactors are known for liquid‐ and gas‐phase processes. Laboratory‐scale applications are described. Analytical chromatographic reactors are used to determine reaction rate constants and kinetics, and to screen chromatographic systems and operating conditions for preparative applications. 1. Introduction 2. Types of Chromatographic Reactors 3. Modeling of Chromatographic Reactors 3.1. Adsorption Isotherm and Reaction Kinetics 3.2. Modeling the BCR 3.3. Modeling Simulated Moving Bed Chromatographic Reactors 3.4. Process control 4. Synthesis of Preparative Chromatographic Reactors 4.1. Process Principles 4.2. Type of Reaction 5. Design of Preparative Chromatographic Reactors 5.1. Design of the Process 5.2. Choice of Operating Conditions 6. Preparative Chromatographic Reactors 6.1. Applications of Gas Chromatographic Reactors 6.2. Application of Liquid Chromatographic Reactors 7. Analytical Chromatographic Reactors 7.1. Determination of Rate Constants 7.2. Enzymatic Reactions 7.3. Characterization of the Stationary Phase 7.4. Examination of Fast Equilibrium Reactions 7.5. Examination of Solvent Effects

show abstract

Section: Applications Of Gas Chromatographic Reactorsmentioning

confidence: 99%

Chromatographic Reactors

Fricke¹,

Schmidt–Traub²,

Schembecker³

2008

Ullmann's Encyclopedia of Industrial Chemistry

View full text Add to dashboard Cite

show abstract

“…[3][4][5] In addition, the traditional reagents such as ammonia and urea are not suitable for SNCR NO x removal from flue gas of lower temperatures and higher O 2 contents, which is occurring widely in practice, for example, the temperature of flue gas exhausted from iron ore sintering bed may not higher than 500 C while its O 2 level could be higher than 10 V/V%, 6 yet its NO x emission is strictly controlled 7 ; another example is the flue gas from incinerators, it often contains more extra O 2 but is of lower temperature than that from coal-fired boilers yet its NO x emission limits become similarly stricter. 8 To meet the emission limitations, 9 selective catalytic reduction De-NO x technology is widely used in a much lower temperature range (250-400 C), [10][11][12] but NO x reduction based on an SNCR process at lower temperatures is more desirable due to its much lower cost and more convenient operation. 13 Hydrazine hydrate (N 2 H 4 ÁH 2 O) is a type of strong reducing agent that is widely used as a rocket propellant, pesticide material, an oxygen scavenger in boiler water, and so forth.…”

Section: Introductionmentioning

confidence: 99%

Proposal and verification of a kinetic mechanism model for NO_x removal with hydrazine hydrate

2014

View full text Add to dashboard Cite

A relatively precise kinetic mechanism of NO x reduction using N 2 H 4 ÁH 2 O in a selective non-catalytic reduction process was proposed and verified by experiment in this study. The dominant radicals and reactions were confirmed, and the proper ranges of key parameters were determined through sensitivity analysis. Both experimental and simulation results show that the effective temperatures exhibit a bimodal distribution with the optimum temperatures being approximately 893 and 1248 K and the lower temperature window falling in the range of 848-973 K. The optimum residence time of the reaction was 0.2-0.35 s under the research conditions, and a longer residence time would lead to the regeneration of NO x . The normalized stoichiometric ratio (NSR) of 3.0 corresponded to the lowest temperature window, and a higher NSR value would make the temperature window shift to a higher temperature range. This kinetic mechanism model for the N 2 H 4 ÁH 2 O-based De-NO x process will serve its precise application. V C 2014 American Institute of Chemical Engineers AIChE J, 61: [904][905][906][907][908][909][910][911][912] 2015

show abstract

“…the coupling between chemical reaction and adsorptive separation, if the solid is an adsorbent which has a high adsorption capacity toward a reactant and a low one toward a product, so that the strongly adsorbed reactant is trapped inside the reactor. The SCR of NOx with NH3 can take large advantage from this mode of reactor operation in presence of a catalyst that adsorbs NH3 (Botar-Jid et al, 2005;Fissore et al 2006aFissore et al , 2006bFissore et al , 2006c.…”

Section: Introductionmentioning

confidence: 99%

Simulation of an industrial-scale process for the SCR of NOx based on the loop reactor concept

Marín¹,

Fissore²,

Barresi³

et al. 2009

Chemical Engineering and Processing: Process Intensification

Self Cite

View full text Add to dashboard Cite

This paper investigates the possibility of using an adiabatic loop reactor to carry out the Selective Catalytic Reduction of NOx with NH3. The advantages of this technology with respect to more traditional reactors operated in steady-state are discussed: when the temperature of the feed is low, a lower amount of heat is required to get full NOx conversion; moreover, the catalyst can be used to store a high amount of NH3 during the operation, thus preventing NH3 slip and/or NOx emissions when the feed composition changes. Both issues are investigated, using the design of an industrial-scale reactor as case study.

show abstract

Experimental investigation of the SCR of NO_x in a simulated moving bed reactor

Cited by 12 publications

References 20 publications

Chromatographic Reactors

Chromatographic Reactors

Proposal and verification of a kinetic mechanism model for NO_x removal with hydrazine hydrate

Simulation of an industrial-scale process for the SCR of NOx based on the loop reactor concept

Contact Info

Product

Resources

About

Experimental investigation of the SCR of NOx in a simulated moving bed reactor

Cited by 12 publications

References 20 publications

Chromatographic Reactors

Chromatographic Reactors

Proposal and verification of a kinetic mechanism model for NOx removal with hydrazine hydrate

Simulation of an industrial-scale process for the SCR of NOx based on the loop reactor concept

Contact Info

Product

Resources

About

Experimental investigation of the SCR of NO_x in a simulated moving bed reactor

Proposal and verification of a kinetic mechanism model for NO_x removal with hydrazine hydrate