The interaction between ammonia and NO under combustion conditions is analyzed in the present work, from both experimental kinetic modelling points of view. An systematic study influence main variables for NH3NO made using a laboratory tubular flow reactor installation. Experiments are performed at atmospheric pressure include: temperature 700–1500 K range, air stoichiometry, pyrolysis to very oxidizing conditions, NH3/NO ratio, 0.7–3.5 range. Nitrogen argon have been used as diluent gas. A...

Hydrogen-assisted oxidation of ammonia under flow reactor conditions was investigated through experiments and chemical kinetic modeling. Novel experiments, conducted in a tubular laminar as function the NH3/H2 ratio, stoichiometry, temperature (725–1475 K), were analyzed along with literature results from jet-stirred reactors. Ignition NH3 is strongly promoted by presence H2 all investigated. In general, behavior captured well model. With an increasing fraction fuel mixture, generation chain...

The interaction between NH3, CH4 and NO under different conditions of interest for combustion applications is analyzed, from both experimental kinetic modeling points view. Reduction by reburn SNCR (selective non-catalytic reduction) strategies evaluated, through an extense systematic study the influence main variables reduction, means laboratory flow-reactor experiments at atmospheric pressure. Variables analyzed include: temperature in 700 to 1500 K range, air stoichiometry fuel-rich (λ =...

This work is conducted within the framework of Power to Gas (PtG) technologies, focusing on topic "biogas upgrading". The objective enhance CH4 content biogas streams by utilizing CO2 present in these through Sabatier reaction, thereby producing a renewable alternative natural (fossil) gas. Referred as "SESaR"(Sorption Enhanced Reaction), this process employs catalytic fixed-bed reactor, featuring selective water adsorption using LTA 5 A zeolites, an innovative approach traditional...

Impact of using CO2 or N2/Ar as bath gas, representative respectively oxy-fuel air combustion scenarios, has been evaluated on the oxidation ammonia under a variety operating conditions in combined experimental and simulation study. Variables relevance temperature oxygen stoichiometry have considered at atmospheric pressure carefully controlled conditions. Additionally, impact presence NO, which can be formed from oxidation, also evaluated. The results obtained simulated with significant...

The present work addresses the oxidation of ammonia and ammonia-nitric oxide mixtures in a CO2 atmosphere, characteristic oxy-fuel processes and/or biogas combustion, from both experimental kinetic modelling points view. A parametric study NH3 NH3/NO is carried out, evaluating influence temperature (700–1500 K), stoichiometry (from pyrolysis, λ = 0, to significantly oxidizing conditions, 3.3), gas residence time (low values, 195/T(K) s high 3100/T(K) s) ratio (0.5–2.2), at atmospheric...

Methanation of the CO2 contained in a biogas stream has been experimentally analyzed fixed bed reactor with Ni-Mn catalyst, evaluating effect feeding reactants distributed throughout bed. The performance different configurations (conventional cofeeding and others implying lateral distribution one reactive streams) for nominal temperatures T (250 - 400 ºC) weight-related space velocities WHSV (47.71 6.63 gCO2 gcat-1 h-1), always keeping H2: ratio 4:1, CH4:CO2 7:3. For identical WHSV,...

This piece of work dealt with the concept ‘biogas upgrading’ or enrichment CH4 contained in a sweetened biogas to proportions and features comparable those synthetic natural gas (SNG). For this, behavior three lab made catalysts (Ni/Al2O3, Ru/Al2O3, Ni–Fe/Al2O3) was tested CO2 methanation reaction (Sabatier reaction) under different feeding conditions (with without methane). In first set experiments (without methane), good catalytic solids validated. All offered similar increasing...

In this work three Ni-Fe catalysts supported on zeolite 13X were tested for CO2 methanation at different temperatures. The study shows the influence of active species load synthesized catalysts. addition, effect ratio present was observed.

Este trabajo muestra los experimentos realizados con un catalizador de Ni-Fe para la reacción metanación CO2. El objetivo es mejorar selectividad hacia el producto deseado (CH4) en reactor múltiples entradas, determinando estrategia más adecuada alimentar reactivos llevar a cabo proceso.

A Fixed-Bed reactor improved by selective water adsorption LTA zeolites is proposed as an alternative to the conventional methanation reactors. This produces methane from renewable H2 (i.e. surplus electricity) and high CO2 concentration sources, could be municipal wastes derived biogas (30%v + 70%v CH4). As catalyst, a supported (g-Al2O3) Ni-Fe (7.5:2.5 wt/wt) was chosen.

This work studies the influence of introducing a CO2 adsorbent in bimetallic catalytic fixed bed reactor. The catalyst is lab-made Fe-Ni allow (2.5:7.5 wt/wt) supported on gamma alumina. Two adsorbents were tested this study, lab made CaO and Na2O (10

CH 4 production generated(mmol/g catalyst

En este trabajo se simula la reacción de metanación del CO2 un biogás, y comprueban los resultados –en forma selectividades hacia CO-, para distintas configuraciones alimentación a reactor lecho fijo con tres entradas laterales, determinándose las más adecuadas llevar cabo reacción.

This work is included within the framework of Power to Gas technologies concept (PtG) and deals with topic “biogasupgrading”, where CO2 contained in biogas streams used enrich its CH4 concentration through Sabatier reaction up a point which it can be comparable natural gas but renewable origin. The process has been called SESaR, standing for “Sorption Enhanced Reaction”. A catalytic fixed-bed reactor improved performance by selective water adsorption LTA 5A zeolites operated as an...

The present works addresses the oxidation of ammonia and ammonia-nitric oxide mixtures in a CO2 atmosphere, characteristic oxy-fuel or biogas combustion, from both experimental kinetic modelling points view. A parametric study NH3 NH3/NO is carried out, evaluating influence temperature (700-1500 K), stoichiometry (from pyrolysis, l=0, to significantly oxidizing conditions, l=3.3), gas residence time (low values, 195/T(K) s high 3100/T(K) s) ratio (0.5-2.2), at atmospheric pressure under...

A study of the affinity lab-made multifunctional catalysts to adsorb-desorb CO2, H2 and H2O has been carried out by thermogravimetry in Hydrogen Technologies Laboratory I3A. Higher CO2 affinities were showed catalyst comparison with nonfunctionalized FeNi catalyst.