Two manganese ores with different iron content were investigated as oxygen carriers for chemical looping conversion of simulated biomass volatiles. The aim was to study the performance regards combustion and potential use chemical-looping gasification wood-based biomass. studied in a 300 W reactor system circulation between fluidized air fuel reactors. temperature 850–900 °C flow rates 0.6–3 Lm...

Since solid oxide fuel cells (SOFC) produce electricity with high energy conversion efficiency, and chemical looping combustion (CLC) is a process for fuel conversion with inherent CO2 separation, a novel combined cycle integrating coal gasification, solid oxide fuel cell, and chemical looping combustion was configured and analyzed. A thermodynamic analysis based on energy and exergy was perfor...

A fluidized bed system combining two circulating fluidized bed reactors is proposed and investigated for chemical looping combustion using metal oxides as oxygen carriers. The global solids loop starts in one of the two reactors (primary reactor) where solids are entrained, separated from the gas in a cyclone and sent to the other reactor (secondary reactor) via a fluidized loop seal. From the ...

Chemical Looping Combustion process allows combustion of gaseous, liquid or solid fuels with CO2 capture. The oxygen necessary for can be supplied using lattice (CLC) uncoupling (CLOU) mechanisms. present work studies the effects kaolin addition on CuMn carrier behavior CLC and CLOU processes. was prepared by granulation a composition: 27.2 wt% CuO, 52.8 Mn3O4 20 kaolin. Oxygen release rates fl...

The reactivity of three Cu-, Fe-, and Ni-based oxygen carriers to be used in a chemical-looping combustion (CLC) system using syngas as fuel has been analyzed. The oxygen carriers exhibited high reactivity during reduction with fuel gases present in syngas (H2 and CO), with average values in the range 8-30 % min. No effect of the gas products (H2O, CO2) on the reduction reaction rate was detect...

Oxygen carriers play an important role in chemical looping processes to transport oxygen for fuel conversion. In this study, the defluidization phenomena of were examined under highly reducing conditions a fluidized-bed batch reactor. This is relevant chemical-looping gasification, where could be reduced significant extent compared that combustion. Only few studies have reported physical fluidi...

Chemical-Looping Combustion (CLC) has been suggested among the best alternatives to reduce the economic cost of CO2 capture using fuel gas because CO2 is inherently separated in the process. As gaseous fuels it can be used natural gas, refinery gas or syngas from coal gasification, which may 2 contain different amounts of sulfur compounds, such as H2S and COS. An experimental investigation of t...

In the current stage over 85% of world energy demand is supplied by fossil fuels. Coal-fired plants discharged roughly 40% of the total CO2 are the main contributors in CO2 emissions (Kim & Kim, 2004; Yang et al., 2008). Environmental issues caused by exhaust green house gases (GHG) and toxics have become global problems. Through the past studies of five decades, increased GHG levels in atmosph...