Chemical-looping reforming

Exit stream 1 contains oxygen-depleted air, while exit stream 2 contains a concentrated mixture of carbon monoxide and hydrogen. 

A major difference between CLC and CLR processes is that reaction (37.2) is exothermic but reaction (37.4) is endothermic. In the practical execution of the process in a circulating fluidized bed, the heat released by reaction (37.1) is transferred through circulation to reactor 2 in order to assist the energetic requirements of the carrier reduction (or methane oxidation) reaction. 

Chemical Looping Water Splitting and Chemical Looping Carbon Dioxide Splitting 

Since the production of hydrogen is the main purpose of CLR, many researchers attempted to enhance the hydrogen production capacity by using steam as the oxidant entering reactor 1. In such a case, the reaction taking place in reactor 1 is the water sphtting reaction  

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Coal-Direct Chemical Looping Reforming Process... 

Recently, a new reactor has been proposed by combining the MR features with the chemical looping features for heat production with inherent CO2 capture. The novel reactor concept called Membrane Assisted Chemical Looping Reforming (MA-CLR) was introduced by Medrano et al. [55]. In this system (Figure 3.16), a FBMR is located in the fuel reactor of a CLR system, where the incorporation of membranes substitutes the WGS and PSA steps of the traditional CLR process. The selective extraction of hydrogen provides a pure H2 stream and also displaces the thermodynamic equilibria. Flence, reaction and... 

Medrano, J.A., Spallina, V, van Sint Annaland, M. and Gallucci, F. (2014) Thermodynamic analysis of a membrane-assisted chemical looping reforming reactor concept for combined H2 production and CO2 capture. International Journal of Hydrogen Energy, 39, 4725 738. 

Figure 3.8 Schematic drawing of membrane-assisted chemical looping reforming (Medrano et al 2013).

Moldenhauer P, Ryden M, Mattisson T, Lyngfelt A. Chemical-looping combustion and chemical-looping reforming of kerosene in a cbculating fluidized-bed 300 kW laboratory reactor, bit J Greenh Gas Control 2012 9 1. 

Ryden M, Lyngfelt A, Mattisson T. Synthesis gas generation by chemical-looping reforming in a continuously operating laboratory reactor. Fuel 2006 85 1631. 

ProU T, Bolhar-Nordenkampf J, Kolbitsch P, Hofbauer H. Syngas and a separate nitro-gen/argon stream via chemical looping reforming - A 140 kW pilot plant study. Fuel 2010 89 1249. 

Pimenidou P, Rickett G, Dupont V, Twigg MV. Chemical looping reforming of waste cooking oil in packed bed reactor. Bioresour Technol 2010 101 6389. 

Figure 33.11 Reforming efficiency profiles of combustion CLR = chemical looping reformer the systems studied as a function of the FBMR = fluidized bed membrane reactor MA-...

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