title: Catalytic gasification of biomass (Miscanthus) enhanced by CO2sorption.
abstract: The main objective of this work concerns the coupling of biomass gasification reaction and CO2sorption. The study shows the feasibility to promote biomass steam gasification in a dense fluidized bed reactor with CO2sorption to enhance tar removal and hydrogen production. It also proves the efficiency of CaO-Ca12Al14O33/olivine bi-functional materials to reduce heavy tar production. Experiments have been carried out in a fluidized bed gasifier using steam as the fluidizing medium to improve hydrogen production. Bed materials consisting of CaO-based oxide for CO2sorption (CaO-Ca12Al14O33) deposited on olivine for tar reduction were synthesized, their structural and textural properties were characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), and temperature-programmed reduction (TPR) methods, and the determination of their sorption capacity and stability analyzed by thermogravimetric analysis (TGA). It appears that this CaO-Ca12Al14O33/olivine sorbent/catalyst presents a good CO2sorption stability (for seven cycles of carbonation/decarbonation). Compared to olivine and Fe/olivine in a fixed bed reactor for steam reforming of toluene chosen as tar model compound, it shows a better hydrogen production rate and a lower CO2selectivity due to its sorption on the CaO phase. In the biomass steam gasification, the use of CaO-Ca12Al14O33/olivine as bed material at 700 °C leads to a higher H2production than olivine at 800 °C thanks to CO2sorption. Similar tar concentration and lighter tar production (analyzed by HPLC/UV) are observed. At 700 °C, sorbent addition allows to halve tar content and to eliminate the heaviest tars.
authors.affiliation: Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES) UMR CNRS 7515, ECPM, Université de Strasbourg, Strasbourg, France.
authors.forename: I
authors.initials: I
authors.lastname: Zamboni
authors.affiliation: Laboratoire d'Etudes et de Recherches sur le Matériau Bois (LERMAB) EA 4370, Université de Lorraine, Lorraine, France.
authors.forename: M
authors.initials: M
authors.lastname: Debal
authors.affiliation: Laboratoire de Chimie et Physique - Approche Multi-Echelles des Milieux Complexes (LCP-A2MC) EA 4632, Université de Lorraine, Lorraine, France.
authors.forename: M
authors.initials: M
authors.lastname: Matt
authors.affiliation: Laboratoire d'Etudes et de Recherches sur le Matériau Bois (LERMAB) EA 4370, Université de Lorraine, Lorraine, France.
authors.forename: P
authors.initials: P
authors.lastname: Girods
authors.affiliation: Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES) UMR CNRS 7515, ECPM, Université de Strasbourg, Strasbourg, France.
authors.forename: A
authors.initials: A
authors.lastname: Kiennemann
authors.affiliation: Laboratoire d'Etudes et de Recherches sur le Matériau Bois (LERMAB) EA 4370, Université de Lorraine, Lorraine, France.
authors.forename: Y
authors.initials: Y
authors.lastname: Rogaume
authors.affiliation: Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES) UMR CNRS 7515, ECPM, Université de Strasbourg, Strasbourg, France. claire.courson@unistra.fr.
authors.forename: C
authors.initials: C
authors.lastname: Courson
mesh_terms: D000327:Adsorption; D018533:Biomass; D017610:Calcium Compounds / Q000737:chemistry; D002245:Carbon Dioxide / Q000737:chemistry*; D002384:Catalysis; D005740:Gases / Q000737:chemistry; D058085:Iron Compounds; D017616:Magnesium Compounds; D010087:Oxides / Q000737:chemistry; D006109:Poaceae / Q000737:chemistry; D017640:Silicates; D013227:Steam; D013638:Tars / Q000737:chemistry; D014050:Toluene / Q000737:chemistry
chemical_list: D017610:Calcium Compounds; D005740:Gases; D058085:Iron Compounds; D017616:Magnesium Compounds; D010087:Oxides; D017640:Silicates; D013227:Steam; D013638:Tars; D002245:Carbon Dioxide; D014050:Toluene; C034475:olivine
keywords: Bi-functional materials; Biomass; CO2 sorption; Hydrogen production; Miscanthus × giganteus; Steam gasification