Steam/oxygen biomass gasification at pilot scale in an internally circulating bubbling fluidized bed reactor

Abstract An innovative 1000 kW th pilot plant based on a bubbling fluidized bed gasifier with internal recirculation was operated in experimental campaigns of biomass gasification. The evaluations were focused on the gasifier performances and quality of the product gas. To this aim, tests were carried out at atmospheric pressure using almond shells as a feedstock and three defined gasification mediums (i.e. steam/O 2 mixture, 35wt.% and 50wt.% O 2 enriched air); process temperature was in the range 820–880 °C. The result assessment allowed to evaluate the system flexibility to the gasifying agent and acquire data on the gas producible with this specific configuration. Based on the dry compositions, LHVs in the range 5.9–6.7 MJ/Nm 3 dry , 6.3–8.4 MJ/Nm 3 dry and 10.9–11.7 MJ/Nm 3 dry were respectively calculated for the three product gases. Correspondingly, an increase in the cold gas efficiency from 0.5 up to 0.7 was also estimated. Concerning the contaminant loads, in the case of the tests related to steam/O 2 biomass gasification, particle and tar contents were found in the range 6–10 g/Nm 3 dry and 12–18 g/Nm 3 dry , respectively, while H 2 S, HCl and NH 3 were at concentrations below 100 ppms (v).

[1]  A. K. Dalai,et al.  Production of hydrogen and/or syngas (H2 + CO) via steam gasification of biomass-derived chars , 2003 .

[2]  A. Bridgwater,et al.  Overview of Applications of Biomass Fast Pyrolysis Oil , 2004 .

[3]  A. Bridgwater.  Review of fast pyrolysis of biomass and product upgrading , 2012 .

[4]  Peter McKendry,et al.  Energy production from biomass (Part 2): Conversion technologies. , 2002, Bioresource technology.

[5]  Xiangmei Meng,et al.  Biomass gasification in a 100 kWth steam-oxygen blown circulating fluidized bed gasifier: Effects of operational conditions on product gas distribution and tar formation , 2011 .

[6]  Pedro Ollero,et al.  Air–steam gasification of biomass in a fluidised bed: Process optimisation by enriched air , 2009 .

[7]  Emanuele Graciosa Pereira,et al.  Sustainable energy: A review of gasification technologies , 2012 .

[8]  S. Rapagnà.  Steam-gasification of biomass in a fluidised-bed of olivine particles. , 2000 .

[9]  Douglas C. Elliott,et al.  Relation of Reaction Time and Temperature to Chemical Composition of Pyrolysis Oils , 1988 .

[10]  Hermann Hofbauer,et al.  Steam gasification of various feedstocks at a dual fluidised bed gasifier: Impacts of operation conditions and bed materials , 2011 .

[11]  Robert C. Brown,et al.  Steam/oxygen gasification system for the production of clean syngas from switchgrass , 2015 .

[12]  Priyanka Kaushal,et al.  Steam assisted biomass gasification—an overview , 2012 .

[13]  J. G. Wijmans,et al.  Membrane-based oxygen-enriched combustion , 2013 .

[14]  Shaoping Xu,et al.  Biomass gasification in an external circulating countercurrent moving bed gasifier , 2013 .

[15]  Hermann Hofbauer,et al.  Stoichiometric Water Consumption of Steam Gasification by the FICFB‐Gasification Process , 2008 .

[16]  Changhou Liu,et al.  Steam gasification of biomass for hydrogen-rich gas in a free-fall reactor , 2007 .

[17]  Peter McKendry,et al.  Energy production from biomass (Part 1): Overview of biomass. , 2002, Bioresource technology.

[18]  Jesper Ahrenfeldt,et al.  Biomass gasification cogeneration – A review of state of the art technology and near future perspectives , 2013 .

[19]  Maria Laura Mastellone,et al.  The O₂-enriched air gasification of coal, plastics and wood in a fluidized bed reactor. , 2012, Waste management.

[20]  Yaji Huang,et al.  Enriched‐Air Gasification of Refuse‐Derived Fuel in a Fluidized Bed: Effect of Gasifying Conditions and Bed Materials , 2014 .

[21]  Hayato Hagi,et al.  Energy Efficiency of Oxygen Enriched Air Production Technologies: Cryogeny vs Membranes , 2014 .

[22]  M. O. Garg,et al.  Syngas production through gasification and cleanup for downstream applications Recent developments , 2011 .

[23]  Sharifah Rafidah Wan Alwi,et al.  A review on utilisation of biomass from rice industry as a source of renewable energy , 2012 .

[24]  K. Sumathy,et al.  AN OVERVIEW OF HYDROGEN PRODUCTION FROM BIOMASS , 2006 .

[25]  D. Kunii,et al.  Flow of dense fluidized particles through an opening in a circulation system , 1986 .

[26]  M. Aznar,et al.  Biomass gasification in atmospheric and bubbling fluidized bed: effect of the type of gasifying agent on the product distribution , 1999 .

[27]  Daizo Kunii,et al.  Development of a new system for circulating fluidized particles within a single vessel , 1985 .

[28]  A. C. Hoffmann,et al.  The dynamics of large particles in a four-compartment interconnected fluidized bed , 1999 .

[29]  Subhash Bhatia,et al.  Oxygen separation from air using ceramic-based membrane technology for sustainable fuel production and power generation , 2011 .

[30]  C Freda,et al.  Biomass gasification and in-bed contaminants removal: performance of iron enriched olivine and bauxite in a process of steam/O2 gasification. , 2012, Bioresource technology.

[31]  H. M. Junginger,et al.  Production and trading of biomass for energy – an overview of the global status , 2007 .

[32]  H. Hofbauer,et al.  Tar content and composition in producer gas of fluidized bed gasification of wood—Influence of temperature and pressure , 2009 .

[33]  Lee R. Lynd,et al.  Overview and evaluation of fuel ethanol from cellulosic biomass , 1996 .

[34]  Isabel Cabrita,et al.  The study of reactions influencing the biomass steam gasification process , 2003 .

[35]  J. Fjellerup,et al.  Formation, Decomposition and Cracking of Biomass Tars in Gasification , 2005 .

[36]  Murray Moo-Young,et al.  Towards sustainable production of clean energy carriers from biomass resources , 2012 .

[37]  R. Saxena,et al.  Thermo-chemical routes for hydrogen rich gas from biomass: A review , 2008 .

[38]  J. Corella,et al.  Biomass gasification with pure steam in fluidised bed: 12 variables that affect the effectiveness of the biomass gasifier , 2008 .

[39]  D. Klass.  Biomass for Renewable Energy, Fuels, and Chemicals , 1998 .

[40]  Xiu-li Yin,et al.  Study on biomass circulation and gasification performance in a clapboard-type internal circulating fluidized bed gasifier. , 2009, Biotechnology advances.

[41]  Umberto Arena,et al.  Fluidized bed gasification , 2013 .

[42]  T. Takarada,et al.  Multi-stage biomass gasification in Internally Circulating Fluidized-bed Gasifier (ICFG): Test operation of animal-waste-derived biomass and parametric investigation at low temperature , 2010 .

[43]  G. Braccio,et al.  NUMERICAL SIMULATION OF GAS-SOLID FLOW IN AN INTERCONNECTED FLUIDIZED BED , 2015 .

[44]  M. Aznar,et al.  Biomass Gasification in Fluidized Bed at Pilot Scale with Steam−Oxygen Mixtures. Product Distribution for Very Different Operating Conditions , 1997 .

[45]  Pier Ugo Foscolo,et al.  Design and cold model testing of a biomass gasifier consisting of two interconnected fluidized beds , 2007 .

[46]  Tasneem Abbasi,et al.  Biomass energy and the environmental impacts associated with its production and utilization , 2010 .

[47]  Linghong Zhang,et al.  Overview of recent advances in thermo-chemical conversion of biomass. , 2010 .

[48]  Fluid Dynamic Investigation of an Internal Circulating Fluidized Bed Gasifier by Cold Model , 2012 .

[49]  Julian R.H. Ross,et al.  Catalysis for conversion of biomass to fuels via pyrolysis and gasification: A review , 2011 .

[50]  A. Smith,et al.  A review of air separation technologies and their integration with energy conversion processes , 2001 .

[51]  Jc Jaap Schouten,et al.  A single radiotracer particle method for the determination of solids circulation rate in interconnected fluidized beds , 1997 .