Effect of CaO on tar production and dew point depression during gasification of fuel cane bagasse in a novel downdraft gasifier

Effect of CaO on tar reforming to hydrogen-enriched gas with in-process CO2 capture in a bubbling fluidized bed biomass steam gasifier

“…In addition, the increase in H 2 and total gas yields as products from this catalytic tar cracking reaction mentioned earlier in Section 3.3 can also support this explanation. Results similar to this study were also reported by Jordan and Akay [20]. Besides the light tars formed in Class 2 and 3, van Paasen and Kiel [21] found that cracking the heavier tar compounds in Class 1 could also lead to the occurrence of Class 5 tars.…”

“…Thus, addressing the relation between tar concentration and composition and gasification conditions in a systematic way is needed for efficient operation of commercial biomass gasification systems [19]. Although a limited number of works [20,40,41] studied the influence of CaO on tar amounts and compounds in biomass gasification, a detailed analysis of tar amount and presence of compounds is still lacking in open scientific literature, especially in the area of biomass steam gasification in a bubbling fluidized bed which is rarely found in literature.…”

“…Tar is defined as condensable organic compounds that are produced during gasification and become entrained in the syngas [19,20]. Utilization of a syngas contaminated with tar can cause extensive fouling and blocking of downstream pipelines and equipment as they condense at reduced temperature of the downstream gas.…”

Producing Hydrogen-rich Gas by Fresh Biomass Co-pyrolysis with Additive

“…CaO is abundant and cheap, its usage in gasification and pyrolysis attracted intensive researches recently for the sorption enhanced hydrogen production (SEHP) (Han et al, 2011). It was also reported that CaO had catalysis on tar reforming (Jordan and Akay, 2013). , T=700 °C, additive/biomass was 20wt.…”

Tar Removal From Biomass Gasification Streams: Processes and Catalysts

“…O benefício resultante é que as superfícies podem ser aquecidas em temperaturas baixas, evitando depósitos e incrustações. 64 Outro mineral que aparece com bastante frequência nos artigos é a olivina ((Mg,Fe) 2 SiO 4 ), que é um mineral de cor verde oliva, com dureza de 6,5 a 7,0. Tem menor atividade catalítica que a dolomita, necessitando de elevadas temperaturas reacionais (acima de 850 °C), mas tem elevada resistência mecânica, por isso é amplamente estudada como suporte.…”