Steps to understand the role played by the main operating conditions in the oxidative steam reforming of biomass fast pyrolysis volatiles

Garcia, Irati; Santamaria, Laura; Lopez, Gartzen; Bilbao, Javier; Olazar, Martin; Amutio, Maider; Artetxe, Maite

doi:10.1016/j.cej.2023.146223

Cited by 6 publications

(2 citation statements)

References 75 publications

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“…The process allowed the production of 10.5 wt% of H 2 (steam reforming at 600 • C, S/B ratio 4 and space time of 20g cat min gvolatiles −1 ) but the deactivation of the catalyst was significant, remaining still an open question that needs to be solved. A two-reactor system, composed of a conical SBR and an FBR, was used for the gasification of pinewood sawdust, using an Ni-based catalyst supported on Al 2 O 3 and doped with Ca [86]. Different tests demonstrated that the highest concentration of H 2 (8.30 wt%) was obtained at 600 • C for the steam reforming process with an S/B ratio of 3 and an ER of 0.12.…”

Section: ➢ Gasificationmentioning

confidence: 99%

Review of Experimental Activities and Recent Developments of Spouted Bed Reactors at Different Operational Scales

Carozzo,

Arato,

Moliner

2024

Energies

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Recent research advances and technological developments of spouted bed reactors (SBRs) have been discussed in this work. SBR has aroused increasing interest since their invention in 1955 due to its flexibility in processing different feedstocks and the high process yields that can be achieved due to its characteristic fluid dynamics. However, even though highly satisfactory results have been obtained at the laboratory scale for different applications (i.e., drying or thermochemical reactions, among others), their full implementation at an industrial level is still scarce, mainly due to the challenges encountered for their scale-up. In this work, an initial short description of SBR and configurations is followed by a review of the main experimental activities that have been conducted at different scales in the period 2013–2023. Advanced solutions such as multi-unit reactors and the use of rectangular geometries instead of the classical cylindrical ones have arisen as potential areas for further study and development to achieve a reliable implementation of the spouted bed technology at an industrial scale.

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Section: ➢ Gasificationmentioning

confidence: 99%

Review of Experimental Activities and Recent Developments of Spouted Bed Reactors at Different Operational Scales

Carozzo,

Arato,

Moliner

2024

Energies

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“…Its physicochemical properties are akin to those of fossil fuels like coal and petroleum, positioning it as an ideal alternative for H 2 production. − However, the current biomass H 2 production technology relies on the reforming process. , The exported H 2 is mixed with CO 2 , which requires downstream processes such as multistage steam conversion, VPSA decarbonization, PSA H 2 purification, etc. − (Figure ). This would lead to a low H 2 production efficiency and a high decarbonization energy consumption. , Therefore, it is important to innovate the biomass H 2 production method and improve the biomass H 2 decarbonization efficiency.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Production from Biomass-Based Chemical Looping: A Critical Review and Perspectives

Qiu,

Zeng,

Xiao

2024

Energy Fuels

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Biomass-based chemical looping (BCL) emerges as a highly prospective technique for generating high-purity H 2 , distinguished by its minimal energy penalties and potential for negative carbon emissions. However, its industrial implementation faces significant challenges owing to the intricate interactions in solid−gas reactions and the heat and mass management within the reactors. This work comprehensively reviews the current advancements in BCL H 2 production (BCLHP), emphasizing oxygen carrier selection, reactor design, system integration, and technoeconomic assessments. It highlights that BCLHP surpasses traditional biomass gasification methods in efficiency, resulting in reduced costs and net negative CO 2 emissions (−17.00 kg of CO 2 / kg of H 2 ). Fe-based oxides are deemed the most appropriate oxygen carriers; however, their utilization is constrained by high fabrication costs and the absence of scalable synthesis methods. Additionally, the uneven and intricate heat and mass transfer present substantial obstacles to scaling up the redox reactors. These issues collectively elevate construction costs and limit the application of BCLHP to laboratory or pilot scales. Significant technological challenges and research gaps in experimental and modeling studies undermine the reliability of simulation outcomes. Therefore, addressing these challenges necessitates developing suitable oxygen carriers and their scalable production methods, stable redox reactors, and overall system scalability. In conclusion, while BCLHP holds considerable promise for high-purity H 2 production and negative emissions, advancing it to practical applications will require innovative advancements in both the experimental and modeling domains.

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Biomass Source Influence on Hydrogen Production through Pyrolysis and in Line Oxidative Steam Reforming

Garcia,

Lopez,

Santamaria

et al. 2024

ChemSusChem

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This study evaluates the potential of several biomasses differing in nature and composition for their valorization by pyrolysis and in‐line oxidative steam reforming. The first task involved the fast pyrolysis of the biomasses in a conical spouted bed reactor at 500ºC, in which product yields were analyzed in detail. Then, the oxidative steam reforming of pyrolysis volatiles (gases and bio‐oil) was approached in a fluidized bed reactor. The reforming experiments were performed at 600 ºC, with an steam/biomass (S/B) ratio of 3 and catalyst (Ni/Al2O3) space times of 7.5 and 20 gcat min gvol‐1. Concerning equivalence ratio (ER), a value of 0.12 was selected to ensure autothermal operation. Remarkable differences were observed in H2 production depending on the type of biomass. Thus, pine wood led to a H2 production of 9.3 wt%. The lower productions obtained with rice husk (7.7 wt%) and orange peel (5.5 wt%) are associated with their higher ash and fixed carbon content, respectively, which limit the efficiency of biomass conversion to bio‐oil. However, in the case of the microalga, the poor performance observed is due to the lower conversion in the reforming step toward gases due to the composition of its pyrolysis volatile stream.

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Steps to understand the role played by the main operating conditions in the oxidative steam reforming of biomass fast pyrolysis volatiles

Cited by 6 publications

References 75 publications

Review of Experimental Activities and Recent Developments of Spouted Bed Reactors at Different Operational Scales

Review of Experimental Activities and Recent Developments of Spouted Bed Reactors at Different Operational Scales

Hydrogen Production from Biomass-Based Chemical Looping: A Critical Review and Perspectives

Biomass Source Influence on Hydrogen Production through Pyrolysis and in Line Oxidative Steam Reforming

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