Torrefaction and gasification of biomass for polygeneration: Production of biochar and producer gas at low load conditions

Čespiva, Jakub; Niedźwiecki, Łukasz; Wnukowski, Mateusz; Krochmalny, Krystian; Mularski, Jakub; Ochodek, Tadeáš; Pawlak–Kruczek, Halina

doi:10.1016/j.egyr.2022.10.081

Cited by 16 publications

(7 citation statements)

References 39 publications

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“…The reactor worked in an autothermal regime, which required no additional energy input from an external source. A more detailed description of the performance of this technology on wood biomass was included in the study of Čespiva et al [37], on torrefied biomass in the study of Čespiva et al [38], and on solid recovered fuel in another work of Čespiva et al [39].…”

Section: Gasification-pilot-scale Rig and Gas Analysismentioning

confidence: 99%

Co-Gasification of Pistachio Shells with Wood Pellets in a Semi-Industrial Hybrid Cross/Updraft Reactor for Producer Gas and Biochar Production

Ryšavý,

Čespiva,

Kuboňová

et al. 2024

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The possibilities of pistachio shell biochar production on laboratory-scale gasification and pyrolysis devices have been described by several previous studies. Nevertheless, the broader results of the pistachio shell co-gasification process on pilot-scale units have not yet been properly investigated or reported, especially regarding the detailed description of the biochar acquired during the routine operation. The biochar was analysed using several analytical techniques, such as ultimate and proximate analysis (62%wt of C), acid–base properties analysis (pH 9.52), Fourier-transform infrared spectroscopy (the presence of –OH bonds and identification of cellulose, hemicellulose and lignin), Raman spectroscopy (no determination of Id/Ig ratio due to high fluorescence), and nitrogen physisorption (specific surface 50.895 m2·g−1). X-ray fluorescence analysis exhibited the composition of the main compounds in the biochar ash (32.5%wt of Cl and 40.02%wt of Na2O). From the energy generation point of view, the lower heating value of the producer gas achieved 6.53 MJ·m−3 during the co-gasification. The relatively high lower heating value of the producer gas was mainly due to the significant volume fractions of CO (6.5%vol.), CH4 (14.2%vol.), and H2 (4.8 %vol.), while hot gas efficiency accomplished 89.6%.

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Section: Gasification-pilot-scale Rig and Gas Analysismentioning

confidence: 99%

Co-Gasification of Pistachio Shells with Wood Pellets in a Semi-Industrial Hybrid Cross/Updraft Reactor for Producer Gas and Biochar Production

Ryšavý,

Čespiva,

Kuboňová

et al. 2024

Fire

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“…Four different case scenarios have been proposed by varying the amount of biomass processed in the gasification unit between 1000-20,000 ton/year (dry base). The efficiency for biomass conversion into medium-low calorific value syngas has been determined based on data found on bibliography [15,[18][19][20]. Biochar and gas yields are also crucial parameters to be considered for the analysis, as they will determine the quantity of solid and gaseous products obtained, thus affecting the cost-effectiveness of the proposed facility.…”

Section: Overall Efficiency Of the Gasification Processmentioning

confidence: 99%

“…Even though the gasification technology is usually focused on syngas production [11][12][13][14], it is also possible to maximize biochar over the production of syngas at lower temperatures or stoichiometric ratios. In this context, recent examples can be found on the co-production of syngas and biochar through gasification processes [11,[15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic Feasibility of Biomass Gasification for the Decarbonisation of Energy-Intensive Industries

Guerrero,

Sala,

Fresneda-Cruz

et al. 2023

Energies

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The current climatic and geopolitical situation leads to strong decarbonisation policies in several industries worldwide. Moreover, the European Union is pushing intensive industries to achieve a 55% reduction in CO2 emissions towards 2030. Among them, the steel manufacturing sector is at the lead of alternative projects that can help achieve this ambitious target. Co-production of syngas and biochar is one potential solution for this sector. Herein, a techno-economic analysis is provided to evaluate the economic feasibility and the effect of the most influential parameters for a successful deployment. A bibliographic review has been carried out to establish a clear baseline for such an analysis in terms of investment costs at several scales for gasification projects. Additionally, the cost evolution for coke, natural gas, and CO2 emission credits on the profitability of these projects are given. The case scenario processing 20,000 tbiomass/y is the most feasible solution, with a payback of around three years and a net present value (NPV) of around 15 million EUR, showing that biomass gasification can be an up-and-coming alternative in the mid-term.

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“…Syngas can also be used as a building block for chemical synthesis [16][17][18]. Furthermore, residues could be used as biochar [19,20] or further upgraded for use as sorbents [21][22][23]. The majority of countries, with the exception of those dominating in hydropower, are observing an increased trend in the use of bioenergy derived from biomass, which constitutes more than half of the energy supply [24].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Gasifying Agents in 3D Downdraft Gasification for Enhanced Gas Composition, Combustion, and CO2 Utilization

Mehmood,

Tahir,

Saeed

et al. 2023

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The depletion of fossil-based fuels, fluctuating fuel market, and environmental deterioration demand an aggressive approach towards the advancement of renewable energy technologies. By the time reliable technology for a clean and abundant energy supply is established, existing sources must be economized. Biomass gasification is the way forward in that direction. CFD modeling shows promise in the development of advanced gasification systems. A simplified 3D CFD model of a downdraft gasifier is developed to investigate the effect of gasifying agent composition on the quality of syngas. Simulation results are compared with published experimental data and found to be in reasonably good agreement. Mixing CO2 with a gasification agent is also investigated as a possible carbon capture and utilization (CCU) strategy. An air-steam mixture is used as a base-case gasification agent. Firstly, the effect of air-to-steam ratio on syngas composition is investigated. Secondly, the effect of oxygen and mixing CO2 with a gasification agent is investigated in two separate cases. A 50%-50% air-steam mixture is found to produce the best quality syngas. Oxygen is found to have a negligible impact on the quality of syngas. The air-steam-CO2 = 23%-50%-15% mixture is found to be optimum regarding syngas quality.

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Torrefaction and gasification of biomass for polygeneration: Production of biochar and producer gas at low load conditions

Cited by 16 publications

References 39 publications

Co-Gasification of Pistachio Shells with Wood Pellets in a Semi-Industrial Hybrid Cross/Updraft Reactor for Producer Gas and Biochar Production

Co-Gasification of Pistachio Shells with Wood Pellets in a Semi-Industrial Hybrid Cross/Updraft Reactor for Producer Gas and Biochar Production

Techno-Economic Feasibility of Biomass Gasification for the Decarbonisation of Energy-Intensive Industries

Optimization of Gasifying Agents in 3D Downdraft Gasification for Enhanced Gas Composition, Combustion, and CO2 Utilization

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