Effect of steam content in the air–steam flow on biomass entrained flow gasification

Hernández, Juan José Marín; Aranda, Gabriela N.; Barba, Javier García; Mendoza, Jorge M.

doi:10.1016/j.fuproc.2012.01.030

Cited by 127 publications

(55 citation statements)

References 32 publications

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“…In this way, a wide range of stoichiometric ratios (SR) [38], steam-to-biomass ratios (SBR) [29] and steam-air ratios (S/A) [16] (3) Depending on the fuel's characteristics the plant can treat up to nearly 10 kg/h, providing a maximum of 55 kWth. The plant consists of the following components: fuel feeding, gas inlet and pre-heating, gasification reactor, outlet gas cleaning system and control and monitorization systems that are shown in Figure 1.…”

Section: Gasification Equipmentmentioning

confidence: 99%

“…Gaseous emissions were measured and recorded by means of gas analyzers and suitable software, and the results were used to calculate the gas yield (η gas ) [16] by applying a balance to the inert gas (N 2 ) that came into the reactor as part of the air, the HHV of the syngas obtained [41], measured in kJ/Nm 3 , and the cold-gas efficiency [42]:…”

Section: Biomass Characterizationmentioning

confidence: 99%

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Optimization of a Bubbling Fluidized Bed Plant for Low-Temperature Gasification of Biomass

et al. 2017

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Investigation into clean energies has been focused on finding an alternative to fossil fuels in order to reduce global warming while at the same time satisfying the world's energy needs. Biomass gasification is seen as a promising thermochemical conversion technology as it allows useful gaseous products to be obtained from low-energy-density solid fuels. Air-steam mixtures are the most commonly used gasification agents. The gasification performances of several biomass samples and their mixtures were compared. One softwood (pine) and one hardwood (chestnut), their torrefied counterparts, and other Spanish-based biomass wastes such as almond shell, olive stone, grape and olive pomaces or cocoa shell were tested, and their behaviors at several different stoichiometric ratios (SR) and steam/air ratios (S/A) were compared. The optimum SR was found to be in the 0.2-0.3 range for S/A = 75/25. At these conditions a syngas stream with 35% of H 2 + CO and a gas yield of 2 L gas/g fuel were obtained, which represents a cold-gas efficiency of almost 50%. The torrefaction process does not significantly affect the quality of the product syngas. Some of the obtained chars were analyzed to assess their use as precursors for catalysts, combustion fuel or for agricultural purposes such as soil amendment.

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Section: Gasification Equipmentmentioning

confidence: 99%

Section: Biomass Characterizationmentioning

confidence: 99%

Optimization of a Bubbling Fluidized Bed Plant for Low-Temperature Gasification of Biomass

et al. 2017

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“…All the simulation and the experiment were conducted under lean conditions, and the result showed that syngas addition could help the engine by reducing pollution. Hernández et al [11,12] have tested the performance of the combination of syngas generation through the gasification of dealcoholized marc of grape from winery and syngas addition in a diesel engine. Different replacements of diesel by syngas with different engine loads were studied.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Performance and Emission of a Diesel‐Syngas Dual Fuel Engine

Feng

2017

Mathematical Problems in Engineering

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Based on the theory of direct relation graph (DRG) and the sensitivity analysis, a reduced mechanism for the diesel-syngas dual fuel was constructed. Three small thresholds were applied in the process of the detailed mechanism simplification by DRG, and a skeletal mechanism with 185 elements and the 832 elementary reactions was obtained. According to the framework of the skeletal mechanism, the time-consuming approach of sensitivity analysis was employed for further simplification, and the skeletal mechanism was further reduced to the size of 158 elements and 705 reactions. The Chemkin software with the detailed mechanism was utilized to calculate the effect of syngas addition on the combustion characteristics of diesel combustion. The findings showed that the addition of syngas could reduce the ignition delay time and increase the laminar flame speed. Based on the reduced mechanism and engine parameters, a 3D model of the engine was constructed with the Forte code. The 3D model was adopted to study the effect of syngas addition on the performance and exhaust emissions of the engine and the relevant data of the experiment was used in the calibration of the 3D model.

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“…Moreover, the process can also increase the hydrogen gas yield. 7,8 However, a review of relevant research found that the study of combinedenergy and activated carbon production using a pilot-scale downdraft steam co-gasification is not currently being conduct.…”

Section: Introductionmentioning

confidence: 99%

Effect of Steam on the Energy and Activated Carbon Production of a Pilot-scale Downdraft Steam Co-gasification

Prapakarn¹,

Arjharn²,

Liplap³

et al. 2017

Orient. J. Chem

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A by-product from gasification technology is charcoal that can be developed as high-quality activated carbon by activation technology such as steam, chemical, high nitrogen and other activation methods. Thus, in this study, the concept of combined energy and activated carbon production from coconut shell was investigated using a pilot-scale open top downdraft steam co-gasification with steam injected into the reduction zone of the gasififier. A pilot-scale experiment on coconut shell steam co-gasification aimed at generating electricity; therefore, the reactor temperature profile, syngas characteristics, performance of the syngas in the production of electricity were included in the steam co-gasification and iodine absorption of the charcoal. The result showed that the study of combined energy and activated carbon production from coconut shell is a way of using resources efficiently, increasing quality of the by-product, and using clean technology.

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Effect of steam content in the air–steam flow on biomass entrained flow gasification

Cited by 127 publications

References 32 publications

Optimization of a Bubbling Fluidized Bed Plant for Low-Temperature Gasification of Biomass

Optimization of a Bubbling Fluidized Bed Plant for Low-Temperature Gasification of Biomass

Numerical Study of the Performance and Emission of a Diesel‐Syngas Dual Fuel Engine

Effect of Steam on the Energy and Activated Carbon Production of a Pilot-scale Downdraft Steam Co-gasification

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