Effect of operating and design parameters on the gasification/combustion process of waste biomass in fixed bed downdraft reactors: An experimental study

Pérez, Juan F.; Melgar, Andrés; Benjumea, Pedro

doi:10.1016/j.fuel.2012.01.064

Cited by 138 publications

(56 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Kirsanovs et al (2017) show that use of feedstock with higher moisture content in a gasifier creates producer gas with a lower energy content. Higher feedstock moisture content decreases the achievable processing rate and maximum gasification temperature (Perez et al, 2012). Lowering the feedstock moisture content with a dryer minimizes the cost of electricity and increases the system-wide efficiency of a gasification CHP system (Brammer and Bridgwater, 2002).…”

Section: Effects Of Feedstock Quality On Small Scale Gasificationsupporting

confidence: 76%

Performance Analysis of a Biomass Gasifier Genset at Varying Operating Conditions

Palmer¹,

Severy²,

Chamberlin³

et al. 2018

Applied Engineering in Agriculture

View full text Add to dashboard Cite

ABSTRACT. An All Power Labs PP20 gasifier generation set (Berkeley, Calif.) any promising technologies are emerging for the conversion of residual forest waste to useful products. These processes are collectively known as biomass conversion technologies (BCTs) and include processes such as torrefaction, densification, and biochar production. However, the feasibility of BCT projects is highly dependent on the transportation economics of the unprocessed waste biomass (Pan et al., 2008). From a transportation economics standpoint, it is often optimal to place a BCT operation as close to the fuel source as possible. Examples include forest landing sites, at the roadside, or in locations close to forestry operations, such as former sawmills. Although optimal for transportation costs, technological and logistical challenges arise when operating a BCT in remote locations. A key logistical factor for BCT operation is obtaining a reliable source of electricity. Many potential sites do not have access to grid electricity, and a remote power source is therefore required to provide electricity to the BCT. BACKROUNDIn a previous study by Severy et al. (2016), various remote power generation technologies were compared for their potential feasibility for providing power at a remote forest landing site. The technologies evaluated in this study were an organic Rankine cycle (ORC) waste heat recovery device, a thermoelectric generator, a biomass gasifier with an engine generator (All Power Labs Power Pallet, Berkeley, Calif.), a solar PV array with battery storage, and a shaft work power generator. The generation sources were evaluated based on their mobility, footprint, reliability, operational intensity, electrical load following ability, environmental impact, capital cost, operational cost safety, and ease of permitting. The results of the technoeconomic feasibility study concluded that a biomass gasifier was the preferred alternative technology to replace a diesel generator at a BCT site due to its mobility, small footprint, competitive lifecycle cost, and quoted load following abilities (Severy et al., 2016). To validate the results of the feasibility study and extend research on the topic, the goal of this study is to evaluate the suitability of the APL PP20 for powering biomass conversion technologies in the greater Pacific Northwest area. The objectives are to measure the power output and load following capabilities, quantify the emission rates, and provide electricity to a remote BCT that has a fluctuating load. By conducting these tests, the authors can verify whether this gasifier generator is a technically-viable alternative to a diesel generator at offgrid locations. GASIFIER AS AN ELECTRICAL POWER SOURCEGasification technology has been used for decades (Ghosh et al., 2006). However, due to relatively recent technology improvements, there has been an increase in development and interest in the technology. Ahrenfeldt et al. (2013) review the state of the art of biomass gasification combined heat and power (CHP) syst...

show abstract

Section: Effects Of Feedstock Quality On Small Scale Gasificationsupporting

confidence: 76%

Performance Analysis of a Biomass Gasifier Genset at Varying Operating Conditions

Palmer¹,

Severy²,

Chamberlin³

et al. 2018

Applied Engineering in Agriculture

View full text Add to dashboard Cite

show abstract

“…In the specific case of the best alternative, wp1, the low water and ash content, together with and a small particle size and the characteristics of pellet fuels (high LHV and adiabatic temperature) caused the high GRG values that are consistent with those found in the literature [5,25,36]. This fact indicates that there is an inverse correlation between ash content and heating value, because the ash does not contribute significantly to the overall heat released [37,38].…”

Section: Resultsmentioning

confidence: 99%

The influence of parameters variability on biomass selection for energy use

Arce¹

2015

Energ Sustain Soc

View full text Add to dashboard Cite

show abstract

“…The particle size selected to be torrefied was between 10 mm and 20 mm because some thermochemical processing technologies (e.g. fixed bed gasification or combustion) operate with this size range (Pérez et al 2012).…”

Section: Experimental Materialsmentioning

confidence: 99%

Physicochemical Characterization of Torrefied Wood Biomass under Air as Oxidizing Atmosphere

Ramos-Carmona¹,

Delgado-Balcázar²,

Pérez³

2017

BioResources

View full text Add to dashboard Cite

The effects of torrefaction under an oxidizing atmosphere on the physicochemical properties of patula pine wood chips were studied. Raw and torrefied pine were characterized to evaluate the effect of temperature and residence time on biofuel properties, such as bulk density, equivalent Hardgrove grindability index (HGIeq), ultimate and proximate analyses, heating value, and fuel value index (FVI). In contrast, the torrefaction process was characterized by mass and energy yields, and by the energymass co-benefit index (EMCI). Torrefaction was performed in a rotary kiln at temperatures between 180 °C and 240 °C during residence times between 30 min and 120 min. The torrefaction process under an oxidizing atmosphere tended to increase the fixed carbon/volatile matter ratio (from 0.19 to 2.5), while the H/C and O/C atomic ratios decreased 73% and 55%, respectively. The best properties of wood reached in the experimental plan were obtained at 210 °C during 75 min. For this torrefaction condition, energy yield, FVI, and EMCI were 85.91%, 1.91 MJ/cm 3 , and 4.41%, respectively. Additionally, the lower heating value for torrefied pine (18.65 MJ/kg) was higher than for the raw material (17.76 MJ/kg), and the HGIeq was 17% greater, which resulted in a better grindability behavior.

show abstract

Effect of operating and design parameters on the gasification/combustion process of waste biomass in fixed bed downdraft reactors: An experimental study

Cited by 138 publications

References 28 publications

Performance Analysis of a Biomass Gasifier Genset at Varying Operating Conditions

Performance Analysis of a Biomass Gasifier Genset at Varying Operating Conditions

The influence of parameters variability on biomass selection for energy use

Physicochemical Characterization of Torrefied Wood Biomass under Air as Oxidizing Atmosphere

Contact Info

Product

Resources

About