Effect of design and operating parameters on the gasification process of biomass in a downdraft fixed bed: An experimental study

Guo, Feiqiang; Dong, Yong; Dong, Li; Guo, Chuangxin

doi:10.1016/j.ijhydene.2014.01.130

Cited by 169 publications

(56 citation statements)

References 24 publications

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“…Therefore, in the previous experiment, the combustible gas production process (indicated by the burner operation) only lasted for 10-15 minutes after the ignition process. As a result, in this experiment, secondary air intake was added into the reactor to uniform the partial oxidation zone so that the pyrolysis zone could be optimized (Guo et al, 2014). This air intake was circular in shape, and its number of holes were adjusted with those of primary air intakes, i.e., six.…”

Section: Results Of Air Intake Modification Using Circular Air Intakementioning

confidence: 99%

“…The purpose was to analyze the effects of each ER on the temperature distributions inside the reactor and burner and the producer gas quality. In order to facilitate the analysis, an experiment conducted by Guo et al (2014) was set as a reference. One of this experiment's results was a graph which shows the effects of ER on producer gas composition and LHV (Figure 4).…”

Section: Analysis Of Equivalence Ratio (Er) Effect On Pyrolysis Zone mentioning

confidence: 99%

“…The drying, pyrolysis, oxidation and gasification zone temperatures are greatly affected by this AFR value. A high temperature in the oxidation zone can increase the reduction reaction and tar breakdown rates so that heating value increases and tar content decreases (Guo et al, 2014). Finally, creating modifications in the air intake flow rate can affect the temperature distribution and equivalence ratio (ER) inside a gasifier (Gai & Dong, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Air Intake Modification for Pyrolysis Optimization on Rice Husk Fixed Bed Downdraft Gasifier with Maximum Capacity of 30 Kg/hour

Dafiqurrohman

Surjosatyo²,

Gibran

2016

IJTech

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Rice husk is one of the most abundant biomass wastes in Indonesia. One way to convert it into an alternative source of energy is biomass gasification. This is a thermochemical process which converts biomass feedstock into fuel gas or chemical feedstock gas (producer gas). The gasification type which is developed in this study is fixed bed downdraft type due to its low tar content and compatibility in microscale implementation. One major problem with the implemented biomass gasification reactor was ruggedness of the partial oxidation process due to the absence of air in the reactor's middle section, which consequently affected the pyrolysis zone. Several experiments were conducted previously using coconut shells and rice husks as solid feedstock, where an equivalence ratio (ER) of 0.4 was obtained. Therefore, in order to optimize the pyrolysis zone, the modification conducted involves adding a circular air intake into the gasifier. Experiments were conducted in a pyrolysis temperature range of 300-700 o C with ER variation of 0.19, 0.24, 0.27 and 0.31. The results show that a good quality producer gas is produced at an ER value of 0.24. This value shows a promising result because the ER value of biomass gasification standard is 0.25.

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Section: Results Of Air Intake Modification Using Circular Air Intakementioning

confidence: 99%

Section: Analysis Of Equivalence Ratio (Er) Effect On Pyrolysis Zone mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Air Intake Modification for Pyrolysis Optimization on Rice Husk Fixed Bed Downdraft Gasifier with Maximum Capacity of 30 Kg/hour

Dafiqurrohman

Surjosatyo²,

Gibran

2016

IJTech

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“…The feed size of torrefied sugarcane bagasse was also among the factors that contributed to the efficiency. Previous studies by other researchers once established a correlation between gasification efficiency, gasifier geometry such as throat angle and feedstock characteristics such as feed size [27]. Improved biomass properties will enhance its gasification efficiency when systems with constricted throat angles are used [6,16,36,37].…”

Section: Influence Of Throat Angle On Gasification Efficiencymentioning

confidence: 99%

“…3, optimum gasification efficiency was achieved with the highest feed input of 100 kg/h, which was attributed to increased temperatures within the gasifier during gasification simulation. A high value of biomass feed input will speed up the rate of reactions within the gasifier, especially with regard to the strong oxidation reactions, leading to increased gasification efficiency as a consequence of rise in temperature created by the oxidation reactions [27]. The increased temperature and rate of reactions created a situation with improved carbon monoxide and hydrogen production that led to complete conversion of torrefied sugarcane bagasse, at the same time decreasing char yield.…”

Section: Influence Of Feed Input On Gasification Efficiencymentioning

confidence: 99%

Assessment of the Influence of Torrefied Biomass Physical Characteristics, Design and Operating Variables on Gasification Efficiency

Anukam¹,

Mamphweli²,

Reddy³

et al. 2016

JCCE

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Gasification efficiency is an important factor that determines the actual technical operation as well as the economic viability of using a gasifier system for energy production. In this study, the impact of the physical properties of torrefied bagasse and the influence of gasifier design and operating variables were investigated in a computer simulated downdraft gasification system. Results obtained from the study indicated an interrelationship between feedstock characteristics, especially with regard to feed size, design variables such as throat angle and throat diameter as well as gasifier operating conditions such as temperature of input air and feed input. These variables influenced the efficiency of the gasification process of sugarcane bagasse because of increased enhancement of combustion zone reactions, which liberated huge amount of heat that led to a rise in the temperature of the gasification process. This condition also created increased tar cracking within the gasification system, contributing to reduction in the overall yield of tar.

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Techno‐economic assessment on the implementation of biomass gasifier in conventional parboiling rice mills

Wincy

Edwin

2019

Int J Energy Res

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Summary Enhancement of efficiency in rice processing mills can help rural farmers to reduce the cost of rice production. Parboiling‐the hydrothermal treatment of paddy rice, accounts for a significant portion of total rice processing costs and its quality. A rice husk powered gasifier‐based parboiling system is an attractive option for rural rice processing mills but has not been widely adopted due to various constraints. Hence, there is a need for technical and economical analysis on gasifier‐based rice parboiling system to generate information on efficiency improvement and the cost‐effective ways in rice processing industries. This paper presents a techno‐economic evaluation of rice husk powered gasifier‐based rice processing systems working in either Producer Gas in Hot Gas Mode (PG‐HGM) or Producer Gas in Cold Gas Mode (PG‐CGM). MATLAB software has been used for mathematical analysis. The research reveals that the biomass gasifier operated rice parboiling system working in both modes can have the overall system efficiency as 49% to 57% with a lowest payback time of 4‐2 years. Positive Net Present Cost is observed for the capacities above 1.5 tons/batch in PG‐HGM.

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Effect of design and operating parameters on the gasification process of biomass in a downdraft fixed bed: An experimental study

Cited by 169 publications

References 24 publications

Air Intake Modification for Pyrolysis Optimization on Rice Husk Fixed Bed Downdraft Gasifier with Maximum Capacity of 30 Kg/hour

Air Intake Modification for Pyrolysis Optimization on Rice Husk Fixed Bed Downdraft Gasifier with Maximum Capacity of 30 Kg/hour

Assessment of the Influence of Torrefied Biomass Physical Characteristics, Design and Operating Variables on Gasification Efficiency

Techno‐economic assessment on the implementation of biomass gasifier in conventional parboiling rice mills

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