Biomass steam gasification for hydrogen-rich gas production in a decoupled dual loop gasification system

Xiao, Yahui; Xu, Shuai; Song, Yangbo; Shan, Yiyuan; Wang, Chao; Wang, Guangyong

doi:10.1016/j.fuproc.2017.05.013

Cited by 53 publications

(20 citation statements)

References 40 publications

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“…The syngas was sampled using a gas storage pipe taken from the gasifier exit and tested using a gas chromatography measurement unit. The tests were repeated for three (3) different temperature variations of the gasification reactor of 600 o C (I), 650 o C (II) and 700 o C (III).…”

Section: Methodsmentioning

confidence: 99%

“…The technology of converting biomass into energy can be done by gasification which is considered to be one of the most matured techniques to convert biomass into flammable syngas due to its high conversion efficiency and wide application of the gas [2]. The gasification intrinsically involves a series of reactions including fuel pyrolysis, char gasification, carbon residues combustion and tar cracking/reforming [3]. In dual fluidized bed reactors, gasification and combustion processes are well separated from each other and the heat required by endothermic gasification is obtained from the combustion process through circulation of heated bed materials such as quartz sand.…”

Section: Introductionmentioning

confidence: 99%

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An increase in bed temperature on gasification of dual reactor fluidized bed

et al. 2018

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One of the main issues using biomass as fuel in air gasification is the dilution of its product gas by the nitrogen in the air. A dual reactor fluidized bed (DRFB) overcomes this problem in which the gasification and combustion reactions are decoupled and conducted in two separate fluidized bed reactors connected by circulating bed material. The DFRB unit made of 304 stainless steel pipe with a height of 100 and 150 cm, and inner diameters (i.d.) of 15.2 and 5.1 cm for gasifier and combustor respectively. The rice husk as fuel and quartz sand as bed material having the same size of 0.4 - 0.6 mm were applied in this investigation. Since the gasification process is an endothermic reaction, gasification temperatures are varied at 600°C to 700°C while combustion reactor were kept at 600°C using the electric heaters enclosed in ceramic cover. The superficial gas velocity in this study was kept constant at 17 m/s using the external air volumetric flux of the blower flow entering the DRFB loop. Gas gasification samples are then examined by gas chromatography to determine syngas content (CO, CH4 and H2). The test results showed that by the increasing temperature of the gasification reactor there was an increase in syngas especially CO gas conentration. The temperature increases in the gasification reactor (600°C, 650°C, 700°C) is able to increase the endothermic reaction in the gasification process which is dominated by CO gas production. The syngas efficiency was found to increase from 40.95% to 43.77%.as the temperature of the gasification reactor increased.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An increase in bed temperature on gasification of dual reactor fluidized bed

et al. 2018

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“…The gasification reaction was slow, but kept increasing in the second phase [52]. Xiao et al [55] found the pyrolysis/gasification of pine sawdust was largely improved by increasing the reactor temperature from 700 to 850 °C. Prasertcharoensuk et al [57] found that pyrolysis temperature significantly influenced char properties, specifically, the surface area and pore size increased with an increase in temperature from 600 to 900 °C.…”

Section: Operating Factors and Performancementioning

confidence: 99%

Solid Waste Gasification: Comparison of Single- and Multi-Staged Reactors

Zhao¹,

Li²,

Lamm³

et al. 2021

Gasification [Working Title]

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Interest in converting waste into renewable energy has increased recently due to concerns about sustainability and climate change. This solid waste is mainly derived from municipal solid waste (MSW), biomass residue, plastic waste, and their mixtures. Gasification is one commonly applied technology that can convert solid waste into usable gases, including H2, CO, CH4, and CO2. Single- and multi-staged reactors have been utilized for solid waste gasification. Comparison in reactor dimensions, operating factors (e.g., gasification agent, temperature, and feed composition), performance (e.g., syngas yield and selectivity), advantages, and disadvantages are discussed and summarized. Additionally, discussion will include economic and advanced catalysts which have been developed for use in solid waste gasification. The multi-staged reactor can not only be applied for gasification, but also for pyrolysis and torrefaction.

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“…Therefore, the gasification process has become one of the most attractive technologies for converting biomass into valuable fuels in the current energy scenario. The process converts biomass into a combustible gaseous mixture, which consists mainly of H2 and CO (referred to as syngas), but also contains CH4 and CO2 and minor amounts of other components [2].…”

Section: Introductionmentioning

confidence: 99%

Assessing the influence of biomass properties on the gasification process using multivariate data analysis

Gil

González-Vázquez

García

et al. 2019

Energy Conversion and Management

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Multivariate analysis was used to study the influence of the biomass characteristics on the gasification process. Ten lignocellulosic biomass samples (almond shells-AS-, chestnut sawdust-CHE-, torrefied chestnut sawdust-CHET-, cocoa shells-CS-, grape pomace-GP-, olive stones-OS-, pine cone leafs-PCL-, pine sawdust-PIN-, torrefied pine sawdust-PINT-, and pine kernel shells-PKS-) were gasified in a bubbling fluidized bed gasifier under an air-steam atmosphere. Statistical analysis was applied to the variables that described the results of the gasification process, i.e., gas concentration, gas production (moles), calorific value of the product gas, energy density, and cold gas efficiency, together with the main biomass properties, such as those derived from the elemental and proximate analyses, the higher heating value (HHV), the particle density, and the elemental composition of the ashes. Hierarchical cluster analysis (HCA) and principal component analysis (PCA) were applied to the data of biomass properties and gasification parameters in order to elucidate which feedstock features had a more determinant influence on the gasification process. Both HCA and PCA revealed a clear separation of the biomass samples into two main groups on the basis of the gasification results. The results indicated that PKS, PCL, PINT, OS and PIN biomasses were characterized by high production of combustible gases, such as CO and CH4, high conversion and cold gas efficiency during gasification. This indicated that the most important biomass properties for promoting the gas production, calorific value of the product gas, gasification conversion and energy efficiency were the C and H contents and the HHV of the biomass. However, biomasses CS and GP were mainly characterized by high H2 concentration and H2/CO molar ratio in the gas product, which was mainly related to the higher H/O ratio and K2O ash content of the biomass. The H2 concentration in the product gas was negatively

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Biomass steam gasification for hydrogen-rich gas production in a decoupled dual loop gasification system

Cited by 53 publications

References 40 publications

An increase in bed temperature on gasification of dual reactor fluidized bed

An increase in bed temperature on gasification of dual reactor fluidized bed

Solid Waste Gasification: Comparison of Single- and Multi-Staged Reactors

Assessing the influence of biomass properties on the gasification process using multivariate data analysis

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