The Thermodynamics of Gasification

Higman, Christopher; Burgt, M. van der

doi:10.1016/b978-0-7506-8528-3.00002-x

Cited by 71 publications

(146 citation statements)

References 1 publication

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“…Coal gasification is an efficient technology for coal utilization due to its high carbon conversion and its contribution to the reduction of air pollutant emissions [2]. Biomass gasification is also one of the most promising technologies because of its ability to rapidly convert large amounts and various kinds of biomass into easily storable and transportable gas or liquid fuel [3,4].…”

Section: Introductionmentioning

confidence: 99%

Kinetic models comparison for non-isothermal steam gasification of coal–biomass blend chars

Fermoso

Gil

Pevida

et al. 2010

Chemical Engineering Journal

121

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The non-isothermal thermogravimetric method (TGA) was applied to a bituminous coal (PT), two types of biomass, chestnut residues (CH) and olive stones (OS), and coalbiomass blends in order to investigate their thermal reactivity under steam. Fuel chars were obtained by pyrolysis in a fixed-bed reactor at a final temperature of 1373 K for 30 min. The gasification tests were carried out by thermogravimetric analysis from room temperature to 1373 K at heating rates of 5, 10 and 15 K min -1 . After blending, no significant interactions were detected between PT and CH during co-gasification, whereas deviations from the additive behaviour were observed in the PT-OS blend.However, for the two coal-biomass blends, the gasification behaviour resembled that of the individual coal, as this component constituted the larger proportion of the blend. The temperature-programmed reaction (TPR) technique was employed at three different heating rates to analyze noncatalytic gas-solid reactions. Three nth-order representative gas-solid models, the volumetric model (VM), the grain model (GM) and the random pore model (RPM) were applied in order to describe the reactive behaviour of the chars during steam gasification. From these models, the kinetic parameters were determined.The best model for describing the reactivity of the PT, PT-CH and PT-OS samples was the RPM model. VM was the model that best fitted the CH sample, whereas none of the models was suitable for the OS sample.

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Section: Introductionmentioning

confidence: 99%

Kinetic models comparison for non-isothermal steam gasification of coal–biomass blend chars

Fermoso

Gil

Pevida

et al. 2010

Chemical Engineering Journal

121

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“…생성된 합성가스 는 가스터빈과 스팀터빈을 이용한 복합발전(Integrated Gasification Combined Cycle, IGCC)에 활용하거 나 메탄, 수소 또는 액체 수송연료를 합성하는데 이 용된다 [1].…”

Section: 서 론unclassified

Numerical Simulations on the Thermal Flow and Particle Behaviors in the Gas Reversal Chamber of a Syngas Cooler for IGCC

Park¹,

Ye²,

Ryu³

et al. 2013

Journal of the Korean Society of Combustion

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In the Shell coal gasification process, the syngas produced in a gasifier passes through a syngas cooler for steam production and temperature control for gas cleaning. Fly slag present in the syngas may cause major operational problems such as erosion, slagging, and corrosion, especially in the upper part of the syngas cooler (gas reversal chamber, GRC). This study investigates the flow, heat transfer and particle behaviors in the GRC for a 300 MWe IGCC process using computational fluid dynamics. Three operational loads of 100%, 75% and 50% were considered. The gas and particle flows directly impinged on the wall opposite to the syngas inlet, which may lead to erosion of the membrane wall. The heat transfer to the wall was mainly by convection which was larger on the side wall at the inlet level due to the expansion of the cross-section. In the evaporator below the GRC, the particles were concentrated more on the outer channels, which needs to be considered for alleviation of fouling and blockage.

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“…Despite the extensive experience in operating gas generators [10,11], there are many technical and technological problems, including stability and efficiency of gas generators, low calorie of the synthesis gas, and specific characteristics of various types of fuel.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Research on gasification of low-grade fuels in a continuous layer

Mysak

Lys

Martynyak-Andrushko

2017

EEJET

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За результатами експериментальних досліджень отримано регресійні залежності теплоти згорання синтез-газу під час газифікації низькосортних палив від фракційного складу палива, кількості повітря, висоти шару палива. Знайдено раціональні значен-ня фракційного складу, кількості повітря, яке пода-ється у камеру газифікації, та висоти шару палива у камері газифікації, при яких нижча теплота згоран-ня синтез-газу досягає максимуму Ключові слова: нижча теплота згорання, син-тез-газ, газифікації низькосортних палив, регресійні залежності По результатам экспериментальных исследова-ний получены регрессионные зависимости теплоты сгорания синтез-газа при газификации низкосортных топлив от фракционного состава топлива, количе-ства воздуха, высоты слоя топлива. Найдены рацио-нальные значения фракционного состава, количества воздуха, подаваемого в камеру газификации, и высо-ты слоя топлива в камере газификации, при кото-рых низшая теплота сгорания синтез-газа достига-ет максимума Ключевые слова: низшая теплота сгорания, син-тез-газ, газификации низкосортных топлив, регрес-сионные зависимости UDC 674.8:662.765.1

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The Thermodynamics of Gasification

Cited by 71 publications

References 1 publication

Kinetic models comparison for non-isothermal steam gasification of coal–biomass blend chars

Kinetic models comparison for non-isothermal steam gasification of coal–biomass blend chars

Numerical Simulations on the Thermal Flow and Particle Behaviors in the Gas Reversal Chamber of a Syngas Cooler for IGCC

Research on gasification of low-grade fuels in a continuous layer

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