CFD Simulation of Air-Piloted Downdraft Gasification Process: A Comparative Study Between Coal and Palm Kernel Shell as Feedstock

IF 0.4 Q4 ENGINEERING, MULTIDISCIPLINARY

International Journal of Integrated Engineering Pub Date : 2023-08-28 DOI:10.30880/ijie.2023.15.04.010

ohd Amirul Mukminin Mohd Dali, Razlin Abd Rashid, Izuan Amin Ishak, Zuliazura Mohd Salleh, Rais Hanizam bin Madon, Mohammad Zulfikar Ishak, Nor Afzanizam Samiran

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Abstract

A fixed bed downdraft gasifier model based on computational fluid dynamic (CFD) framework was developed to investigate the influence of feedstock (palm kernel shell [PKS] and coal) on the quality of syngas produced via the gasification process. Euler–Euler approach was utilized in this study to describe the gas and solid phases. Realizable k-ε turbulence model was used to evaluate the constitutive properties of the dispersed phase and the gas phase behavior. This simulation model was validated by comparing the syngas composition of gasification simulation of coal with previous research, which yielded the overall accuracy result of 83.2%. This study also highlighted that PKS gasification produced 53.74% and 90.51% higher composition of H2and CO respectively as compared to coal gasification. Whereas coal gasification produced 81.35%, 71.31% and 52.29% higher composition of CH4, H2O and CO2respectively as compared to PKS gasification. Hence, PKS produced 66.2% higher combustible gas of H2and CO than coal. PKS is thus considered as a potential renewable feedstock for gasification process as an alternative to the non-renewable coal. In addition, PKS gasification produced 52.29% lesser composition of CO2as compared to coal gasification.

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引气下气流气化过程的CFD模拟——以煤和棕榈仁壳为原料的对比研究

建立了一个基于计算流体动力学(CFD)框架的固定床下吸式气化炉模型，研究了原料(棕榈核壳[PKS]和煤)对气化合成气质量的影响。本研究采用欧拉-欧拉方法来描述气相和固相。采用可实现的k-ε湍流模型评价了分散相的本构性质和气相行为。通过将煤气化模拟合成气组成与前人研究结果进行对比，验证了该模拟模型的有效性，总体准确率达到83.2%。该研究还强调，PKS气化产生的h2和CO成分分别比煤气化高53.74%和90.51%。煤气化产生的CH4、H2O和co2分别比PKS气化高81.35%、71.31%和52.29%。因此，PKS产生的h2co可燃气体比煤高66.2%。因此，PKS被认为是一种潜在的可再生原料，用于气化过程，作为不可再生煤的替代品。此外，PKS气化产生的co2组成比煤气化少52.29%。

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来源期刊

International Journal of Integrated Engineering ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.40

自引率

0.00%

发文量

期刊介绍： The International Journal of Integrated Engineering (IJIE) is a single blind peer reviewed journal which publishes 3 times a year since 2009. The journal is dedicated to various issues focusing on 3 different fields which are:- Civil and Environmental Engineering. Original contributions for civil and environmental engineering related practices will be publishing under this category and as the nucleus of the journal contents. The journal publishes a wide range of research and application papers which describe laboratory and numerical investigations or report on full scale projects. Electrical and Electronic Engineering. It stands as a international medium for the publication of original papers concerned with the electrical and electronic engineering. The journal aims to present to the international community important results of work in this field, whether in the form of research, development, application or design. Mechanical, Materials and Manufacturing Engineering. It is a platform for the publication and dissemination of original work which contributes to the understanding of the main disciplines underpinning the mechanical, materials and manufacturing engineering. Original contributions giving insight into engineering practices related to mechanical, materials and manufacturing engineering form the core of the journal contents.