THE KINETICS OF CaO ASSISTED PATTUKKU CHARCOAL STEAM GASIFICATION

Reaktor Pub Date : 2018-05-28 DOI:10.14710/REAKTOR.18.1.16-21

T. Syarif, H. Sulistyo, W. B. Sediawan, Budhijanto Budhijanto

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Abstract

Abstract Coal is a solid fuel that can be converted into syngas through gasification process. To obtain optimum gasification process design and operation, in-depth understanding of the influential parameters is required. This study aims to investigate the effect of temperature on the gasification process and to obtain its kinetics parameters. The study was carried out in a tubular reactor equipped with a heater and a condenser. Steam was used as gasifying agent, while CaO was employed as a CO2 adsorbent. The charcoal from coal was subjected to gasification at temperatures of 600°C, 700°C, and 800°C. The ratio of charcoal and CaO was 1:1. The gasification process lasted for 60 minutes with gas sample was taken every 15 minutes for composition analysis. The results showed that a temperature increase of 100°C caused a proportional increase of conversion of about 75% higher. The value of activation energy (Ea) and exponential factor (ko) were 46.645kJ/mole and 328.3894/min, respectively. For mass transfer parameters, values of activation energy for surface diffusion (Es) and surface diffusivity factor (as) were 81.126 kJ/mole and 0.138/min, respectively. Keywords: gasification; mathematical model; Pattukku coal char; steam; Thin Reaction Zone Model

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CaO辅助巴土库炭蒸汽气化动力学研究

煤是一种固体燃料，可以通过气化过程转化为合成气。为了获得最佳的气化工艺设计和操作，需要深入了解影响气化工艺的参数。本研究旨在探讨温度对气化过程的影响，并获得其动力学参数。这项研究是在一个装有加热器和冷凝器的管式反应器中进行的。以蒸汽为气化剂，CaO为CO2吸附剂。煤中的木炭在600°C、700°C和800°C的温度下进行气化。炭与CaO的比例为1:1。气化过程持续60分钟，每15分钟取气样进行成分分析。结果表明，温度升高100℃，转化率成比例提高约75%。活化能Ea和指数因子ko分别为46.645kJ/mol和328.3894/min。对于传质参数，表面扩散活化能Es和表面扩散因子as分别为81.126 kJ/mol和0.138 kJ/ min。关键词:气化;数学模型;巴土库煤焦;蒸汽;薄反应区模型

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Reaktor

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2 weeks