ABSTRACT

Lithium orthosilicate has the highest absorption capacity among other materials used to capture carbon dioxide (CO₂) at a higher temperature. To design a CO₂ adsorption system consisting of lithium orthosilicate pebble bed, effective thermal conductivity and heat transfer coefficient data are necessary, and till date, these are not reported in the literature. In the present study, experiments were conducted to estimate the effective thermal conductivity and heat transfer coefficient of lithium orthosilicate pebble bed in CO₂–air medium. Effects of CO₂ concentration in air, bed temperature, and gas flowrate on the hydrodynamic as well as heat transfer properties of the pebble bed of lithium orthosilicate pebbles were also studied. The effective thermal conductivity and heat transfer coefficients were found in the range of 0.2–0.75 Wm⁻¹K⁻¹ and 14–63 Wm⁻²K⁻¹, respectively.

摘要

在用于在较高温度下捕获二氧化碳 (CO _{2 ) 的其他材料中，原硅酸锂具有最高的吸收能力。}要设计由原硅酸锂球床组成的CO ₂吸附系统，需要有效的导热系数和传热系数数据，但迄今为止，这些数据尚未见文献报道。_{在本研究中，进行了实验以估算原硅酸锂球床在 CO 2} -空气介质中的有效导热系数和传热系数。CO _2的影响还研究了空气中的浓度、床温和气体流速对原硅酸锂球石球床的流体动力学和传热性能的影响。有效导热系数和传热系数分别在 0.2–0.75 Wm ^-1 K ^-1和 14–63 Wm ^-2 K ^-1范围内。