Adsorption Thermodynamics and Kinetics of Light Hydrocarbons on Microporous Activated Carbon at Low Temperatures
Adsorption Thermodynamics and Kinetics of Light Hydrocarbons on Microporous Activated Carbon at Low Temperatures
复制标题
DOI：
10.1021/acs.iecr.8b00678
复制
发表时间：
2018-05
影响因子：
4.2
通讯作者：
Florian Birkmann;C. Pasel;M. Luckas;D. Bathen
中科院分区：
文献类型：
--
作者：
Florian Birkmann;C. Pasel;M. Luckas;D. Bathen
从废气和工艺气体中去除轻质烃对于多种应用都很重要，例如在天然气处理中。然而，特别是在较低浓度下，去除 C1 和 C2 烃要么非常昂贵，要么采用标准技术不可行。 0℃以下温度下的吸附过程可能提供技术解决方案，但直到今天，还没有对低温下痕量吸附动力学的系统研究。因此，在这项工作中，我们在微孔活性炭上进行了乙烷、丙烷和正丁烷在+20至-80°C的温度范围和5至1000 Pa的浓度范围内的突破曲线实验。使用与温度相关的托特方程计算和建模平衡载荷。根据实验突破曲线的动态模拟，确定动力学参数。温度的降低会导致动力学减慢，然而，同时的容量会过度补偿...
The removal of light hydrocarbons from exhaust air and process gas is important for a variety of applications, e.g., in natural-gas treatment. However, particularly at lower concentrations, the removal of C1 and C2 hydrocarbons is either very expensive or unfeasible with standard technology. Adsorption processes at temperatures below 0 °C may provide a technical solution, but until today, no systematic study on the dynamics of trace adsorption at low temperatures is available. Therefore, in this work, we present breakthrough curve experiments of ethane, propane, and n-butane over a temperature range from +20 to −80 °C and a concentration range from 5 to 1000 Pa on microporous activated carbon. Equilibrium loadings are calculated and modeled with the temperature-dependent Toth equation. From dynamic simulations of the experimental breakthrough curves, kinetic parameters are determined. The lowering of temperature results in the slowdown of kinetics, which, however, is overcompensated by a simultaneous capa...