Applications of organic phase change materials embedded in adsorbents for controlling heat produced by charging and discharging natural gas

Abstract

This paper studied the thermal effect resulting from the adsorption of natural gas on both charge and discharge on an absorbed storage system using a phase change material (PCM) as heat exchanger. A kind of organic PCM whose phase change heat is 153 J/g, measured by DSC,consisting of decanoic acid and lauric acid was prepared. The PCM was used to control the heat effect during the adsorption and desorption of natural gas. By adding the volume ratio of 6.10 % of the PCM into the adsorption tank, the temperature change can be reduced 21.8°C during adsorption and can be increased 22.7°C during desorption. Meanwhile, the delivered natural gas volume was increased 39.4 % with the use of the PCM compared to the case without PCM for a 0-3.5 MPa of pressure swing. Application of this kind of cheap PCM in the adsorption tank is an effective method to reduce the adverse effects of adsorption heat and thereby enhance storage capacity and delivery.

Phase Change Material‐Containing Mesoporous Zeolite Composite for Adsorption Heat Recovery

“…Gas storage, adsorption heat pump (AHP), and pressure swing adsorption (PSA) processes are well‐known examples of short‐time adsorption processes. [ 17–20 ]…”

“…Thus, the application of a PCM capsule or PCM‐containing metallic void to the adsorption process prevents the drastic increase in temperature usually observed in this process. [ 19,21 ] As a possible target of the PCM‐containing adsorbent, a short‐time adsorption process is considered, such as gas storage, PSA, and AHP, where adsorption heat recovery is required. Therefore, hydrogen, carbon dioxide, and water are potential targeted molecules via adsorption, by the PCM‐containing adsorbent.…”

“…In the adsorption process, the adsorption performance of the material is significantly affected by the increased adsorbent temperature due to the released heat of adsorption 16 . Therefore, methods to improve adsorption heat removal have been extensively studied [17][18][19][20] . Particularly, in short-time adsorption processes, the period for cooling the adsorbent is extremely short and hence, rapid removal of the heat of adsorption is essential to avoid degradation of the adsorption performance.…”

“…Particularly, in short-time adsorption processes, the period for cooling the adsorbent is extremely short and hence, rapid removal of the heat of adsorption is essential to avoid degradation of the adsorption performance. Gas storage, adsorption heat pump (AHP), and pressure swing adsorption (PSA) processes are well-known examples of short-time adsorption processes [17][18][19][20] .…”

Parametric Study of Fixed-Bed Dehumidification Using a PCM-Containing Adsorbent for Effective Recovery of Heat of Adsorption

“…In latent heat storage systems using PCM, rubber spheres (Toledo et al, 2013), metal voids (Li and Li, 2015), and polymer capsules (Rady et al, 2009) have been reported as PCM containers, which are relatively large in diameter, ranging from 1 to 40 mm. For PCM-containing polymer capsules, the fabrication of nano-or micrometer-sized PCM-containing polymer capsules has been studied as a means to improve thermal conductivity (Mochane and Luyt, 2012;Sari et al, 2014;Li et al, 2017).…”