Hydrothermal Green Synthesis of a Robust Al Metal-Organic- Framework Effective for Water Adsorption Heat Allocations

Author(s)

Cho, Kyung Ho ; Borges, D. Damasceno ; Lee, Ji Sun ; Park, Jaedeuk ; Cho, Sung June ; Jo, Donghui ; Lee, U-Hwang ; Maurin, Guillaume ; Chang, Jong-San

• Document type: Journal article
• Source: ACS SUSTAINABLE CHEMISTRY & ENGINEERING; v. N/A, p. 10-pg., 2022-05-16.

Abstract

To minimize the huge global energy consumption for cooling and heating, adsorption-based heat allocation devices operating with an "adsorbent-water" working pair have received great interest over the last decades. Herein, we report scalable green synthesis of an Al-based metal-organic framework (Al-MOF) in water built from the assembly of inorganic Al helix chains linked to pyridine dicarboxylate linkers that delimits a three-dimensional structure proven to be isoreticular to CAU-10H and denoted as CAU-10pydc. This channel-like MOF exhibits attractive water sorption properties with an S-shaped adsorption isotherm associated with a major water uptake in the range of P/P degrees = 0.015-0.17 and a good working capacity (0.31 mLH(2)O mL(-1)MOF) under lowtemperature cooling conditions of the adsorption-driven heat allocation system (T-evaporator(ev) = 5 degrees C, T-adsorption(ads) and T-condensation(con) = 30 degrees C, and T-desorption(des) = 80 degrees C), along with exceptional coefficient of performances for both cooling (0.79) and heating (1.72) together with a useful and sustainable heat source accessible from a solar source and good specific heat capacity (212.9 kWh m(-3)MOF) and heat storage capacity (273.5 kWh m(-3)MOF). The molecular adsorption mechanism was finally investigated computationally demonstrating the predominant role played by the formation of hydrogen-bonding between water molecules and the hydroxyl functionality of the MOF. (AU)

• FAPESP's process: 13/08293-7 - CCES - Center for Computational Engineering and Sciences
• Grantee: Munir Salomao Skaf
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC