Production of Heavy Fuel Oil Fly Ash (HFO)-based Geopolymers for Passive Cooling Systems

摘要

This work aims to investigate the production of heavy fuel oil fly ash (HFO)-based geopolymers for passive cooling systems. The processing technique entails adding HFO as the porous filler material to a geopolymer matrix derived from metakaolin. A weight ratio of 10% - compared with the powder precursor (metakaolin) - was added to the metakaolin-based geopolymer. X-ray diffraction (XRD) analysis showed that the HFO-based geopolymer comprised two amorphous phases: gel and HFO particles. The HFO-based geopolymer cement exhibited a flexural strength of 7.5 MPa, and compressive strengths of 31 MPa and 28 MPa, respectively under dry and immersed conditions. The geopolymer featured high surface humidity compared with reference geopolymers. Experimental results prove that introducing HFO particles as porous filler will lower the heat rate of the chamber at 40°C. The general evaluation of the HFO-based geopolymer cement produced from metakaolin and HFO porous particles indicates its potential for a number of applications, including passive cooling systems.