Abstract
ABSTRACTThis study focused on evaluating the composition structure and morphology of maize stalk stem ash (MSSA) produced after treatment at 500, 700 and 850°C calcination temperatures and after undergoing an aqueous solution treatment. This study also investigated the possibility of using MSSA in a cementing system. The grain size distribution, chemical composition and microstructure of MSSA were investigated by Laser Mastersizer, X-ray fluorescence (XRF) and scanning electron microscope (SEM). The MSSA samples obtained before and after aqueous solution treatment were analyzed using X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) to determine the Si 2p transformation behavior. The zeta potential, pH value and conductivity of the hybrid solution were tested along with the dissolving time. The grain size of MSSA was closer to the continuous gradation with increasing calcination temperatures. The dominant composition of the silica and potassium oxide were observed in the MSSA. The pH value, conductivity and zeta potential at 700°C were high compared to those at the other calcination temperatures at a certain dissolving time. A higher nucleation degree of MSSA with an increasing calcination temperature was observed by micromorphology. The presence of crystalline SiO2 was identified in MSSA-500 and MSSA-700, but not in MSSA-850. Silica was deposited on the surface of the MSSA in the form of Si-O-Si and Si-OH from the XPS spectra.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Energy Sources, Part A: Recovery, Utilization, and Environmental Effects
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.