Variations of trace metals in combustion chamber deposit in landfill gas engine a long period of time

Orhan Sevimoğlu; Özge Östürk Sömek

doi:10.1016/j.jhazmat.2023.131880

Variations of trace metals in combustion chamber deposit in landfill gas engine a long period of time

J Hazard Mater. 2023 Sep 15:458:131880. doi: 10.1016/j.jhazmat.2023.131880. Epub 2023 Jun 16.

Authors

Orhan Sevimoğlu¹, Özge Östürk Sömek²

Affiliations

¹ Gebze Technical University, Department of Environmental Engineering, Gebze, Kocaeli 41400, Turkey. Electronic address: sevimoglu@gtu.edu.tr.
² Gebze Technical University, Department of Environmental Engineering, Gebze, Kocaeli 41400, Turkey.

PMID: 37364437
DOI: 10.1016/j.jhazmat.2023.131880

Abstract

The combustion chamber deposit (CCD) is a major problem for the gas engines that formed accumulating of the metal oxides during the oxidation of trace compounds in the landfill gas (LFG). Therefore, the LFG was purified with activated carbon (AC) before in use to reduce deposit formation in gas engines. The AC treatment demonstrated the high removal capacity by reducing to below 1 % of the mass ratios of Si and Ca in the deposit. Unfortunately, the AC treatment caused the formation of black deposit in the intercooler that was analyzed by EDS and XRD. First time in this study, the variation of the elements of the CCD was comparatively investigated over a long period of time in 2010 and in 2019 without -AC treatment of LFG. The variation of the concentrations of C, Ca, N, S, Sb, Si- and Sn in the CCD were confirmed by the analysis with ICP-OES and SEM-EDS for 9-year period. It was determined with EDS analysis that while Sb and Sn were relatively low, C and N were high based on 2010. It has been determined that there is a proportional change depending on the time of the elements forming in the deposit.

Keywords: Activated carbon treatment; Deposit composition; Elemental analysis; Landfill gas.