Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6641330 | Fuel | 2013 | 6 Pages |
Abstract
Steelmaking slag contains high amounts of CaO, Fe2O3, SiO2, and Al2O3, and has great potential as a catalyst for the tar-reforming reaction to produce a carbon composite and hydrogen. This paper describes chemical waste-heat recovery of tar and the effects of slag on the tar-reforming reaction. The results indicate that slag has a good activity for decomposing tar into the gas phase and for producing high carbon content within the slag. The introduction of coal-pyrolysis products to slag at a temperature of 500 °C caused an 18%vol increasing in the gas amount and a 6%mass enhancing in the carbon content within the slag compared to coal pyrolysis without slag. At higher temperatures, coal pyrolysis gave rise to lower carbon deposition within the slag but a higher amount of gas product. Moreover, the gas reforming reaction occurred simultaneously with tar decomposition at higher temperatures. This proposed system offers energy-saving benefits of 103 MJ/ton steel and a 6%mass reduction in coke-breeze usage in the steelmaking industry.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Rochim Bakti Cahyono, Alya Naili Rozhan, Naoto Yasuda, Takahiro Nomura, Sou Hosokai, Yoshiaki Kashiwaya, Tomohiro Akiyama,