Studies of Fe Metal Carburization by Carbon Monoxide Using XRD and TPR Techniques

Abstract

This study was undertaken to investigate the effect of carburization of metallic Fe by (20%,v/v) carbon monoxide (CO). Carburization of Fe by carbon monoxide was examined by using temperature-programmed reduction (TPR), X-Ray powder diffractometry (XRD) and Carbon Hydrogen Nitrogen Sulfur (CHNS) technique. Based on a thermodynamic calculation, the free energy Gibb’s value to produce carbon is-8.08 kcal/mol which are favorable. However, production of iron carbide from the same reaction, the free energy Gibb’s value is +9.24 kcal/mol which is not feasible. From the XRD results, shows that after carburization of Fe, the peak appears only for Fe but there is a broad peak between 20 – 30°. The peak might be indicated as carbon in amorphous form. This finding is supported by the percent of carbon content in CHNS analysis which are increasing when the temperature is increased. This shows that after carburization the carbon content is increasing with increasing in temperature due to carbon deposited on metallic iron. In this research, three different temperatures were used which are 300°C, 500°C and 700°C.

Chemical Reduction Behaviour of NiO under Various Concentration of Carbon Monoxide Using TPR and XRD Techniques

“…This finding has been further proved through XRD analysis. This finding also has been supported through previous research [5]. The peak between 2θ: 20-25 was due to the presence of carbon in semi-amorphous form.…”

Preparation of Monolayer Dispersed Fe/Attapulgite Desulfurizer and Its Desulfurization Performance at Low Temperature

“…There were four peaks around 230 °C, 480 °C, 595 °C and 750 °C, which corresponded to characteristic peaks of the removal of constitutional water and crystal water in ATP [20] . The reduction processes of iron oxides were divided into three steps, which included the low‐temperature reduction of Fe 2 O 3 →Fe 3 O 4 , the medium‐temperature reduction of Fe 3 O 4 →FeO, and the high‐temperature reduction of FeO→Fe, the corresponding reduction temperature was at around 300 °C, 440 °C, and 730 °C, respectively [21] . The Fe/ATP‐11 exhibits the reduction peak was almost peaks of ATP lost water, it could be attributed to the content of iron oxides that participated in the reaction were low.…”

“…[20] The reduction processes of iron oxides were divided into three steps, which included the low-temperature reduction of Fe 2 O 3 !Fe 3 O 4 , the medium-temperature reduction of Fe 3 O 4 !FeO, and the hightemperature reduction of FeO!Fe, the corresponding reduction temperature was at around 300 °C, 440 °C, and 730 °C, respectively. [21] The Fe/ATP-11 exhibits the reduction peak was almost peaks of ATP lost water, it could be attributed to the content of iron oxides that participated in the reaction were low. Fe/ATP-25 began to observe reduction peaks of iron oxides.…”