Formation and Evolution Mechanism for Carbonaceous Deposits on the Surface of a Coking Chamber

Abstract

This work aimed to investigate the carbonaceous deposits on the surface of the coking chamber. Scanning electron microscopy (SEM), X-ray fluorescence spectrum (XRF), Fourier transform infrared spectrometer (FTIR), Raman spectroscopy, X-ray diffraction spectrum (XRD), and X-ray photoelectron spectroscopy (XPS) were applied to investigate the carbonaceous deposits. FTIR revealed the existence of carboxyl, hydroxyl, and carbonyl groups in the carbonaceous deposits. SEM showed that different carbonaceous deposit layers presented significant differences in morphology. XRF and XPS revealed that the carbonaceous deposits mainly contained C, O, and N elements, with smaller amounts of Al, Si, and Ca elements. It was found that in the formation of carbonaceous deposits, the C content gradually increased while the O and N elements gradually decreased. It was also found that the absorbed O 2 and H 2 O took part in the oxidation process of the carbon skeleton to form the =O and -O-structure. The oxidation and elimination reaction resulted in change in the bonding state of the O element, and finally formed compact carbonaceous deposits on the surface of the coking chamber. Based on the analysis, the formation and evolution mechanisms of carbonaceous deposits were discussed.

Gas Capture Processes

“…Wang et al [18] investigated the carbonaceous deposits on the surface of a coking chamber. Scanning electron microscopy (SEM), X-ray fluorescence spectrum (XRF), Fourier-transform infrared spectrometer (FTIR), Raman spectroscopy, X-ray diffraction spectrometry (XRD), and X-ray photoelectron spectroscopy (XPS) were applied to investigate the carbonaceous deposits.…”

Electrochemical graphitization transformation of deposited carbon for Li-ion storage: sustainable energy utilization from coke oven solid waste

“…Compared with other precursors, DC is not inferior in terms of chemical composition with a carbon content of not less than 90% and a low content of impurity elements in previous research. 24,25 Hence, it is very important to perform further purication and utilization of DC. In addition, DC originates from coke oven emissions and contains polycyclic aromatic hydrocarbons, which seriously endanger the health of operators.…”

Simulation and Application of NOX Emission Characteristics in the Vertical Flue of 6 m Coke Oven

“…According to the statistics of China Coking Industry Association, the national coke output in 2018 was 438.2 million tons, an increase of 0.8% [1], accounting for about 70% of the world's total production [2][3][4]. At present, the double flue coke oven is the main equipment of coke production, which brings economic benefits, but also causes great environmental pollution, especially nitrogen oxide pollution.…”