Carbon consumption and adsorption-regeneration of H2S on activated carbon for coke oven flue gas purification

Carbon consumption of activated carbon varies with sulfur-containing products. In this work, differential thermogravimetric (DTG), electron paramagnetic resonance (ESR), X-ray photoelectron spectroscopy (XPS), and temperature programmed desorption (TPD) we re used to reveal the adsorption-regeneration process H2S effect adsorption products on consumption. The results show that reacts C=C bond form C-S as an intermediate state, followed by formation elemental sulfur. It directly sublimates at approximately 380 °C, about 30 °C higher than decomposition H2SO4. thermal regeneration process, sulfur in monoclinic (S8) first breaks into infinitely long chain molecules (S?) then small molecules, finally vapor. consumes less oxygen functional groups, reducing chemical 59.8% H2SO4; moreover, compressive strength reduces due its slight disordered graphitic structure. also C=O H2SO3 or does not require H2SO4 needs react release SO2, CO2, CO, significantly decreases. originates from two aspects; one is more twice other oxygen-containing groups.