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Being a promising potential source for natural gas, methane hydrate (MH) is attracting increasing interest due to its great amount and diverse geographic distribution. The formation of MH is significantly influenced by the properties of sediment media such as porosity and permeability. In this study, in order to have a better understanding on the relationship between MH formation behavior and sediment...
Chemical-structural properties of the coke produced by crude oil low temperature oxidation (LTO) reactions during in-situ combustion are still highly lacking due to the difficulty in coked sand characterization. This study proposed an experimental methodology to prepare the useful LTO coke with the chemical-structural properties studied using a combination of Energy-dispersive X-ray spectroscopy,...
CaO is a traditional desulfurizer used in coal combustion, and it is also a widely applied chemical conditioner in sewage sludge dewatering. In this study, the feasibility of co-combustion of CaO-conditioned sludge (Sc-CaO) and coal was discussed, including combustion characteristics and gas pollutants emission. The results show that adding 30% Sc-CaO into co-combustion strengthened the procedure...
In order to control the emissions of NOx precursors during sewage sludge pyrolysis, we proposed a novel integrated pretreatment method based on Fenton peroxidation and CaO conditioning. Nitrogen transformation was investigated using a self-designed drop-tube/fixed-bed furnace, and the mechanism of influence of residual conditioners was further clarified by employing model compounds. According to the...
The oxidation characteristics and products of five ethers – ethyl tert-butyl ether (ETBE), methyl tert-butyl ether (MTBE), dimethyl ether (DME), diethyl ether (DEE), and diisopropyl ether (DIPE) – were determined using an accelerating rate calorimeter (ARC) at low temperatures. Oxidation temperature and pressure were calculated using temperature–time (T–t) and pressure–time (P–t) plots, and reaction...
Iron- and calcium-based compounds play an important role in the devolatilization stage of solid fuels thermal disposal. This study aims to investigate the synergistic effects of Fenton’s reagent (Fe2+/H2O2) and conditioner CaO on product distribution and sulfur transformation in this process. Four samples were pyrolyzed by using a special drop-tube/fixed-bed furnace at 873–1273K with a high heating...
Product distributions and sulfur transformation during sewage sludge pyrolysis are essential to subsequent thermal disposal process, both of which are strongly affected by calcium-based compounds. Considering that lime (CaO) is widely applied in sludge conditioning pre-treatment, this study investigated the dual role of conditioner CaO in sludge pyrolysis behavior and sulfur evolution at the temperature...
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