The analysis of organic matter in coke oven emissions

Thermodynamic analysis of hydrogen production from raw coke oven gas via steam reforming

“…(6-11, 19, 20) accelerated by adding extra water. At lower temperatures, the hydrogen mole number in the equilibrium compositions was lower than the origin one (43.3 mol) in the RCOG, with the methane mole number higher than the origin one ( (6)(7)(8)(9)(10)(11)] dominant. Noteworthy, due to no involvement of the reaction dynamics and the purpose of the Gibbs free energy minimization of the whole reaction system, in thermodynamic processing RCOG reacted itself in the temperature range via the reactions in Table 2, possibly to some extent causing the thermodynamic result not very coherent with actual one.…”

“…For one thing, using this method, only original hydrogen in coke oven gas was collected with other components in coke oven gas (such as CO, CH 4 , tar and other hydrocarbons) yet not rationally used (normally as fuel to be directly combusted). Among the unused components, tar accounted for about 30 % of the total RCOG mass [9], but due to existing as a kind of viscous liquid below 500°C, tar seems necessary to be removed via ammonia solution spraying to avoid equipment blockage [10], yet following with great ammonia consumption and water pollution. Although the removed tar can be further processed into naphthaline, phenol, benzene and other chemical products, these benefits cannot compensate for the COG cleaning fee.…”

Fugitive Coke Oven Gas Emission Profile by Continuous Line Averaged Open-Path Fourier Transform Infrared Monitoring

“…Although many studies [3][4][5][6] have expressed various concerns over the high level of polycyclic aromatic hydrocarbons to which coke oven workers are exposed, occupational hygienists 3 are becoming increasingly aware of the presence of many nonpolyaromatic hydrocarbon compounds (e.g., benzene, a carcinogen) in coke oven emissions. Therefore, a closer study of nonpolyaromatic hydrocarbon compounds is equally important to understanding the coke oven environment and what workers there are exposed to.…”

Hydrogen Production by Catalytic Partial Oxidation of Coke Oven Gas in BaCo0.7Fe0.3-xZrxO3-δCeramic Membrane Reactors

“…Of these methods, coke oven gas (COG), a by-product generated during the production of coke from coal, has attracted much interest as one of the most promising high quality sources of hydrogen [3,4]. The separation of oxygen from air and catalytic partial oxidation of methane (POM) in COG has been achieved in a mixed ionic-electronic conducting (MIEC) membrane reactor, which significantly reduces the energy consumption and cost of hydrogen production compared to the conventional processes [5].The COG exhibits strong reducibility because its main components are 54-59% H 2 , 24-31% CH 4 , and 5.5-7% CO [6]. Therefore, structural stability under a reductive atmosphere and high oxygen permeability are expected for a MIEC membrane to meet the requirements of practical applications.…”