Multi-air-pollutant removal by using an integrated system: Key parameters assessment and reaction mechanism.

How to cost-efficiently and cooperatively remove SO, NO and Hg in flue gas is a hot topic in the field of air pollution control. This work developed an integrated system that consists of a dual-absorption system and a vapor oxidation system, in which NaCO and HO/NaSO were used as the absorbent and oxidant. The results indicated that the efficiencies of SO removal and NO conversion reached 99.

Radical-induced oxidation removal of multi-air-pollutant: A critical review.

Sulfur dioxide (SO), nitric oxide (NO) and elemental mercury (Hg) are three common air pollutants in flue gas. SO and NO are the main precursors for chemical smog and Hg is a bio-toxicant for human. Cooperative removal of multi-air-pollutant in flue gas using radical-induced oxidation reaction is considered as one of the most promising methods due to the high removal efficiency, low cost and less secondary environmental impact.

Simultaneous Removal of SO and NO Using a Novel Method of Ultraviolet Irradiating Chlorite-Ammonia Complex.

A novel advanced oxidation process (AOP) using ultraviolet/sodium chlorite (UV/NaClO) is developed for simultaneous removal of SO and NO. NHOH, as an additive, was used to inhibit the generation of ClO and NO. The removal efficiencies of SO and NO reached 98.

Elemental mercury removal by a novel advanced oxidation process of ultraviolet/chlorite-ammonia: Mechanism and kinetics.

A novel advanced oxidation process (AOP) of ultraviolet/chlorite-ammonia (UV/NaClO-NHOH) was developed to remove Hg from flue gas. The distribution of mercury concentration in three solutions of NaClO-NHOH, KCl, and HSO-KMnO was determined by cold atom fluorescence spectrometry (AFS). The role of NHOH was to help NaClO preserving and/or stabilizing Hg meanwhile inhibiting the photo-production of ClO.

A novel method of ultraviolet/NaClO-NHOH for NO removal: Mechanism and kinetics.

The key step for nitric oxide (NO) removal using oxidation method is to efficiently oxidize NO. This study developed a novel advanced oxidation process (AOP) of ultraviolet light (UV) catalysis of chlorite (NaClO) to oxidize NO. The production of nitric dioxide (NO) and photo-production of chlorine dioxide (ClO) were suppressed by adding ammonium hydroxide (NHOH).

Combustion behavior, emission characteristics of SO, SO and NO, and in situ control of SO and NO during the co-combustion of anthracite and dried sawdust sludge.

The combustion behaviors of anthracite and dried sawmill sludge (DSS) were studied using thermogravimetric analysis (TGA) and derivative thermogravimetric analysis (DTG). DSS was found to be a promoter for anthracite combustion, the addition of DSS in anthracite decreased the burnout temperature and time. But DSS caused the rapid releases of SO and NO in the initial combustion stage.