Development of scrubber with nano-TiO2 coated packing for H2S removal

Approaches to mitigation of hydrogen sulfide during anaerobic digestion process – A review

“… Costs are often involved in building the stripping tower No data [ 172 , 173 ] Wet scrubbing Simple to operate Strong adaptability and high efficiency High energy demand for the regeneration process High corrosiveness of equipment surfaces When employing NaOH, it costs roughly US$2.38/m 3 . [ 174 , 171 , 134 ] Aerobic biological technology Energy costs are reduced because the process can take place at ambient temperature It is a time-consuming method No data [ 175 , 176 ] Biofiltration No harmful byproducts are being generated. High removal efficiency Simple to operate.…”

Removal of Gaseous Hydrogen Sulfide by a FeOCl/H2O2 Wet Oxidation System

“…Thus, to reduce H 2 S emissions, a large number of H 2 S removal technologies have been developed to date, including adsorption/catalytic desulfurization, − biodesulfurization, membrane separation, , and washing desulfurization. − More specifically, the adsorption desulfurization process is simple and the level of investment required is low; however, the regeneration energy consumption is high, and the adsorbent is easily deactivated. , In contrast, the biological desulfurization technology can operate at room temperature and pressure, its operating costs are low, and it does not tend to cause secondary pollution; however, in the presence of high concentrations of H 2 S, treatment is slow, and the process efficiency tends to be poor . In addition, the membrane separation technology is easily operated and boasts both a high separation efficiency and a low level of pollution; however, the membranes exhibit poor corrosion resistances and short service lives, in addition to being particularly expensive. , In terms of the chemical washing desulfurization technology, the operation is also simple, and this process exhibits strong adaptability and a high desulfurization rate, resulting in it being the most widely used and mature technology at present. ,, Nonetheless, the most commonly used traditional absorbents for this process, including ethanolamine and carbonate, require high amounts of energy for their regeneration . In contrast, the wet (solution) oxidation desulfurization technology does not suffer from issues related to absorbent regeneration, the process and equipment required are simple, and a high sulfur recovery tends to be achieved.…”

“…19,20 In terms of the chemical washing desulfurization technology, the operation is also simple, and this process exhibits strong adaptability and a high desulfurization rate, resulting in it being the most widely used and mature technology at present. 3,21,23 Nonetheless, the most commonly used traditional absorbents for this process, including ethanolamine and carbonate, require high amounts of energy for their regeneration. 3 In contrast, the wet (solution) oxidation desulfurization technology does not suffer from issues related to absorbent regeneration, the process and equipment required are simple, and a high sulfur recovery tends to be achieved.…”

Efficient Cleaning and Heat Recovery of Flue Gas from a Small‐Scale Boiler

“…The various types of packing material differ in their geometric structure and constituent substances (e.g., metals, ceramics, plastics, and seashells), and they are selected according to the operating conditions [15]. The large surface area provided by the packing material plays a crucial role in the efficiency of the wet-scrubber process in that it increases the rate of PM mass transfer between the flue gas and the absorption solution [13,16,17]. The liquid absorber solution removes the PM through inertial force for the particulate diameter range of 5-10 mm.…”

“…Different mechanisms have been used for the separation of PM from flue gas, and in this regard, the economic aspects for small-scale boilers are important. According to the literature, when comparing the various gas purification methods, packed-bed wet scrubbers (chemical scrubbers and bio-scrubbers) have proven to be the most attractive technologies due to their low price, high efficiency, and ability to remove solid and liquid pollutants [8][9][10][11][12][13]. The conventional mechanism of the wet scrubber with a packed bed (the chemical scrubber) involves the capture of PM from flue gas by passing the gas stream through a column filled with packing material, with the absorption solution being supplied to the packing material [8].…”