هل ستصبح شريكنا القادم ؟
Gas Desulfurization (H₂S removal) Technologies. Common H₂S removal technologies for H₂S removal from biogas fall into one of the following: Absorption into a liquid either water or caustic solution, Adsorption on a …
Read More
Refinement of products through desulfurization also depends on a number of parameters, such as excess desulfurization equipment, the nature of refinery organization, the quality of used crude oil, and the quality of the products being produced. Desulfurization of organically bound sulfur is carried out to a certain limit through the …
Read More
This fly ash-based zeolite (Gismondine) was active for desulfurization of a model feed of TH (500 ppm S) and BT (500 ppm S) with 43% and 63.5% sulfur removal efficiency [125]. Dolochar is a waste by-product of the sponge iron industry. It is a black coal-like crystalline material containing SiO 2, Al 2 O 3, Fe 2 O 3, CaO, MgO, and fixed …
Read More
Depending on hot metal quality, types and quantity of desulfurization reagents used, raking equipment, and raking operation, the generation rate of hot metal desulfurization slag varies, typically in the range of 15 to 25 kg/t hot metal. ... iron ores and fluxes or desulfurization reagents with a low level of sulfur. Clearly, oxidation ...
Read More
1. Introduction. Hydrogen sulfide (H 2 S) is one of the major concerns in civil activities [] and industrial processes [] where it represents an undesired compound for many different reasons.It poses serious safety challenges at a small and large scale owing to accidental releases, whose critical conditions are rapidly reached in case of fugitive …
Read More
H 2 S in industrial raw gas and industrial waste gas can cause equipment corrosion and catalyst poisoning, ... Fig. 4 shows that current efficiency of electrolytic regeneration of desulfurization of iron complex is up to 91% at the electrode potential of 0.3V and it is about 90% from 0.25V to 0.50V. Current efficiency on the stainless-steel ...
Read More
The desulfurization rate of the synthesized iron-based ionic liquid is over 90%. The red mud desulfurization method adopts the idea of waste treatment to …
Read More
Benefits: - Iron compounds are dosed inside bioreactors - there is no need to build additional external communications and additional equipment; - Dissolved hydrogen sulfide binds to iron compounds, precipitates in the form of iron sulfides and is excreted together with the digestate as bio-fertilizer; - High effect of desulfurization; - Low ...
Read More
Semi-dry flue gas desulfurization ash (SFGDA) is an abandoned Ca and S resource that is currently stacked without appropriate disposal methods. A technology with …
Read More
Here we show that cysteine desulfurization by a phosphine can be effected efficiently by micromolar concentrations of iron under aerobic conditions in hydrogen carbonate buffer, that is using conditions that are reminiscent of iron-catalyzed oxidation phenomena occurring in natural waters.
Read More
The basic principle of deep desulfurization of sintering flue gas in iron and steel plant based on the low-temperature oxidation method is to use sodium hydroxide …
Read More
The kinetics and reaction mechanisms of hot metal desulfurization using CaO and CaC2 were studied in a well-controlled atmosphere with a lab scale high temperature furnace. The growths of CaS around CaO and CaC2 were measured and compared at 1773 K (1500 °C). The parabolic rate constant was evaluated to be 5 × 10−7 …
Read More
number of industrial flue gas desulfurization equipment has been constructed. Industrial flue gas desulfurization equipment in China will reach 109,200 sets in 2025 [7, 8]. ... process, which is widely used in electric power, iron and steel, non-ferrous metals, and other industries [9, 10]. Industrial flue gas desulfurization can effectively ...
Read More
3. I. By Catalytic Desulfurization: Hydrodesulfurization (HDS), the industry standard method of removing sulfur in petroleum refining operations, uses types of catalysts to add hydrogen in order to reduce unwanted sulfur compounds. Unfortunately, the HDS process typically requires expensive, high-pressure (up to 1,000 psig), high-temperature …
Read More
Molten iron desulfurization slag (DS) is the tail slag produced in the pre-desulfurization process of molten iron. ... The ball mill is an SM-500 (Hebei Instrument Equipment Co., Ltd., China) equipped with 100 kg grinding medium. The dried DS and SS (5 kg, respectively) were both grounded in a ball mill for 40 min. ...
Read More
Published: 31 August 1893. Desulphurisation of Iron. JOHN PARRY. Nature 48, 427–428 ( 1893) Cite this article. 612 Accesses. Metrics. Abstract. THE elimination of sulphur from …
Read More
The sulfidation behaviors of iron-based sorbent with MgO and MgO-TiO2 are studied under different isothermal conditions from 623 to 873 K in a fixed bed reactor. The results of sorbents sulfidation experiments indicate that the sorbents with MgO and TiO2 additives are more attractive than those without additives for desulfurization of hot coal gas. The …
Read More
Desulfurization is a critical process for biogas upgrading to biomethane, because hydrogen sulfide is toxic and corrosive. In this paper, we conduct a systematic review to check the most recent studies on desulfurization technologies and find trends, potentials, and limitations of each technique. The information of 51 articles published …
Read More
main contributors, and the operation of flue gas desulfurization and denitrification equipment in i ndustrial production (including electricity production) affects the concentration of pollutants. On the other hand, Jeong et al. ( 2004) found that sulfate (SO 4 2–) accounted for more than 23% and 38% of PM 2.5 mass in
Read More
There are four stages where sulphur can be removed: in the blast furnace (BF), during hot metal (HM) pretreatment, in the converter …
Read More
Desulfurization unit: Adopting the NaOH spray desulfurization process, the inlet is from the TRT outlet main pipe, and the outlet is connected to the plant gas main. The average removal rate of H2S in the removal unit is >80%, which can meet the flue gas SO 2 concentration <50mg/m 3. The group has air environmental protection design and …
Read More
The achievement of higher sulfur removal rates has been an important goal since the development of sulfur removal techniques. In this research, an effort is made to separately introduce the various processes, industrial practices, and fundamental research activities to remove sulfur from iron ores, concentrates, or roasted iron ores.
Read More
A typical of the high sulfur iron ore from Inner Mongolia, China, iron grade of 53.06% and sulfur content is 2.76%, the main metal mineral in the ore is magnetite, followed by magnetic pyrite ...
Read More
Strategies for heavy oil desulfurization were evaluated by reviewing desulfurization literature and critically assessing the viability of the various methods for heavy oil. The desulfurization methods including variations thereon that are discussed include hydrodesulfurization, extractive desulfurization, oxidative desulfurization, …
Read More
THE elimination of sulphur from iron and the chemical reactions, whereby sulphur, in the presence of powerful basic materials, is removed from crude iron, has recently attracted considerable ...
Read More
Basically, the blast furnace is a countercurrent heat and oxygen exchanger in which rising combustion gas loses most of its heat on the way up, leaving the furnace at a temperature of about 200° C (390° F), while descending …
Read More
Post-combustion flue gas desulfurization and denitrification technologies are essential in achieving the full compliance of fine particulate matter (PM2.5, aerodynamic diameter less than 2.5 μm) air quality standards by 2030 in China as sulfur dioxide (SO2) and nitrogen oxides (NOX) are the main precursors of PM2.5. Some …
Read More
Results showed that when roasting at 650 °C for 120 s, the desulfurization efficiency was up to 76.98%, while the residual sulfur in the roasted ore was found to be 0.07%. HU et al [24] roasted high-sulfur bauxite ore at 600 °C for 60 min, and the dissolution test was performed at 240 °C and roasted for 60 min.
Read More
The deep desulfurization method of sintering flue gas based on the low-temperature oxidation method is studied. Based on the analysis of the main principle of deep desulfurization of sintering flue gas, a deep …
Read More
3.1 Desulfurization mechanism of hot metal with magnesium vapor injection. The changes in the content of magnesium in molten iron at different temperatures are shown in Fig. 2.It can be seen from Fig. 2 that the content of magnesium in molten iron remains about 10 × 10 −6 without change throughout the desulfurization reaction, which …
Read More
