Currently, desulfurization occurs in a process called Hydro-Desulfurization that uses hydrogen gas, high temperatures (300 to 400 degrees Celsius) and high pressures (30 to 130 atmospheres) to modify sulfur bearing compounds so they can be removed. However, this process is limited to large refineries owned by companies such as BP and Shell as ...
Biocatalytic Desulfurization. James G. Speight, Nour Shafik El-Gendy, in Introduction to Petroleum Biotechnology, 2018 2.3 Oxidative Desulfurization. Oxidative desulfurization is an innovative technology that can be used to reduce the cost of producing ultralow sulfur diesel (ULSD) and is a process during which refractory organosulfur compounds are …
A physical model based on similarity principles was built to simulate RH desulfurization process. In order to quantitatively analyze RH desulfurization process, a mathematical model was proposed. By analyzing experimental results with the mathematical model, an empirical formula whose determination coefficient was 0.98 was …
During the desulfurization process of crumb rubber, the effects of desulfurization process variables including desulfurizer type, desulfurizer content, and desulfurization mixing temperature and time were considered, and then the physical properties of modified asphalt were tested. The test results showed that after mixing …
The desulfurization process of conventional spouted bed and spouted beds with intensification structures were simulated and analyzed. The geometric models of four spouted beds and the dimensions of each intensification structure are shown in Fig. 2 and Table 2. Unstructured meshes were selected due to the complex structure of the …
The SulFerox desulfurization process adopts chelated-iron as the catalyst, which lowers iron precipitation, enhances the stability of the iron-based catalyst, and greatly improves desulfurization efficiency. The total iron content in the absorbing liquid ranges from 500 to 1500 μg/L, and the desulfurization liquid system is weakly alkaline ...
Nowadays, photocatalytic oxidative desulfurization process is used with a photocatalyst and light in order to break the sulfur bonds and prevent the creation of dangerous pollutants in the form of oxidation–reduction reactions [15]. In fact, the mentioned method uses sunlight to produce redox or oxidation–reduction reaction.
Desulfurization process by using piezo catalyst. In a Pyrex cell, 50 mg of piezocatalyst was used to oxidative desulfurize the model fuel and 25 mL of model fuel …
Oxidative desulfurization (ODS) has emerged as a prominent technique for the removal of sulfur compounds from fuels, aiming to comply with stringent …
Fig. 5 (a) and (b) illustrates the number grade and total removal efficiencies by the double-alkali desulfurization process as a function of liquid-to-gas ratio (L/G). It can be seen that a few fine particles can be removed by the double-alkali desulfurization process, with a total removal efficiency of 25% while L/G being 3 L/Nm 3.
Due to the most recent environmental requirements, wide desulfurization has become an increasingly important way to obtain ultra-clean fuels for transportation of …
The desulfurization process was a process controlled by the gas film. Various factors had little effect on the desulfurization effect, and the removal rate was …
Three types of adsorptive desulfurization include reactive adsorption, selective adsorption, and π-complexation have been used by zeolites for the removal of sulfur compounds. Thermal and solvent regeneration of zeolites in adsorptive desulfurization process have been discussed in detail.
An integrated and effective method to realize simultaneous desulfurization and denitrification by the Spray Dryer Absorption (SDA) method combined with the NaClO 2 was carried out in this paper. The optimum conditions on desulfurization were verified, as well as the cooperative effect and removal mechanism between SO 2 and NO was …
Fuel gas desulfurization is an important technological step toward achieving environmental neutrality in industrial production. The presence of sulfur compounds in fuel not only significantly increases the rate of corrosion processes, but also increases the amount of sulfur oxides in flue gases. Adsorption technologies are actively used to purify …
The desulfurization process was a process controlled by the gas film. Various factors had little effect on the desulfurization effect, and the removal rate was almost [167]. Y. Jia et al. established a mathematical model of the total sulfite oxidation process of ammonium sulfite and ammonium bisulfite in the ammonia …
The blowing and stirring composite process of molten iron desulfurization process affects the desulfurization efficiency and has obvious advantages in improving steel properties and expanding the scale of converter steelmaking. At present, the injection position of the injection stirring research is fixed, and the desulfurization efficiency …
With an increasing demand for high-quality steel with low sulfur, Kambara Reactor (KR) has gradually become a widely used desulfurization pretreatment process for molten iron in long steelmaking processes, due to its low cost, good dynamic conditions, and high desulfurization efficiency [1, 2].The KR desulfurization process is invented …
What is Desulfurization? Desulfurization is the process of removing sulfur from natural gas (or flue gas desulfurization) to produce "pipeline quality gas" in the case of natural gas, and meet E.P.A. or local air pollution regulations in the case of flue gas. In the natural gas industry, Desulfurization is usually referred to as "H2S Removal."
Desulfurization is the removal of sulfur or sulfur compounds (as from coal or flue gas), mostly from fuels. The most commonly required desulfurization process is in …
In this work, the effect of raw mineral materials with different impurities and their roasting process on the structure and desulfurization performance of slaked lime product was investigated. The structural evolution process from limestone to lime and then to slaked lime was revealed by several characteristic methods (e.g., XRD, SEM, TG, …
Numerous methods have been applied in the desulfurization process including wet scrubbing by means of slurry of alkaline sorbent, commonly lime or limestone, or seawater, spray-dry scrubbing, SNO X desulfurization, etc. Desulfurization efficiency and energy …
Mainly, the oxygen found in the air is used in the deep photocatalytic oxidative desulfurization process as a cost-effective, non-toxic, and environmentally friendly oxidant that can be readily obtained (Fig. 7 a). It is a dependable replacement for hydrogen peroxide and other costly peroxide derivatives. Nonetheless, the exceptional …
Review of adsorptive desulfurization process: Overview of the non-carbonaceous materials, mechanism and synthesis strategies. Saheed A. Ganiyu, Saheed A. Lateef, in Fuel, 2021 2.4 Hydrodesulfurization (HDS). By far the most popular desulfurization method used today is hydrodesulfurization of fuel where the fuel is treated in hydrogen …
Correspondingly, the highest sulfide removal activity is demonstrated with the maximum kinetic parameter; and (3) when the desulfurization process comes to the final decline period, many unfavorable factors (such as accumulating lots of toxic substances in the bacterial body and inhibiting its multiply, lack of nutrient supply, the reduction of ...
Due to the most recent environmental requirements, wide desulfurization has become an increasingly important way to obtain ultra-clean fuels for transportation of less than 15 ppmw of sulfur, such as diesel, gasoline, and jet fuel. as a result of the strict requirements for transportation fuels.
In pervaporation desulfurization, dense and nonporous polymeric membranes separate the sulfur compounds from other hydrocarbons based on their solubility, affinity, and diffusivity [18]. Fig. 5 showed a schematic diagram of the pervaporation desulfurization process. The sulfur compounds in the vapor phase, first …
Flue gas desulfurization (FGD) is the removal process of sulfur dioxide (SO2) from flue gases. Sulfur dioxide in gases is produced by the combustion of fossil fuels and many industrial processes such as …
Residue desulfurization is a high-pressure catalytic hydrotreating process. Chevron Lummus Global, a joint venture between Lummus Technology and Chevron U.S.A., Inc., offers several proven technologies for residuum desulfurization.. CLG's atmospheric residuum desulfurization (RDS) and vacuum residuum desulfurization (VRDS) …
Desulfurization is the process to solidify the sulfur in the coal, thereby preventing the generation of SO 2 during coal combustion [76,77]. Currently, various desulfurization …
Mercury re-emission, because of the reduction of Hg2+ to form Hg0 by sulfite, has become a great concern in the desulfurization process. Lowering the concentrations of Hg2+ and sulfite in the desulfurization slurry can retard the Hg0 formation and, thus, mitigate mercury re-emission. To that end, cobalt-based carbon nanotubes (Co-CNTs) were …
Desulfurization (HDS) is a very important process for upgrading these end products through the use of appropriate catalysts. Essentially, metal sulfide edges catalyze the desulfurization of hydrogen gas under high temperature and pressure conditions.
A pilot plant has demonstrated the feasibility of the process by reducing the sulfur content of coal to a level consistent with current regulations. The Meyers process has been found to be more economical than flue gas desulfurization for retrofitted or intermittently fired boilers smaller than 500 MW and boilers between 10 and 200 MW.
Sulphur removal in the ironmaking and oxygen steelmaking process is reviewed. A sulphur balance is made for the steelmaking process of Tata Steel IJmuiden, the Netherlands. ... 'Mechanism of resulfurization in magnesium desulfurization process of molten iron'. ISIJ Int., 2005, 45,, 1607–1615. doi: 10.2355/isijinternational.45.1607 …
