1. In a process for desulfurizing non-weathered sulfur-bearing raw coal by contacting it with perchloroethylene to dissolve the sulfur in said non-weathered raw coal, the improvement providing even greater organic sulfur removal comprising the step of subjecting said non-weathered raw coal to an elevated temperature of about 122° F. to about 230° F. at …

 · Low-temperature flue gas concentration process, one of the concentrating techniques of desulfurization wastewater, adopts flue gas after the electric precipitator …

 · The optimum parameters such as reaction temperature, reaction time, H 2 O 2 (50 w / w %), and carboxylic acid dosage for oxidative desulfurization were determined to be 95 °C, 6 h, 10 mL, and 0.6 g, respectively. The conversion of refractory sulfur compounds into extractable sulfone forms was verified using gas chromatography.

dynamic data of the desulfurization by magnesium vapor, they deduced the solubility product of magnesium and sul-fur in the molten iron as [ppmMg]·[ppmS] 180. Zhang et al.12) investigated the dissolution equilibrium of magnesium vapor in liquid iron in a two-temperature zone furnace using the vapor pressure method. At 1873K, they conclud-

Biocatalytic desulfurization (biodesulfurization) is the one of the most promising technologies as it operates at ambient temperature and pressure with high selectivity, resulting in …

 · The reason is that high temperatures are not beneficial for sulfur removal because they negatively affect the catalytic oxidative and extraction processes. Thus, desulfurization is hindered at high temperatures since PMS is unstable and decomposes at temperatures as low as 65°C. PMS loses its oxidative capacity above 60°C.

TY - JOUR. T1 - New physical process for desulfurization of low-rank coals. AU - Çelik, M. S. AU - Yildirim, I. PY - 2000/10. Y1 - 2000/10. N2 - A processing route involving low temperature carbonization followed by dry magnetic separation is put forward for the desulfurization and deashing of typical low-rank lignitic coals.

The current industrial method for removal of sulfurfrom fuelsis hydrodesulfurization (HDS), which is a high temperature, high pressure catalyticprocess. This makes HDS a very costly option for deep …

 · Hydrodesulfurization, which uses chemical catalysts at a high temperature and pressure to remove sulfur is the most commonly used method in the petroleum industry to reduce sulfur content of crude oil. 2. Adsorptive desulfurization. Adsorptive desulfurization is a process where a solid sorbent adsorbs organosulfur compounds from oil.

With the increasingly prominent global energy and environmental problems, more and more enterprises have been required to desulfurize the exhausted gases. Different enterprises have different demands for the desulfurization process, thus the choice of desulfurization process methods has become a focus of attention. Since the evaluation of the …

 · Diagram of the experimental system for ammonia-based desulfurization. In this work, experiments were conducted at solution pH level of 5.0–6.0, the gas flow rate ranging from 1.92 to 2.6 m s −1, and the liquid-to-gas ratio was between 3 and 5.5 L m −3. The pH of liquid sampled from the sampling port was monitored by pH meter (HANNA, HI198128).

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 gasoline refining as well as cement, paper, glass, steel, iron and copper production. Flue Gas Desulfurization (FGD) System Description

The nanoparticle formation over MOF microrods is delocalized in the temperature range of 70–200 °C. These nanoparticles (2.5–2.8 nm) serve as the seed for the formation of ∼10 nm sized nanoparticles at 280 °C, which further grow to large sized nanoparticles (100–250 nm) at 550 °C. Figure 1 Figure 1.

 · Subnano MoO 3 /MCM-41 was successfully prepared through doping (NH 4) 6 Mo 7 O 24 in the synthesis process of MCM-41. The morphology of MoO 3 /MCM-41 was visually observed by TEM and HADDF-STEM. N 2 sorption, XPS and Raman were further applied to investigate the structure of the material. MoO 3 /MCM-41 was used in the …

 · However solubility of sulfur in solid iron is limited: 0.002% in α-iron at room temperature and 0.013% in γ-iron at 1832°F (1000°C). ... Desulfurization may be effectively conducted in the reducing slag stage of the steel making process in Electric-arc ... Deep desulfurization by injection of active agents are achieved due to the following ...

 · WDP is capable of removing up to 99.9 percent of the total sulfur contaminants directly from raw syngas at gasifier pressure and warm process temperature (250–650°C).

A regenerative process based on using carbon in coal ashes for lime regeneration has been studied. Ten sulfation/regeneration cycles using Greer limestone have been conducted in a TG system and there was no sign of weakening of the SO/sub 2/ sorption activity. Work on the regenerative process based on silicates is being continued. For pure silicates, the …

 · WDP is capable of removing up to 99.9 percent of the total sulfur contaminants directly from raw syngas at gasifier pressure and warm process temperature …

 · The results showed that the desulfurization rate of FCC gasoline reached about 85% under the conditions of 0.5 h-1 air velocity, 35°C adsorbent bed temperature, 700°C adsorbent roasting temperature and 4 h roasting time.

 · It was found that the optimal operating parameters for the flue gas desulfurization system of this plant could be characterized by a flue gas temperature of 90–93 °C, a pH …

The desulfurizer before and after desulfurization was characterized by... Desulfurization Process and Kinetics of Fe/Activated Carbon Removal of H2S at Low Temperature - Zhang - 2020 - ChemistrySelect - Wiley Online Library

this patent describes a continuous process for the production of desulfurized synthesis gas, fuel gas, or reducing gas comprising: (1) reacting sulfur-containing heavy liquid hydrocarbonaceous fuel and/or sulfur-containing solid carbonaceous fuel by partial oxidation with as free-oxygen containing gas and in the presence of a temperature …

 · Compared to H 2 O 2, TBHP is a kind of oil-soluble oxidant, so no subsequent separatory process is needed when using TBHP as the oxidant of ODS. 6 TBHP is thermodynamically stable below 80 °C, so most experiments are tested at 50–80 °C 5,7–13 for keeping acceptable catalytic activity.

Abstract High temperature desulfurization is now possible using newly developed metal oxide sorbents which are capable of reducing the H {sub 2}S concentration to less than 10 ppmv from a laboratory scale fixed-bed reactor using a simulated coal gas.

 · The sulfide block the pores, causing the specific surface area, pore volume and fractal dimension to decrease after desulfurization. The effects of gas flow rate, particle …

 · The coal hydrogen production process requires high-temperature steam as a reactant. Coal-fired boilers are usually used to provide high-temperature steam. The ammonia-based desulphurization process is an effective technology to remove SO2 in the coal-fired flue gas. However, the mass transfer coefficient of SO2 in such an engineered …

 · The lateritic soils collected from a tea garden were used to explore the regeneration process using different O 2 contents for high-temperature desulfurization. The desulfurization and regeneration experiments were carried out using a fixed-bed reactor at 500°C and the gaseous mixture composed of 1% H 2 S, 25% CO, 15% …

 · The analysis conditions were as follows: the injector temperature was 340 °C, the detector temperature was 250 °C, and the column temperature was programmed …

The low-temperature desulfurization catalyst according to claim 3, wherein the carbonization temperature in step (1) is 550-650 ℃ and the activation temperature is 800-950 ℃. 5. The...