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Preparation and Desulfurization Behavior of Zinc Oxide .

Abstract: Zinc oxide based moderate-temperature sorbents were obtained by mixing active zinc oxide with other additives, shaping, drying and calcinating in a given order. The influences of preparation conditions on the desulfurization behaviors for the prepared ZnO based desulfurization sorbent were carried out in simulated coal gas using a fixed-bed reactor.

Simultaneous biological nitrification and desulfurization .

Nov 17, 2019 · Simultaneous biological nitrification and desulfurization treatment of ammonium and sulfide-rich wastewater: Effectiveness of a sequential batch operation. Sekine M(1), Akizuki S(2), Kishi M(3), Kurosawa N(4), Toda T(5).

Claus process - Wikipedia

The Claus process is the most significant gas desulfurizing process, recovering elemental sulfur from gaseous hydrogen sulfide.First patented in 1883 by the chemist Carl Friedrich Claus, the Claus process has become the industry standard.C. F. Claus was born in Kassel in the German State of Hessen in 1827, and studied chemistry in Marburg before he emigrated to England in 1852.

Catalytic Oxidative Desulfurization: A Comparison of Reactors

A novel technology, a pulsed oscillating monolith reactor (POMR), was compared to a standard autoclave reactor for oxidative desulfurization (ODS) of a model diesel fuel. Two classes of catalysts, mesoporous Ti-MCM-41 and Pd on carbon, were used for ODS. The oxidants used were O 2 and peroxide. The model diesel compound was 75 wt% alkanes, 24

Effect of solids concentration distribution on the flue .

Various flue gas desulfurization (FGD) processes have been developed to reduce SO{sub 2} emissions from coal-fired power plants. The wall deposition of droplets is an important issue affecting the desulfurization efficiency and operating stability of semidry flue gas desulfurization (FGD) reactors.

Deep desulfurization of natural gas by a commercial ZnO .

The desulfurization reactor contains an adsorbent bed of zinc oxide, providing the primary source of sulfur capture from the feed gas. The amount of hydrogen sulfide at the reactor outlet must be less than 0.1 ppm. In order to ensure continuous operation of the unit, two parallel reactors have been utilized. .

Desulfurization of heavy oil - Springer

Desulfurization of heavy oil . 2 to a fixed-bed reactor packed with an appro-priate HDS catalyst. The standard HDS catalysts are NiMo/ Al 2O 3 and CoMo/Al 2O 3, but there are many more types available. During HDS, the sulfur in the organosulfur compounds is converted to H 2S.

Eulerian–Eulerian Numerical Study of the Flue Gas .

This paper represents the desulfurization of gas mixts. by chem. sorption of SO2 on porous granular CaO particles in the reactor at ambient temp. The advantages of the multi-stage fluidized bed reactor are of high mass transfer and high gas-solid residence time that can enhance the removal of acid gas at low temp. by dry method.

Design Parameters for a Hydro desulfurization (HDS) Unit .

proper reactor inlet temperature. Most hydro-treating reactions are carried out below 800 °F (427 °C) to minimize cracking, and the feed is usually heated to between 500 and 800 °F (260 and 427 °C). The oil feed combined with the hydrogen-rich gas enters the top of the fixed-bed reactor.

Desulfurization Reaction - an overview | ScienceDirect Topics

Jul 02, 2011 · Kinetics of desulfurization has been examined more profoundly elsewhere (Chapter 1.3) and therefore only briefly discussed here.Concerning direct desulfurization reactions like Ca-wire injection into ladle, the desulfurization rate is strongly influenced by the feeding rate, stirring pattern, and equal distribution of calcium inside the steel bath. . Principally, it is a transitory system as .

Trickle‐bed reactor model for desulfurization and .

Apr 16, 2004 · Desulfurization and hydrogenation of aromatics in diesel oil were investigated in an isothermally operated trickle‐bed reactor 500 mm long and with a 19‐mm ID, using commercial bifunctional NiMo/Al 2 O 3 catalysts. The operating temperature, pressure, liquid hourly space velocity, gas/oil ratio, and the initial concentration of H 2 S were 300–380°C, 2–8 MPa, 1–4 h −1, 100–500 m .

Hydrotreating Process - Hassan ElBanhawi

The degree to which sulfur can be removed from the hydrocarbon varies from near-complete desulfurization for light straight-run naphthas to 50 to 70 percent for heavier residual materials. The desulfurization reaction results in the production of hydrogen sulfide (H2S) in the reactor .

Desulfurization - an overview | ScienceDirect Topics

The desulfurization activity in this study is reported as the breakthrough curves of the desulfurization reaction (C/C 0 vs. t) where C is the outlet concentration of SO 2 (ppm) from the reactor, C G is the initial feed concentration of SO 2 (ppm) and t is the reaction time (min).

Desulfurization performance of sulfur dioxide and product .

Different surface-active agents were used for studies of performance of the foam-bed reactor for the desulfurization operation. With the bubble column reactor, the maximum value of the transient SO2 removal efficiency obtained was 99.4% with hydrated lime slurry, while with the use of calcium carbonate slurry this value was 97.7%.

Residue Desulfurization - MDR

Residue desulfurization is a high-pressure catalytic hydrotreating process. Chevron Lummus Global, a joint venture between McDermott's 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) technologies produce low sulfur fuel oil or feedstock .

Flue Gas Desulphuriation Using Jet Bubbling Reactor

The type of reactor used most widely in wet desulphurization is wet scrubber unit (Fig. 2) Figure 2 . Washer fluid is sprayed through several nozzles, made of corrosion resistant material. There are desulfurization solutions using the jet bubbling reactor (JBR) (Fig. 3) Figure 3 . 2.2 Mass transfer with chemical reaction in gas-liquid surface

Desulfurization of calcium sulfate in a multiple zone reactor

73-25,257 SWIFT, William Morton, 1942-DESULFURIZATION OF CALCIUM SULFATE IN A MULTIPLE ZONE REACTOR. Iowa State IMiversity, Ph.D., 1973 Engineering, chesnical

Effects of Lead and Mercury on Sulfate-Reducing Bacterial .

A laboratory-scale SrUASB reactor for the laboratory-scale flue gas desulfurization-sulfite reduction process, and an autotrophic denitrification and nitrification integrated (FGD-SANI) system 9 were used in this work, as shown in Fig. S4. The inner diameter and height of the SrUASB reactor were 45 mm and 750 mm, respectively, resulting in 1.08 .

Catalytic effect of Mn2+, Fe3+ and Mg2+ ions on .

Wet phosphate rock flue gas desulfurization is a new and promising technology, which has drawn increasing attention in recent years. The effect of Mn 2+, Fe 3+ and Mg 2+ dissolved from phosphate rock on removal efficiency of SO 2 were systematically investigated in this paper. The XRD, FT-IR, SEM, XPS, IC and ICP were used to characterize the reacted products, demonstrating that these metal .

Desulfurization of coal (Patent) | OSTI.GOV

Abstract. A system for desulfurization of sulfur-containing coal comprises apparatus for comminuting sulfur-containing coal, a gas/solid reactor having an inlet and an outlet, a connection or conduit for supplying the comminuted sulfur-containing coal to the reactor inlet, and an oxidant gas generator constructed in accordance with U.S. Pat. No. 4,248,681 connected to supply an oxidant gas to .

Desulfurization Unit - Zinc Oxide Design Equations .

Nov 14, 2017 · Desulfurization Unit - Zinc Oxide Design Equations - posted in Student: Hi, Ive been tasked with designing every aspect of a natural gas desulfurization unit which will use zinc oxide as a the sorbent (or reactant) in a fixed bed. Im struggling to find a place to start in relation to reactor design equations. Im unsure if packed bed reactor equations apply to this situation, given that the .

Preparation and Desulfurization Behavior of Zinc Oxide .

Abstract: Zinc oxide based moderate-temperature sorbents were obtained by mixing active zinc oxide with other additives, shaping, drying and calcinating in a given order. The influences of preparation conditions on the desulfurization behaviors for the prepared ZnO based desulfurization sorbent were carried out in simulated coal gas using a fixed-bed reactor.

Flue Gas Desulfurization

Flue Gas Desulfurization Project. Design, configure and provide start-up support for a control system using Rockwell ControlLogix, Siemens APACS, and Wonderware InTouch to control a flue gas desulfurization system at a coal fired power plant. Architecture. Desulfurization reactor and support systems including carbon injection, lime storage,

Desulfurization of Kerosene by the Electrochemical .

Evaluation of the membrane efficiency of both Nafion and sulfonated poly (ether ether ketone) using electrochemical membrane reactor toward desulfurization of a model diesel fuel. Chemical Engineering Research and Design 2020, 153, 517-527. DOI: 10.1016/j.cherd.2019.11.007.

Design Parameters for a Hydro desulfurization (HDS) Unit .

proper reactor inlet temperature. Most hydro-treating reactions are carried out below 800 °F (427 °C) to minimize cracking, and the feed is usually heated to between 500 and 800 °F (260 and 427 °C). The oil feed combined with the hydrogen-rich gas enters the top of the fixed-bed reactor.

Desulfurization of natural gas feedstock.pptx | Zinc Oxide .

Conclusion Purpose of desulfurization: Remove sulfur which acts as poison to the catalyst Reactant: ZnO Main equation: H2S + ZnO ZnS + H2O Design Criteria: Reactor: Packed Bed Operating 180 400 Temperature (oC): Operating Pressure (MPa) 4

(PDF) Characterization and Valorization of Kanbara Reactor .

Kambara reactor desulfurization slag (KR slag) is a solid waste generated from the desulfurization process of molten iron by a KR mechanical stirring process in a steel factory. Most of the KR .

Supercritical Water Desulfurization of Organic Sulfides Is .

Supercritical water desulfurization (SCWDS) has potential as a technique for removing sulfur from feedstocks such as heavy oil and bitumen. However, a fundamental understanding of SCWDS (such as the underlying chemical mechanisms, relative rates of desulfurization, and the role of SCW and hydrocarbons) is limited. In the present work, we have gained molecular-level insights into this process .

Desulfurization of Syngas in a Transport Reactor

Download Citation | Desulfurization of Syngas in a Transport Reactor | During gasification, sulfur present in carbonaceous materials is converted into reduced sulfur species, such as H2S and COS.

Flue-gas desulfurization - Wikipedia

A new, emerging flue gas desulfurization technology has been described by the IAEA. It is a radiation technology where an intense beam of electrons is fired into the flue gas at the same time as ammonia is added to the gas. The Chendu power plant in China started up such a flue gas desulfurization unit on a 100 MW scale in 1998.