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Comparison of the Performance of Upflow and Downflow Small .

Comparison of the Performance of Upflow and Downflow Small .

An experimental study for comparing the behavior of a small-reactor in the hydrodesulfurization of straight-run gas oil with two modes of operation, upflow and downflow, is presented. The reactor has 525 mm length and 14.3 mm internal diameter. Experiments were conducted at commercial HDS operating conditions (5.3 MPa total pressure, 356.2 mL/mL hydrogen-to-oil ratio, reaction temperature .

Comparison of the Performance of Upflow and Downflow Small .

Comparison of the Performance of Upflow and Downflow Small .

An experimental study for comparing the behavior of a small-reactor in the hydrodesulfurization of straight-run gas oil with two modes of operation, upflow and downflow, is presented. The reactor has 525 mm length and 14.3 mm internal diameter. Experiments were conducted at commercial HDS operating conditions (5.3 MPa total pressure, 356.2 mL/mL hydrogen-to-oil ratio, reaction temperature .

Hydrotreating catalyst | SIE NEFTEHIM, LLC

Hydrotreating catalyst | SIE NEFTEHIM, LLC

2) by reactor process operation — in the fixed catalyst bed (large majority of commercial units) and in three-phase fluidized bed with periodic replacement of catalyst portions; 3) by process schemes: one-stage, one-run ("once-through"); one-stage with residue recycle; two-stage; with parallel system.

HYDROPROCESSING REACTOR AND PROCESS WITH LIQUID .

HYDROPROCESSING REACTOR AND PROCESS WITH LIQUID .

A feedstock (11) is introduced into a first reaction zone (18) of a reactor system (10) having a plurality of successive reaction zones, each having a hydroprocessing bed therein. Hydrogen gas (14) is introduced into the reactor system for flow through and over the catalyst beds in contact with the liquid in order to react with the feedstock .

ART Hydroprocessing - Resid Hydrotreating - Resid .

ART Hydroprocessing - Resid Hydrotreating - Resid .

ART Hydroprocessing™ (ART), a Chevron and Grace joint venture, is a leading supplier of hydroprocessing catalysts used in production of cleaner fuels. ART offers a complete portfolio of resid hydrotreating, resid hydrocracking, hydrocracking, lubes hydroprocessing and distillate hydrotreating catalyst technologies through a global manufacturing network.

Comparison of Upflow and Downflow Two-Phase Flow Packed .

Comparison of Upflow and Downflow Two-Phase Flow Packed .

This study compares the performance of laboratory trickle-bed and upflow reactors over a range of operating conditions, using the hydrogenation of α-methylstyrene to cumene in hexane solvent over 2.5% Pd on alumina extrudate catalyst as a test reaction. It is shown that the trickle bed performs better than the upflow reactor at low pressures when the reaction is gas limited, due to ready .

Federal Register :: Hazardous Waste Management System .

Federal Register :: Hazardous Waste Management System .

These reactors are designed to process heavy feeds such as atmospheric tower bottoms or vacuum reduced crude and use a single moving-bed catalyst to perform hydrotreating (i.e., metals removal, desulfurization) and hydrocracking functions. Ebullating bed hydroprocessing is a process that takes place in a reactor bed that is not fixed.

Comparison of Quench Systems in Commercial Fixed-Bed .

Comparison of Quench Systems in Commercial Fixed-Bed .

It is a common industrial strategy to place different catalyst beds in series within a reactor in order to optimize catalyst and reactor performance according to the main hydroprocessing goal [136 .

Hydrocracking of Heavy Oil and Residua

Hydrocracking of Heavy Oil and Residua

hydrotreating of the hydrocracked gas oil and lighter products to produce SCO. The first process hydrocracks vacuum residue in ebullated bed reactors in a single stage without heavy oil recycle. Bitumen derived naphtha and gas oils from the crude unit are also charged to the single stage hydrotreating section of this plant.

Way delayed coking - Patent search, search patents and .

Way delayed coking - Patent search, search patents and .

After the filter 30 GSMI passes through the installation of 32 for Hydrotreating, and then is fed to the installation of 34 for cracking fluidized bed of catalyst. As you install the 32 for Hydrotreating you can use either hydraulic desulfator or installation for hydrocracking, which must have a fixed catalyst bed.

Residue Hydrocracking Solutions For Refinery Sustainability

Residue Hydrocracking Solutions For Refinery Sustainability

Upflow Reactor Low pressure drop Recycle pump backmixes and expands single catalyst bed . Hydrotreating Reactor Hydrogen Make-up Gas Cooling Purification & Compression Heavy Oil Fractionation GO . They now operate with a dual solid catalyst system.

Fixed Bed Reactor - an overview | ScienceDirect Topics

Fixed Bed Reactor - an overview | ScienceDirect Topics

Using a fluidized bed reactor (Fig. 6.3) resolves some of the problems faced with a fixed bed reactor.This particular reactor offers a much more enhanced mass and heat transfer and minimizes temperature gradients throughout the reactor [64].The mass and heat transfer are improved due to better mixing of the catalyst with the fluid, which provides a greater surface area for the reaction to occur.

Hydrocracking of Heavy Oil and Residua

Hydrocracking of Heavy Oil and Residua

hydrotreating of the hydrocracked gas oil and lighter products to produce SCO. The first process hydrocracks vacuum residue in ebullated bed reactors in a single stage without heavy oil recycle. Bitumen derived naphtha and gas oils from the crude unit are also charged to the single stage hydrotreating section of this plant.

Trickle Bed Reactor - an overview | ScienceDirect Topics

Trickle Bed Reactor - an overview | ScienceDirect Topics

Shaofen Li, in Reaction Engineering, 2017. 9.4.1 Introduction. Trickle bed reactors are similar to fixed bed reactors for the catalytic gas–solid reactions discussed in the previous chapter—the major difference is that a single phase fluid flows in the latter whereas the fluid flows in two phases (gas and liquid) in the former. Obviously, the situation in the two-phase flow is more .

Texaco T-STAR Process for ebullated bed hydrotreating .

Texaco T-STAR Process for ebullated bed hydrotreating .

Texaco Fuels and Lubricants Research recently completed a successful pilot plant program demonstrating the use of the T-STAR{reg_sign} process for mild hydrocracking of blends of low value feedstocks (cycle oils, coker gas oils), distillates and vacuum gas oils to generate high quality diesel and improved quality FCC feed.

Fixed Bed Reactor - an overview | ScienceDirect Topics

Fixed Bed Reactor - an overview | ScienceDirect Topics

Using a fluidized bed reactor (Fig. 6.3) resolves some of the problems faced with a fixed bed reactor.This particular reactor offers a much more enhanced mass and heat transfer and minimizes temperature gradients throughout the reactor [64].The mass and heat transfer are improved due to better mixing of the catalyst with the fluid, which provides a greater surface area for the reaction to occur.

Comparison of Quench Systems in Commercial Fixed-Bed .

Comparison of Quench Systems in Commercial Fixed-Bed .

It is a common industrial strategy to place different catalyst beds in series within a reactor in order to optimize catalyst and reactor performance according to the main hydroprocessing goal [136 .

Hydrotreating - an overview | ScienceDirect Topics

Hydrotreating - an overview | ScienceDirect Topics

The main features of this process are its dual catalyst system and its fixed-bed swing-reactor concept. The first catalyst has a high capacity for metals (to w/w of new catalyst) and is used for both hydrodemetallization (HDM) and most of the conversion.

Catalytic hydrotreating process (Patent) | DOE Patents

Catalytic hydrotreating process (Patent) | DOE Patents

DOE Patents Patent: Catalytic hydrotreating process . containing a deep bed of fluidized catalyst particles is utilized to accept particles of biomass or other oxygenated feedstocks that are significantly smaller than the particles of catalyst in the fluidized bed. The reactor features an insert or other structure disposed within the reactor .

Performance Evaluation of Hydroprocessing CatalystsA .

Performance Evaluation of Hydroprocessing CatalystsA .

Apr 06, 2002 · The selection of an appropriate reactor for hydroprocessing catalysis research primarily depends on the type of information to be generated, the reliability and reproducibility of the information required, and the cost involved to generate such information. In this article, the various reactors and approaches that have been used at different stages of hydroprocessing catalysis research and .

Trickle-bed reactors (Journal Article) | OSTI.GOV

Trickle-bed reactors (Journal Article) | OSTI.GOV

@article{osti_5541696, title = {Trickle-bed reactors}, author = {Ng, K.M. and Chu, C.F.}, abstractNote = {Trickle-bed reactors can be defined as a fixed bed of catalyst particles, contacted by a gas-liquid, two-phase flow. The flow may be cocurrent (downflow or upflow) or countercurrent. In this article, we will focus on cocurrent downflow, which, because of its relatively lower pressure drop .

Performance Testing of Hydrodesulfurization Catalysts .

Performance Testing of Hydrodesulfurization Catalysts .

The bench-scale reactor was operated in up-flow mode and consisted of a reactor with an internal diameter of 20mm and a catalyst-bed volume of 225mL. The catalyst was tested as whole extrudates and was diluted with inert material. The tem-perature of the catalyst bed was measured by using multiple thermocouples inside the catalyst bed.

Catalyst handling best practice guide

Catalyst handling best practice guide

4.0 Catalyst reactors 4.1 Fixed bed reactor This is the most common type and is typically a cylindrical vessel filled with catalyst pellets with the gas or liquid reactants flowing down-flow through the bed and being converted into products. The reactor may have

Upflow versus downflow testing of hydrotreating catalysts .

Upflow versus downflow testing of hydrotreating catalysts .

Jan 01, 1988 · Schematic diagram of the applied reactor system. 10 ml inert carborundum beads diameter 2 mm 75 ml catalyst + 75 ml diluent (carburundum, diameter 0.5 mm) t bed lenoth 45 cm -J 10 ml inert carborundum beads diameter 2 mm 243 diameter 21 mm Fig. 4. Detailed dimensions of the reactor tubes and the catalyst bed.

UPFLOW FIXED BED REACTOR WITH PACKING ELEMENTS - Patent .

UPFLOW FIXED BED REACTOR WITH PACKING ELEMENTS - Patent .

A reactor system for conducting chemical reactions is presented in which a reactor (4) is operated in an upflow mode with a fixed bed catalyst (25) and randomly distributed reactor packing therein (24).

Patents Assigned to UOP - Justia Patents Search

Patents Assigned to UOP - Justia Patents Search

Abstract: The invention involves a scale collection device that is located within downflow reactor head for removing solids from feed streams to increase reactor operating cycle time without impact on effective reactor space for catalyst loading. More particularly, a filtering zone is located in an upper portion of a reactor vessel above a rough liquid distribution tray and a distribution tray.

Upflow versus downflow testing of hydrotreating catalysts .

Upflow versus downflow testing of hydrotreating catalysts .

Jan 01, 1988 · Schematic diagram of the applied reactor system. 10 ml inert carborundum beads diameter 2 mm 75 ml catalyst + 75 ml diluent (carburundum, diameter 0.5 mm) t bed lenoth 45 cm -J 10 ml inert carborundum beads diameter 2 mm 243 diameter 21 mm Fig. 4. Detailed dimensions of the reactor tubes and the catalyst bed.

Catalyst regeneration by circulating . - Free Patents Online

Catalyst regeneration by circulating . - Free Patents Online

Feb 14, 1978 · Both were loaded with a catalyst with a bulk density of 0.67 kg/l comprising 4 p.b.w. of nickel and 11 p.b.w. of molybdenum on 100 p.b.w. of alumina as a support. Both reactors contained a moving fixed bed of catalyst and the catalyst flow from and to each reactor via lines 5 .

Upflow versus downflow testing of hydrotreating catalysts .

Upflow versus downflow testing of hydrotreating catalysts .

Jan 01, 1988 · Schematic diagram of the applied reactor system. 10 ml inert carborundum beads diameter 2 mm 75 ml catalyst + 75 ml diluent (carburundum, diameter 0.5 mm) t bed lenoth 45 cm -J 10 ml inert carborundum beads diameter 2 mm 243 diameter 21 mm Fig. 4. Detailed dimensions of the reactor tubes and the catalyst bed.

A continuous diethanolamine dehydrogenation fixed bed .

A continuous diethanolamine dehydrogenation fixed bed .

Oct 15, 2015 · We have developed a fixed bed Cu/Co/ZrO 2 catalyst and reactor system for the production of disodiumiminodiacetic acid by dehydrogenation of diethanolamine. This process can give high molar yields (>98%) in a series of adiabatic reactors with interstage heating.