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Valves enhance fluidized-bed polymerization: Part 2 .

Valves enhance fluidized-bed polymerization: Part 2 .

Valves play a central role in the product discharge system, and proper valve performance is critical in the discharge line(s) including the product chamber(s). The valve should be able to withstand a high-cycling rate, which could be over 200 000 or even 400 000 cycles per year.

High borosilicate glass packed bed reactor with stainless .

High borosilicate glass packed bed reactor with stainless .

The packed bed reactor has been widely used in chemical reaction, combination, separation and concentration. Different heating or cooling liquids, such as water or oil, can be injected in the interlayer of 1L lab glass reactor for providing a constant temperature for reactions. . PTFE Bottom Discharge Valve. working temp range-60 to 200°C .

A packed bed Ammonia Fiber Expansion reactor system for .

A packed bed Ammonia Fiber Expansion reactor system for .

Packed bed AFEX system. The packed bed AFEX reactor system was assembled on a portable skid, which supported three bed tubes (Supplementary Figure 1).Dimensions and ports of the three bed tubes are shown Supplementary Figure 2.In normal operation, the bed tubes were mounted vertically, with the inlet at the top and exit at the bottom; however, to investigate buoyancy effects during steam .

Fluidized Packed Bed Double Walled Cylindrical Glass .

Fluidized Packed Bed Double Walled Cylindrical Glass .

Double layers Jacketed Glass Reactor is designed for controlling temperature of its reaction contents, by using a cooling or heating "jacket" around the vessel where the cooling or heating fluid is circulated among, under normal or negative pressure. Hawach offer a wide range of glass reactors with volumes from 1 L to 200L. It is offen connected with circulating water vacuum pump, diaphragm .

Thermochemical Heat Storage Performance in the Gas/Liquid .

Thermochemical Heat Storage Performance in the Gas/Liquid .

Thermochemical heat storage is a promising technology for improving energy efficiency through the utilization of low-grade waste heat. The formation of a SrCl 2 ammine complex was selected as the reaction system for the purpose of this study. Discharge characteristics were evaluated in a packed bed reactor for both the gas-solid reaction and the liquid-solid reaction.

Pressure Relief Valves - Parr Instrument Company

Pressure Relief Valves - Parr Instrument Company

Spring-loaded relief valves should be viewed as supplements and not substitutes for a safety rupture disc. The rupture disc is the primary means for protection of the operator and the vessel in case of accidental over-pressure. Spring-loaded relief valves can be added to a reactor or vessel to: Relieve pressures near the maximum operating pressure. [.]

WABT - weighted average bed temperature

WABT - weighted average bed temperature

WABT - Weighted Average Bed Temperature is a way to get one representative temperature from an adiabatic reactor (no heat loss or gain to the surroundings), which in reality have an increasing or decreasing temperature profile from inlet to outlet. The temperature profile occurs due to exothermic or endothermic reactions taking place in the reactor. The WABT is used to indicate the catalyst .

Process Improvement to Biomass Pretreatment for Fuels and .

Process Improvement to Biomass Pretreatment for Fuels and .

• Scale up packed bed reactor by factor of 50 • Compare performance with benchmarks • Meet the following critical success factors: . Valve skid: • Valves – • 60 total, 20 actuated . Suction 0, discharge .

US6255411B1 - Reactor product discharge system - Google .

US6255411B1 - Reactor product discharge system - Google .

A process is disclosed for removing particulate product from a fluidized bed reactor to optimize, within the constraints of the product removal cycle, conservation of gas in which the product is entrained. Data are compiled on the time required for equalizing pressure between product discharge tanks, and these data are used to determine the optimum times for various valves to be open.

Fixed bed reactor assembly having a guard catalyst bed .

Fixed bed reactor assembly having a guard catalyst bed .

Mar 09, 1999 · In the substantially packed-bed type reactor system of Stangeland et al., when catalyst is withdrawn from the reactor during normal catalyst replacement, the catalyst flows in a downwardly direction under essentially plug flow or in an essentially plug flow fashion, with a minimum of mixing with catalyst in layers which are adjacent either .

Control Valve Sourcebook — Chemical Process Overview

Control Valve Sourcebook — Chemical Process Overview

The fixed bed reactors are packed with solid catalyst and as reactant passes through the catalyst, reaction takes place. The fluidized bed reactor consists of plates with catalyst. These catalyst particles behave like fluid as gas flows through it. Refer to Figure 3 for a representation of fixed bed and a fluidized bed reactor.

A Novel Plasma Rotating Packed Bed Reactor: Effects of .

A Novel Plasma Rotating Packed Bed Reactor: Effects of .

 A novel plasma rotating packed bed reactor has been developed.  Centrifugal force improves the uniformity of discharge by the formation of liquid film.  Liquid film was stretched by the centrifugal force in order to enhance the mass transfer. 1.

High borosilicate glass packed bed reactor with stainless .

High borosilicate glass packed bed reactor with stainless .

The packed bed reactor has been widely used in chemical reaction, combination, separation and concentration. Different heating or cooling liquids, such as water or oil, can be injected in the interlayer of 1L lab glass reactor for providing a constant temperature for reactions. . PTFE Bottom Discharge Valve. working temp range-60 to 200°C .

The Pressure Relief System Design for Industrial Reactors

The Pressure Relief System Design for Industrial Reactors

A quick and simple approach for reactor—emergency relief system design—for runaway chemical reactions is presented. A cookbook for system sizing with all main characteristic dimensions and parameters is shown on one realistic example from process industry. System design was done based on existing theories, standards, and correlations obtained from the literature, which were implemented for .

Effect of packing materials on the decomposition of .

Effect of packing materials on the decomposition of .

Nov 26, 2013 · The performance of 1,1,1,2-tetrafluoroethane or HFC-134a decomposition and the formation of byproducts in a dielectric barrier discharge plasma reactor were studied with different packing systems such as α-Al2O3 (porous and nonporous), γ-Al2O3 (porous) and ZrO2 (nonporous). Experimental variables such as reactor temperature, initial HFC-134a concentration and oxygen .

US7763685B2 - Method of discharging a polymer from a .

US7763685B2 - Method of discharging a polymer from a .

A method of discharging polymer from a continuously operated polymerization reactor, wherein at least a monomer is polymerized to form polymer particles, the method comprising adjusting the discharge rate of the polymer particles by means of a piston valve having a piston element connected to an actuator, said actuator being able to modulate the piston stroke inside said piston valve.

Removal of Ethylene and By-Products Using Packed Bed .

Removal of Ethylene and By-Products Using Packed Bed .

Abstract Ethylene gas was decomposed using packed-bed type dielectric barrier discharge (PBDBD) plasma reactor to keep freshness of fruits. The ethylene gas was diluted with gas mixture of nitrogen, oxygen, and carbon dioxide as simulated gas in the transportation container.

(354f) Residence Time Distribution in a Packed Bed .

(354f) Residence Time Distribution in a Packed Bed .

The packed bed consists of a 30 mm long channel filled with catalyst particles with mean diameters of 100 - 120 μm. Fluorescence microscopy is used to observe the broadening of a sample pulse. Rhodamine B tracer is injected with a HPLC valve and an ?on-chip? method [1] into the reactor and recorded with a CCD camera.

Ready for the challenge: Valves enhance fluidised-bed .

Ready for the challenge: Valves enhance fluidised-bed .

Challenges for valves Valves should be able to withstand a high cycling rate, with a range from 200 000 to 1 million cycles yearly, depending on the type of reactor and discharge piping. Meanwhile, in most applications, a fast cycle time of less than 2 - 3 sec is required. Therefore, high cycle design and construction of both the valve and the .

Results - PSRI

Results - PSRI

Developed new reactor designs and new conical reactor distributors for a client Designed and developed L-valve feeding systems for TiO2 ores and coke for two PSRI member companies Designed a Restricted Pipe Discharge System (RPDS) to continuously discharge solids from a chlorinator bed to prevent excessive buildup of impurities Determined .

Zero-dimensional modelling of unpacked and packed bed .

Zero-dimensional modelling of unpacked and packed bed .

0D chemical kinetics modelling, global modelling, filamentary plasma, micro-discharges, packed bed reactors, vibrational kinetics, ammonia synthesis 1. Introduction Ammonia (NH 3) is an important chemical for the manufacturing of various products and is especially crucial in the food industry through its role in fertilizer production [1].

Transient Barrier Discharge Characteristics of Parallel .

Transient Barrier Discharge Characteristics of Parallel .

Summary: Barrier discharge has been used for ozone generation for water treatments and pollutant gas removal. An experiment has been conducted to observe transient barrier discharge characteristics of parallel‐plate‐type, 3 mm diameter, spherical glass beads packed‐bed, non‐thermal plasma reactors under high‐humidity conditions.

Using dielectric barrier discharge and rotating packed bed .

Using dielectric barrier discharge and rotating packed bed .

DBD and RPB are two main reactors in this study. As shown in Fig. 1, the coaxial DBD reactor consisted of stainless-steel tube as the inner electrode, quartz tube as the dielectric, and a metal mesh wrapped around the quartz tube as the outer electrode.The discharge gap was 3.5 mm and the length of the reactor was 150 mm. NTP was obtained in this DBD reactor with sinusoidal high voltage power .

PRV for high pressure H2 recycle loop - Safety Relief .

PRV for high pressure H2 recycle loop - Safety Relief .

Oct 16, 2006 · There are no block valves in the main process stream, but there is a huge packed bed reactor vessel and several heat exchangers. I have little confidence in anyone's ability to predict pressure drop for 2-phase flow though a packed bed with absolute precision.

Packed Bed Tower Scrubbers - Tri-Mer

Packed Bed Tower Scrubbers - Tri-Mer

Packed Bed Tower Scrubbers • for gaseous emissions - NOx, Cl2, SO2, others • acid fumes, including H2SO4, HCI, HNO3, and HF • odor control – single and multi-stage units • combination systems for hot and cold gases • Systems can incorporate particulate control, gas .

Dry Reforming of Methane with Dielectric Barrier Discharge .

Dry Reforming of Methane with Dielectric Barrier Discharge .

A hybrid plasma catalytic system consisting of a dielectric barrier discharge (DBD) reactor and relaxor ferroelectrics is investigated for syngas generation via the carbon dioxide reforming of methane. The study tests three kinds of packing materials, including two relaxor ferroelectrics BaZr0.75T0.25O3 (BZT; εr = 149), BaFe0.5Nb0.5O3 (BFN; εr = 2025), and glass beads (εr = 3–5).

Zero-dimensional modelling of unpacked and packed bed .

Zero-dimensional modelling of unpacked and packed bed .

0D chemical kinetics modelling, global modelling, filamentary plasma, micro-discharges, packed bed reactors, vibrational kinetics, ammonia synthesis 1. Introduction Ammonia (NH 3) is an important chemical for the manufacturing of various products and is especially crucial in the food industry through its role in fertilizer production [1].

Packed Tower - an overview | ScienceDirect Topics

Packed Tower - an overview | ScienceDirect Topics

The packed tower is a well-established application of immobilized (fixed film) cells. A vertical cylindrical column is packed with pieces of some relatively inert material, for example, wood shavings, twigs, coke, aggregate, or plastic. Initially both medium and cells are fed into the top of the packed bed.

PACKING MATERIALS (PACKED BED COLUMN )

PACKING MATERIALS (PACKED BED COLUMN )

PACKING MATERIALS (PACKED BED COLUMN ) : In packed bed / packed tower generally two types of packing materials are used. 1) Regural Packing 2) Random Pack..

Packed Bed Tower Scrubbers - Tri-Mer

Packed Bed Tower Scrubbers - Tri-Mer

Packed Bed Tower Scrubbers • for gaseous emissions - NOx, Cl2, SO2, others • acid fumes, including H2SO4, HCI, HNO3, and HF • odor control – single and multi-stage units • combination systems for hot and cold gases • Systems can incorporate particulate control, gas .