CLC Hot Rig - Chemical Looping Combustion Rig

Facility Location
City & country
Trondheim (Norway)
Sem Sælands vei 11, 7034
Description & contacts of the access provider
Legal name of organisation
SINTEF ER - SINTEF Energy Research
Infrastructure contact - Primary contact
Øyvind Langørgen
RICC contact - Secondary contact
Sigurd Weidemann Løvseth
Facility Availability
Unit of access
Availability per year
15 days
Expected duration of single experiment:
3 days
Operational or other constraints
Specific risks:
Tests must be planned well ahead because of constraints on gas delivery, air compressor etc. Oxygen carriers must be provided by the user and an amount of about 150 kg will be needed. Necessary instructions for operation is important in order to reduce risks, but one experienced person from SINTEF ER will anyhow have to participate. Most important risks are related to the handling of large amounts of oxygen carriers and handling and use of combustible gases.

The CLC rig is a Double Loop Circulating Fluidized Bed reactor system used for research on chemical looping combustion. The design values are 150 kW gaseous fuels input and reactor temperature of 1000°C. The rig consists of an Air Reactor(AR) and a Fuel Reactor(FR), interconnected by divided loop-seals and a bottom lifter. The reactor design is flexible as the reactors can be run individually because of the divided loop seals,and the fuel reactor can both be run as a CFB and as a bubbling bed because of the possibilities of using the bottom lifter.

The reactors are 6 m tall with internal diameters 230 mm and 154 mm for AR and FR, respectively. The reactor system is equipped with exhaust gas coolers as well as cooling panels within the air reactor. The coolers can be cooled with pressurized air or steam. The main operational characteristics of the rig can be listed as follows:

  • Air feed: flow rate up to 410 kg/h, preheat temperature 20 – 900°C
  • Reactor pressure up to 300 mbar (g) and temperature up to 1000°C.
  • Gas supplies: CH4, H2, propane, N2 and CO2
  • Solid fuel feeding through feeding screw
  • Total pressurized air supply: 10 m3/min air at 8 bar

 To monitor, control and analyse the process, the rig is equipped with:

  • Numerous pressure and temperature transducers distributed around the reactor system
  • Gas flow controllers for gas inlets
  • IR gas analysers (Teledyne) for CO, CO2 and CH4 concentration out of both reactors
  • Paramagnetic O2 analyser (Servomex) for oxygen concentration out of both reactors
  • FTIR gas analyser available for measurements of other components
  • Particle analysis available through SINTEF MC laboratory

The control system is based on a National Instruments compact RIO controller. It is programmed using LabVIEW which enables us to execute quick changes in the control system software. It communicates with a Windows based system over network using an ethernet connection. This also enables other clients (i.e laptops, smart phones) to access the data acquired by the system. The control system currently counts 136 input channels and output channels, analogue and digital. 


Reactor details and complete rig installation
Reactor details and complete rig installation
Reactor details and complete rig installation
CLC hot rig Process Flow Diagram
State of the art, uniqueness, & specific advantages

The CLC Rig is a rather large test facility for CLC with nominal fuel input of 150 kW and reactors height of 6 meters. Both the fuel reactor and the air reactor are based on circulating fluidized bed (CFB) technology and the fuel reactor diameter is smaller than the air reactor because of the smaller gas flow. This is very much in line with design considerations for a commercial unit as pointed out in Lyngfelt and Leckner (2015). Since the fuel reactor also can be run in bubbling bed mode with particle circulation through the lifter, the system possess large flexibility in operation. Per today the rig is operated on gaseous fuels and a rebuild and adaption to solid fuels and biomass is now taking place.

Scientific Environment

The SINTEF ER CLC Rig offers assessment of fuel conversion, oxygen carrier's attrition and other important characteristics of the CLC process through exhaust gas emission measurements and particle sampling during operation. Oxygen carrier particle samples can be analysed mechanically and chemically by another department at the campus. They can also contribute with some preparation of the oxygen carrier particles, especially on particle size classification.


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selected publications

Øyvind Langørgen, Inge Saanum, Nils Erland L. Haugen (2016)
Chemical looping combustion of methane using a copper-based oxygen carrier in a 150 kW reactor system
Proceedings from 13th International Conference on Greenhouse Gas Control Technologies, GHGT-13, 14-18 November 2016, Lausanne, Switzerland
Øyvind Langørgen, Inge Saanum, Nils Erland L. Haugen (2016)
Performance of a 150 kW chemical looping combustion reactor system for gaseous fuels using a copper-based oxygen carrier
4th International Conference on Chemical Looping, September 26-28, 2016, Nanjing, China
Øyvind Langørgen, Inge Saanum, Jørn Bakken (2015)
Performance and operability of a 150 kW Chemical Looping Combustion reactor system for gaseous fuels
22nd International Symposium on Combustion Processes, Katowice, Poland, September 2015
Bischi, Aldo; Langørgen, Øyvind; Bolland, Olav (2013)
Double loop circulating fluidized bed reactor system for two reaction processes, based on pneumatically controlled divided loop-seals and bottom extraction/lift
Powder Technology. Volum 246. s. 51-62, 2013
Bischi A., Langørgen Ø., Saanum I., Bakken J., Seljeskog M., Bysveen M., Morin J.-X., Bolland O., (2011)
Design study of a 150kW double loop circulating fluidized bed reactor system for chemical looping combustion with focus on industrial applicability and pressurization
Int. J. Greenhouse Gas Control, Vol 5, No 3, pp. 467–474