Rob Stevens

Rob Stevens

Oslo, Oslo, Norge
8k følgere Over 500 forbindelser

Om

Trilingual executive contributing to green investment opportunities in the ammonia energy…

Artikler fra Rob

  • Carrying hydrogen past the finish line

    Carrying hydrogen past the finish line

    Carrying hydrogen past the finish line: Comparing the potential of ammonia vs. LOHC The energy transition and hydrogen…

    11 kommentarer

Aktivitet

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Erfaring

  • Topsoe grafisk

    Topsoe

    Oslo, Oslo, Norway

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    global

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    Oslo, Norway

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    Amersfoort, Utrecht, Netherlands

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    worldwide

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    worldwide

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    Oslo, Norway

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    Oslo, Norway

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    Oslo, Norway

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    Oslo Area, Norway

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    worldwide

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    Oslo Area, Norway

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    Oslo Area, Norway

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    Western Australia, Australia

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    Pilbara, Karratha, Western Australia

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    Pilbara, Western Australia

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    Telemark County, Norway

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    Porsgrunn

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Utdanning

Frivillig arbeid

  • Board member and outdoor activity leader

    Dutch Speaking Association Qatar

    - 2 år 11 måneder

    Social Services

    Establish network and familirisation activities for Dutch speaking expats in Qatar.

  • Chairman of the parents council

    International School Telemark

    - 2 år

    Education

    Facilitate dialogue between the parents and the school management and board on educational quality.

  • Board Member

    International School Telemark

    - 2 år 2 måneder

    Education

    Representing neighbouring Industry in the board of IST.

  • Nederlandse Ski Vereniging grafisk

    Boardmember

    Nederlandse Ski Vereniging

    - 2 år 4 måneder

    Health

    Board member of the Nordic Sports board

  • Nederlandse Ski Vereniging grafisk

    Trainer and guide

    Nederlandse Ski Vereniging

    - 3 år 6 måneder

    Social Services

    Trainer at the Hague cross country ski club and volunteer at the Dutch national disabled ski team

Publikasjoner

  • Carbamate in an ammonia plant.

    AIChE Ammonia safety symposium, 54th proceedings

    Yara runs a 1400MTPD ammonia plant in Porsgrunn as feedstock for further downstream processing into nitric acid and NPK( Yara’s nitrophosphate process). The ammonia plant dates from 1968 and is a Humphrey’s & Glasgow design, revamped in 1997 by Kellog. Synthesis and CO2 removal are own design. The feed based upon ethane/propane/butane mixtures, whereas the fuelgas can include carbon monoxide rich gas.
    Due to instability in the carbon dioxide removal process operational personal had problems…

    Yara runs a 1400MTPD ammonia plant in Porsgrunn as feedstock for further downstream processing into nitric acid and NPK( Yara’s nitrophosphate process). The ammonia plant dates from 1968 and is a Humphrey’s & Glasgow design, revamped in 1997 by Kellog. Synthesis and CO2 removal are own design. The feed based upon ethane/propane/butane mixtures, whereas the fuelgas can include carbon monoxide rich gas.
    Due to instability in the carbon dioxide removal process operational personal had problems in keeping the ammoniaplant in stable operations. In an ultimate attempt in keeping the front-end in operation the methanator was bypassed, after a high temperature trip. Bypassing the methanator is an option which can be exercised in many ammonia plants, with or without the use of a flare up- or downstream the methanator.
    Due to a combination of circumstances carbon dioxide rich gas reached the synthesis gas compressor.
    The sequence of events leading to the stop of the plant will be discussed, including the findings and measures to avoid an event like this.

    Other authors
    See publication
  • Nipping of reformer tube pigtails. Precautions and Mitigation of Incidents.

    AIChE Ammonia safety symposium, 54th proceedings

    Yara runs a 1400MTPD ammonia plant in Porsgrunn as feedstock for further downstream processing into nitric acid and NPK( Yara’s nitrophosphate process). The ammonia plant dates from 1968 and is a Humphrey’s & Glasgow design, revamped in 1997 by Kellog. Synthesis and CO2 removal are own design. The feed based upon propane\butane mixtures, whereas the fuelgas can include carbon monoxide rich gas.
    Due to unforeseen circumstances the plant experienced in 2008 a frequent leakage of the reformer…

    Yara runs a 1400MTPD ammonia plant in Porsgrunn as feedstock for further downstream processing into nitric acid and NPK( Yara’s nitrophosphate process). The ammonia plant dates from 1968 and is a Humphrey’s & Glasgow design, revamped in 1997 by Kellog. Synthesis and CO2 removal are own design. The feed based upon propane\butane mixtures, whereas the fuelgas can include carbon monoxide rich gas.
    Due to unforeseen circumstances the plant experienced in 2008 a frequent leakage of the reformer tubes into the furnace itself. In order to avoid a full stoppage and the availability of external access the practice of nipping the pigtails outlet reformer was practised.
    Certain routines were established to do the nipping exercise in a safe way, having no leakages to the surroundings, nor endangering the people involved. However during one nipping exercise the pigtail ruptured and an explosive fire occurred, fortunately without injuries.
    In this paper it will be discussed on how the routines were established in a procedure and how this procedure was improved to reduce the risks even more, even focussing on nipping training for all those involved

    See publication
  • Self-supported flare-stack vibrations in ammonia plant

    AIChE Ammonia safety symposium, 53rd proceedings; Process Safety Progress, 29 (2010): 254–263

    Qatar Fertilizers Company (QAFCO), Ammonia-3 is a 1,500 metric tons per day (MTPD) plant, designed, supplied, and commissioned by a company (Division of Thyssen Krupp Group) (UHDE) in 1997. The main gas flare stack is a self-supported free-standing structure with a height of 70.5 m, located in the middle of the plant. Excessive vibrations/shaking of the flare and flare structure were observed due to mixing of NH3 and CO2 rich gases in the presence of water. Ammonium carbonate and bicarbonate…

    Qatar Fertilizers Company (QAFCO), Ammonia-3 is a 1,500 metric tons per day (MTPD) plant, designed, supplied, and commissioned by a company (Division of Thyssen Krupp Group) (UHDE) in 1997. The main gas flare stack is a self-supported free-standing structure with a height of 70.5 m, located in the middle of the plant. Excessive vibrations/shaking of the flare and flare structure were observed due to mixing of NH3 and CO2 rich gases in the presence of water. Ammonium carbonate and bicarbonate sludge (salts) formed in the flare stack and increased resistance to the gas flow path. The partial blockage increased the pressure at the flare-stack bottom and the sudden release of the gases gave vibrations (surging effects) to the flare stack. The flare stack was drained after unplugging the stack-bottom drains. Hot-process gases (167°C) from the low temperature shift converter (LTS) outlet were lined up to the flare stack in small quantity to melt the deposits. Flare vibrations completely stopped after 3 days. Inspection of the weld joints and foundation bolts was done, and no abnormalities were found. No vibrations were observed during all normal/emergency plant shutdowns faced after the incident. The work describes the root cause of unique experience of flare-stack vibrations, and the way the problem was solved online. © 2010 American Institute of Chemical Engineers Process Saf Prog, 2010

    Other authors
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  • Phase Equilibria and other physicochemical aspects of interest for enzymatic reactions in near-critical carbon dioxide

    Delft University Press

    Near-critical fluids can be applied as solvents for performing enzyme catalysis. Understanding enzymatic reactions in near-critical fluids is only possible when the phase behaviour of the reactants in the near-critical solvent and other physicochemical aspects, such as water isotherms and kinetics are known. In this thesis these effects are studied using a multidisciplinary approach in which thermodynamics, enzymologie and process engineering are integrated. Five different enzymes have been…

    Near-critical fluids can be applied as solvents for performing enzyme catalysis. Understanding enzymatic reactions in near-critical fluids is only possible when the phase behaviour of the reactants in the near-critical solvent and other physicochemical aspects, such as water isotherms and kinetics are known. In this thesis these effects are studied using a multidisciplinary approach in which thermodynamics, enzymologie and process engineering are integrated. Five different enzymes have been tested and modeled in a hydrolysis reaction of ten different substrates. Experiments and modelling were performed on the vapour-liquid phase behaviour of binary systems of interest for enzymatic reactions in near-critical fluids.

    See publication

Patenter

  • Spraying device and method for fluidised bed granulation

    Utstedt EU WO/2005/061118

    The invention concerns a spraying device for melt granulation in fluidised bed comprising a nozzle (2) with a feed channel for a liquid to be atomised, where the liquid is led through emulsifying means and into an internal mixing chamber for gas and liquid, before it is fed to the fluidised bed. The nozzle has a separate channel for the atomising gas fitted concentrically around the central liquid supply channel for the liquid to be atomised or nebulised. The mixing chamber surrounds the outlet…

    The invention concerns a spraying device for melt granulation in fluidised bed comprising a nozzle (2) with a feed channel for a liquid to be atomised, where the liquid is led through emulsifying means and into an internal mixing chamber for gas and liquid, before it is fed to the fluidised bed. The nozzle has a separate channel for the atomising gas fitted concentrically around the central liquid supply channel for the liquid to be atomised or nebulised. The mixing chamber surrounds the outlet zone of the liquid spray from the emulsifying means and the gas, allowing efficient mixing of high speed atomisation gas and liquid, and having an external gas cap (1) where fluidisation gas is channelled into a spout above the spraying device.

    Other inventors
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  • PROCESS FOR PRODUCING A NS-FERTILIZER

    Utstedt EU WO/2001/098233

    A process for preparing a fertiliser composition comprising an ammonium nitrate and calcium sulphate, wherein a first mixture is made comprising 50-70 % by weight of ammonium nitrate, 10-40 % by weight of dihydrate calcium sulphate and water in order to obtain a second mixture containing 5-25 % by weight of free water which is allowed to react at a temperature of 90-165 °C during at least 2 minutes in order to allow the dihydrate calcium sulphate to be converted into hemihydrate calcium…

    A process for preparing a fertiliser composition comprising an ammonium nitrate and calcium sulphate, wherein a first mixture is made comprising 50-70 % by weight of ammonium nitrate, 10-40 % by weight of dihydrate calcium sulphate and water in order to obtain a second mixture containing 5-25 % by weight of free water which is allowed to react at a temperature of 90-165 °C during at least 2 minutes in order to allow the dihydrate calcium sulphate to be converted into hemihydrate calcium sulphate, and subsequently allowing the free water to be evaporated until a second mixture is obtained containing 1,5-8 % by weight free water.

    Other inventors
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  • DÜNGEMITTEL-GRANULATIONS-ZUSÄTZE ENTHALTEND MAGNESIUM- UND KALZIUM- KARBONAT UND SULFAT

    Utstedt EU EP1232129

    Chemical composition to be used as additive for fertiliser composition, comprising 35 - 60 % by weight of magnesium sulphate, 5 - 35 % by weight of calcium sulphate, 10 - 35 % by weight of a mixture containing magnesium carbonate and calcium carbonate up to 5 % by weight of water, either free or bound as crystal water, and the balance magnesium oxide.

    Other inventors
    See patent

Kurs

  • Australian Gas Industry, Pricing and market developments; Commercial gas contracts, Informa corporate learning, 11/15

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  • Innovation Masterclass Product and Technology Roadmapping, Moon on a stick, Jay Paap, 06/17

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  • Leadership and cultural awareness training, PeopleSense, 2013-2016

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  • Masterclass Strategic Competitive Intelligence, Rodenberg&Tillman, Joseph Rodenberg 10/18

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  • Reporting to the board, Australian Institute of Company Directors, 11/16

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Språk

  • English

    Komplett profesjonell kompetanse

  • Dutch

    Morsmål eller tospråklig kompetanse

  • Bokmål, Norwegian

    Faglig yrkeskompetanse

  • German

    Faglig yrkeskompetanse

  • French

    Grunnleggende kunnskap

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