On the transport and speciation of ruthenium in high temperature oxidising conditions

Ulrika Backman, Maija Lipponen, Ari Auvinen, Unto Tapper, Riitta Zilliacus, Jorma K. Jokiniemi (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)

Abstract

In this paper, the transport and speciation of ruthenium under conditions simulating an air ingress accident was studied. Ruthenium dioxide was exposed to an oxidising environment at high temperatures (>1200 °C) in a tubular flow furnace. At these conditions, volatile ruthenium species were formed. A major part of the released ruthenium was deposited in the tube as RuO2. Depending on the experimental conditions, 12–35 wt. % of the released ruthenium was trapped in the outlet filter as RuO2 particles. At completely dry conditions using stainless steel tubes, only 0.1–0.2 wt. % of the released ruthenium reached the trapping bottle as gaseous RuO4. However, when alumina was applied as tube material or the atmosphere contained some water vapour and silver seed particles, the fraction of gaseous ruthenium reaching the trapping bottle increased to 5 wt. % which is close to thermodynamic equilibrium. This indicates that RuO2 does not catalyse the decomposition of RuO4.
Original languageEnglish
Pages (from-to)297 - 304
Number of pages8
JournalRadiochimica Acta
Volume93
Issue number5
DOIs
Publication statusPublished - 2005
MoE publication typeA1 Journal article-refereed

Fingerprint

Ruthenium
ruthenium
Bottles
bottles
Temperature
tubes
trapping
Aluminum Oxide
Stainless Steel
Steam
Silver
thermodynamic equilibrium
outlets
Seed
accidents
dioxides
Accidents
Furnaces
furnaces
water vapor

Keywords

  • silver
  • nanoparticles
  • nucleation
  • formation
  • collisions
  • evaporation-condesation

Cite this

Backman, Ulrika ; Lipponen, Maija ; Auvinen, Ari ; Tapper, Unto ; Zilliacus, Riitta ; Jokiniemi, Jorma K. / On the transport and speciation of ruthenium in high temperature oxidising conditions. In: Radiochimica Acta. 2005 ; Vol. 93, No. 5. pp. 297 - 304.
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abstract = "In this paper, the transport and speciation of ruthenium under conditions simulating an air ingress accident was studied. Ruthenium dioxide was exposed to an oxidising environment at high temperatures (>1200 °C) in a tubular flow furnace. At these conditions, volatile ruthenium species were formed. A major part of the released ruthenium was deposited in the tube as RuO2. Depending on the experimental conditions, 12–35 wt. {\%} of the released ruthenium was trapped in the outlet filter as RuO2 particles. At completely dry conditions using stainless steel tubes, only 0.1–0.2 wt. {\%} of the released ruthenium reached the trapping bottle as gaseous RuO4. However, when alumina was applied as tube material or the atmosphere contained some water vapour and silver seed particles, the fraction of gaseous ruthenium reaching the trapping bottle increased to 5 wt. {\%} which is close to thermodynamic equilibrium. This indicates that RuO2 does not catalyse the decomposition of RuO4.",
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author = "Ulrika Backman and Maija Lipponen and Ari Auvinen and Unto Tapper and Riitta Zilliacus and Jokiniemi, {Jorma K.}",
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Backman, U, Lipponen, M, Auvinen, A, Tapper, U, Zilliacus, R & Jokiniemi, JK 2005, 'On the transport and speciation of ruthenium in high temperature oxidising conditions', Radiochimica Acta, vol. 93, no. 5, pp. 297 - 304. https://doi.org/10.1524/ract.93.5.297.64280

On the transport and speciation of ruthenium in high temperature oxidising conditions. / Backman, Ulrika; Lipponen, Maija; Auvinen, Ari; Tapper, Unto; Zilliacus, Riitta; Jokiniemi, Jorma K. (Corresponding Author).

In: Radiochimica Acta, Vol. 93, No. 5, 2005, p. 297 - 304.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - On the transport and speciation of ruthenium in high temperature oxidising conditions

AU - Backman, Ulrika

AU - Lipponen, Maija

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AU - Tapper, Unto

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AU - Jokiniemi, Jorma K.

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AB - In this paper, the transport and speciation of ruthenium under conditions simulating an air ingress accident was studied. Ruthenium dioxide was exposed to an oxidising environment at high temperatures (>1200 °C) in a tubular flow furnace. At these conditions, volatile ruthenium species were formed. A major part of the released ruthenium was deposited in the tube as RuO2. Depending on the experimental conditions, 12–35 wt. % of the released ruthenium was trapped in the outlet filter as RuO2 particles. At completely dry conditions using stainless steel tubes, only 0.1–0.2 wt. % of the released ruthenium reached the trapping bottle as gaseous RuO4. However, when alumina was applied as tube material or the atmosphere contained some water vapour and silver seed particles, the fraction of gaseous ruthenium reaching the trapping bottle increased to 5 wt. % which is close to thermodynamic equilibrium. This indicates that RuO2 does not catalyse the decomposition of RuO4.

KW - silver

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KW - nucleation

KW - formation

KW - collisions

KW - evaporation-condesation

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