EP0492269A1 - Combustible gazeux à 4 composés comprenant de l'acétylène approprié à être stocké et transporté en état liquide - Google Patents

Combustible gazeux à 4 composés comprenant de l'acétylène approprié à être stocké et transporté en état liquide Download PDF

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Publication number
EP0492269A1
EP0492269A1 EP91121188A EP91121188A EP0492269A1 EP 0492269 A1 EP0492269 A1 EP 0492269A1 EP 91121188 A EP91121188 A EP 91121188A EP 91121188 A EP91121188 A EP 91121188A EP 0492269 A1 EP0492269 A1 EP 0492269A1
Authority
EP
European Patent Office
Prior art keywords
acetylene
mol
gas
ethylene
fuel gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91121188A
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German (de)
English (en)
Other versions
EP0492269B1 (fr
Inventor
Helmut Dipl.-Ing. Meinass
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linde GmbH
Original Assignee
Linde GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Priority to AT91121188T priority Critical patent/ATE95225T1/de
Publication of EP0492269A1 publication Critical patent/EP0492269A1/fr
Application granted granted Critical
Publication of EP0492269B1 publication Critical patent/EP0492269B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/02—Compositions containing acetylene

Definitions

  • the invention relates to a multi-component fuel gas mixture with a main part of acetylene and a main part of ethylene, the mixture being manageable in cryogenic, liquefied form.
  • acetylene is an extremely advantageous fuel gas, which is clearly superior to other fuel gases such as methane and propane in terms of properties such as flame temperature, primary flame output and ignition speed.
  • other fuel gases such as methane and propane in terms of properties such as flame temperature, primary flame output and ignition speed.
  • acetylene is a fuel gas with a positive enthalpy of formation and, under certain conditions, continuous decay can occur under certain conditions without additional energy and without oxygen. For this reason, acetylene must not simply be stored in "normal" gas cylinders with higher pressures because this creates safety-intolerable conditions.
  • combustible gas mixtures which can be handled as liquid gas have now been proposed, which result in largely safe handling and at the same time have acceptable combustible gas properties.
  • These include, in particular, three-component mixtures of acetylene, ethylene and propane or propylene (propane or propylene are so-called C3-hydrocarbons) .
  • These known three-component mixtures can be divided into two groups, with one of the mixing groups in addition to the important acetylene component (proportions from 15 to 50 vol % are mentioned) high ethylene fractions and in which other high propane or propylene fractions are proposed as the second essential mixture fractions.
  • the third part of the mixture in each group is the gas not yet mentioned, i.e. the C3 hydrocarbon on the one hand and ethylene on the other (see EP-PS 0 060 769 and Chemical Abstracts, 84 (1976) 26, abstract 18 23 65 n) .
  • the problem to be solved by the present invention arises from this problem, namely to create a fuel gas mixture which can be handled as liquid gas and which provides the best possible flame properties, largely in the direction of pure acetylene, which has a lower density in gaseous form than air and which is nevertheless present in everyone Operating situation meets high safety requirements.
  • This object is achieved with a fuel gas mixture that is in the liquid phase 22 to 32 mol% acetylene, 1 to 4 mol% of a C3 hydrocarbon, 10 to 20 mol% of ethane and the rest of ethylene, thus contains about 67 to 44 mol% of ethylene, with higher proportions of C3 hydrocarbon and ethane also tending to be more advantageous toward higher acetylene values.
  • a fuel gas which, with good performance and a lower density than air, also has a high level of safety.
  • An essential safety aspect is that, in the fuel gas mixtures according to the invention, the acetylene content in the gas volume present above the stored quantity of liquid gas does not increase beyond critical values even when fuel gas is removed from the gas phase.
  • ethylene is again the most volatile part of the liquid phase in the case of fuel gases according to the invention and thus decreases most strongly in the course of emptying, while the C3 hydrocarbon has the opposite property and the contrary behavior and thus counteracts the decrease in ethylene with a C3 increase is.
  • the consequence of this is a far-reaching "stabilization" of the acetylene content in the liquid phase and also in the gas phase over the entire emptying process. This also applies, especially in the worst case of gaseous extraction.
  • the case of liquid withdrawal represents the less critical and preferable case in practical use, since the mixture proportions are not subject to any significant change.
  • the 4-component mixtures according to the invention thus achieve advantages over the known mixtures, above all in the sense of an increased acetylene content with the same level of safety.
  • Compositions have particularly advantageous fuel gas mixtures according to the invention 24 to 28 mol% acetylene, 2 to 3 mol% of C3 hydrocarbon, preferably propylene, 13 to 17 mol% of ethane and the rest (about 61 to 52 mole%) ethylene.
  • the gas mixtures proposed according to the invention are shown as a framed area.
  • the ethane and ethylene fractions have been combined to make a total of 4 components in the three-component diagram.
  • the ethylene-ethane scale is viewed as a pure ethylene scale
  • the three-substance mixtures according to EP-PS 0 060 769 can be entered in this diagram for illustration (area within the additionally marked points).
  • the fuel gas mixtures proposed here are equipped with higher proportions of acetylene in comparison to these three-substance mixtures and thus have more pronounced properties of acetylene in the flame properties.
  • C3 hydrocarbon are provided in the mixtures according to the invention, which keep the density of the resulting fuel gas low. However, a sufficient stabilizing effect for the mixture is nevertheless achieved.
  • acetylene concentrations for a three-substance mixture are given in brackets 22% acetylene, 6% propylene and 72% ethylene given for comparison. It can be seen that the proportion of acetylene in the gas increases significantly with increasing emptying. As can be deduced from the table, this effect is much more pronounced in the three-substance mixtures considered (details in brackets) than in the four-substance mixtures considered (values in the table are calculated values for the respective evacuation state in thermal equilibrium). For safety reasons, however, the proportion of acetylene in the gas phase - as explained above - should remain as low as possible in all emptying stages in order to prevent acetylene decomposition. A value of 97.2% is achieved with the mixture according to the invention with 48.2% acetylene content in the gas, which is well below the 50% mark which characterizes a good safety standard.
  • Exact versions can also be seen in part in FIG. 2, in which acetylene concentrations in the gas phase are plotted with 97% emptying compared to initial concentrations of acetylene in the liquid (emptying by removal of gas).
  • 3-component mixtures are also entered, in each case the propylene fraction line which represents the limit to higher densities than air is emphasized.
  • the mixture of 22; 2; 15; 61 is included in this diagram as point C. It can again be clearly seen that the comparative three-substance mixtures give significantly higher acetylene fractions in the gas phase at high emptying stages with the same initial concentration of acetylene in the liquid.
  • a liquid gas fuel gas according to the invention which is optimized in many aspects, consists of 26 mol% acetylene, 3 mole% propylene 15 mole% ethane and 56 mole% ethylene. This is advantageously stored at temperatures between -60 and -80 ° C and under pressures of 4 to 6 bar and thus also made available to the consumer. For use, this fuel gas is advantageously removed in the liquid state, sent through an evaporator and then fed to the point of use.
  • the fuel gas mixtures according to the invention are efficient, meet high safety requirements and are easy to handle as liquefied gases within the limits known for acetylene. They offer the possibility of a safe and efficient fuel gas supply based on liquid gas with advantages such as large storage capacity with comparatively small space requirements and low weight.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Liquid Carbonaceous Fuels (AREA)
EP91121188A 1990-12-21 1991-12-10 Combustible gazeux à 4 composés comprenant de l'acétylène approprié à être stocké et transporté en état liquide Expired - Lifetime EP0492269B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91121188T ATE95225T1 (de) 1990-12-21 1991-12-10 Acetylenhaltiges 4-komponenten-brenngasgemisch mit eignung zur lagerung und zum transport in verfluessigtem zustand.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4041306 1990-12-21
DE4041306A DE4041306A1 (de) 1990-12-21 1990-12-21 Acetylenhaltiges 4-komponenten-brenngasgemisch mit eignung zur lagerung und zum transport in verfluessigtem zustand

Publications (2)

Publication Number Publication Date
EP0492269A1 true EP0492269A1 (fr) 1992-07-01
EP0492269B1 EP0492269B1 (fr) 1993-09-29

Family

ID=6421109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91121188A Expired - Lifetime EP0492269B1 (fr) 1990-12-21 1991-12-10 Combustible gazeux à 4 composés comprenant de l'acétylène approprié à être stocké et transporté en état liquide

Country Status (4)

Country Link
EP (1) EP0492269B1 (fr)
AT (1) ATE95225T1 (fr)
DE (2) DE4041306A1 (fr)
ES (1) ES2046840T3 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1303378A (fr) * 1971-03-09 1973-01-17
US3861160A (en) * 1973-08-09 1975-01-21 Tenneco Chem Process for safe storage, handling, and use of acetylene
EP0060768A1 (fr) * 1981-03-16 1982-09-22 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Combustible cryogénique ternaire stable à densité à l'état gazeux inférieure à l'air
EP0313176A2 (fr) * 1987-10-21 1989-04-26 Praxair S.T. Technology, Inc. Mélange gaz combustible-oxydant par revêtement à la flamme au moyen d'un canon à détonation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1303378A (fr) * 1971-03-09 1973-01-17
US3861160A (en) * 1973-08-09 1975-01-21 Tenneco Chem Process for safe storage, handling, and use of acetylene
EP0060768A1 (fr) * 1981-03-16 1982-09-22 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Combustible cryogénique ternaire stable à densité à l'état gazeux inférieure à l'air
EP0313176A2 (fr) * 1987-10-21 1989-04-26 Praxair S.T. Technology, Inc. Mélange gaz combustible-oxydant par revêtement à la flamme au moyen d'un canon à détonation

Also Published As

Publication number Publication date
ATE95225T1 (de) 1993-10-15
DE59100435D1 (de) 1993-11-04
DE4041306A1 (de) 1992-06-25
EP0492269B1 (fr) 1993-09-29
ES2046840T3 (es) 1994-02-01

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