Reactive liquid based gas storage and delivery systems
AssigneeAir Products and Chemicals, Inc.
InventorsDaniel Joseph Tempel, Philip Bruce Henderson, Jeffrey Richard Brzozowski
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Abstract
This invention relates generally to an improvement in low pressure storage and dispensing systems for the selective storing of gases having Lewis acidity or basicity, and the subsequent dispensing of said gases at pressures, e.g., generally below 5 psig and typically below atmospheric pressure, by modest heating, pressure reduction or both. The improvement resides in storing the gases in a reversibly reacted state within a reactive liquid having opposing Lewis basicity or acidity.
Claims22
In a process for effecting storage of a gas, within a storage and delivery system comprised of, i) a vessel containing a medium capable of storing a gas, and ii) a regulator for delivery of said gas stored in said medium from said vessel, the improvement selected from the group consisting of:
- storing a gas having Lewis basicity in a reversibly reacted state within a medium comprised of a reactive liquid having Lewis acidity;
- and,
- storing a gas having Lewis acidity in a reversibly reacted state within a medium comprised of a reactive liquid having Lewis basicity.
In a process for effecting storage of a gas, in a storage and delivery system comprised of, i) a vessel containing a medium capable of storing a gas, and ii) a regulator for delivery of said gas stored in said medium from said vessel, the improvement which comprises:
- storing a gas having Lewis basicity in a reversibly reacted state within a medium comprised of a reactive liquid having Lewis acidity;
- where said gas is selected from the group consisting of arsine and phosphine and said liquid is an ionic liquid having a dialkyl-imidazolium cation and a chlorocuprate or chloroaluminate anion.
In a process for effecting storage of a gas, in a storage and delivery system comprised of, i) a vessel containing a medium capable of storing a gas, and ii) a regulator for delivery of said gas stored in said medium from said vessel, the improvement which comprises:
- storing a gas having Lewis acidity selected from the group consisting of diborane, boron trifluoride, boron trichloride, SiF4, germane, hydrogen cyanide, HF, HCl, Hl, HBr, GeF4, isotopically-enriched analogs, acidic organic, organometallic compounds and mixtures thereof, in a reversibly reacted state within a medium comprised of a reactive ionic liquid having Lewis basicity employing an anion selected from the group consisting of BF4−, p-CH3—C6H4SO3−, CF3SO3−, (CF3SO2)2N−, (NC)2N−(CF3SO2)3C−, CH3COO− and CF3COO− and a cation selected from the group consisting of alkylphosphonium, alkylammonium, N-alkylpyridinium or N,N′-dialkylimidazolium.
In a process for effecting storage and of a gas, in a storage and delivery system comprised of, i) a vessel containing a medium capable of storing a gas and ii) a regulator for delivery of said gas stored in said medium from said vessel, the improvement for effecting storage by a method selected from the group consisting of:
- storing a gas having Lewis basicity in a reversibly reacted state within a reactive liquid having Lewis acidity wherein the Gibbs Free energy of reaction between the gas having Lewis basicity within a reactive liquid having Lewis acidity is from about −1 to −6 kcal/mol of reactive group over a temperature range of from 0 to 150° C;
- and,
- storing a gas having Lewis acidity in a reversibly reacted state within a reactive liquid having Lewis basicity and wherein the Gibbs Free energy of reaction between the gas having Lewis acidity within a reactive liquid having Lewis basicity is from about −1 to −6 kcal/mol of reactive group over a temperature range of from 0 to 150° C.
In a process for effecting storage of a gas, in a storage and delivery system comprised of, i) a vessel containing a medium capable of storing a gas and ii) a regulator for delivery of said gas stored in said medium from said vessel, the improvement for effecting storage by a method selected from the group consisting of:
- storing a gas having Lewis basicity in a reversibly reacted state within a reactive liquid having Lewis acidity wherein the Gibbs Free energy of reaction between the gas having Lewis basicity within a reactive liquid having Lewis acidity is from from −2.5 to −3.5 kcal/mole of reactive group at 25° C;
- storing a gas having Lewis acidity in a reversibly reacted state within a reactive liquid having Lewis basicity and wherein the Gibbs Free energy of reaction between the gas having Lewis acidity within a reactive liquid having Lewis basicity is from about −2.5 to −3.5 kcal/mol of reactive group at 25° C;
- and,
- wherein the reactive liquid is an ionic liquid and the anion component of the reactive liquid is a cuprate, aluminate, or borate and the cation component is derived from an N,N′-dialkylimidazolium salt.
Dependencies are inferred from the claim text.