Abstract: A method for operating a plant during an upset condition is provided. The plant includes a hydrogen plant having a syngas generator, a syngas separation unit having one or more of a pressure swing adsorption, temperature swing adsorption, or membrane system, and a carbon dioxide removal system having one or more of a syngas separation unit tail gas dryer/compressor, a cryogenic cold box, a membrane separator, and a carbon dioxide compression unit. The method for operating the plant when the syngas separation unit and carbon dioxide removal system are off-line includes introducing a process feed stream and a burner fuel stream into the syngas generator, thereby producing a flue gas stream and a syngas stream; and bypassing the off-line syngas separation unit and carbon dioxide removal system and combining at least a portion of the cooled shifted syngas with burner fuel stream.

Abstract: A method for operating a plant during an upset condition is provided. The plant includes a hydrogen plant having a syngas generator, a syngas separation unit having one or more of a pressure swing adsorption, temperature swing adsorption, or membrane system, and a carbon dioxide removal system having one or more of a syngas separation unit tail gas dryer/compressor, a cryogenic cold box, a membrane separator, and a carbon dioxide compression unit. The method for operating the plant when the carbon dioxide removal system is off-line includes introducing a process feed stream and a burner fuel stream into the syngas generator, thereby producing a flue gas stream and a syngas stream; introducing the syngas stream into the syngas separation unit, thereby producing a hydrogen product stream and a syngas separation unit tail gas stream; and bypassing the off-line carbon dioxide removal system and combining at least a portion of the syngas separation unit tail gas with burner fuel stream.

Abstract: A gas detection and fire suppression system is proposed that includes at least one hydrogen gas detector located proximate to a hydrogen salt cavern wellhead, the at least one hydrogen gas detector configured to generate a signal upon detecting a concentration of hydrogen gas above a predetermined threshold. The system also includes at least one automatic self oscillating fire monitor located proximate to the hydrogen salt cavern wellhead, the at least one automatic self oscillating fire monitor configured to activate upon the receive a signal from the at least one hydrogen gas detector. And the system includes an alarm, wherein the alarm is configured to activate upon the receipt of the signal from the at least one hydrogen gas detector.

Abstract: A gas detection and fire suppression system is proposed that includes at least one hydrogen gas detector located proximate to a hydrogen salt cavern wellhead, the at least one hydrogen gas detector configured to generate a signal upon detecting a concentration of hydrogen gas above a predetermined threshold. The system also includes at least one automatic self oscillating fire monitor located proximate to the hydrogen salt cavern wellhead, the at least one automatic self oscillating fire monitor configured to activate upon the receive a signal from the at least one hydrogen gas detector. And the system includes an alarm, wherein the alarm is configured to activate upon the receipt of the signal from the at least one hydrogen gas detector.

Abstract: A method and apparatus is provided which will provide over-pressure protection for an underground storage cavern by reducing the pressure of a pressurized gas stream originating from the an underground storage cavern to form a lower pressure gas stream, monitoring the pressure of a lower pressure gas stream and stopping the flow of the lower pressure gas stream to the pipeline should the pressure of the lower pressure gas stream exceed a threshold value.

Abstract: A method and apparatus is provided which will provide over-pressure protection for an underground storage cavern by reducing the pressure of a pressurized gas stream originating from the an underground storage cavern to form a lower pressure gas stream, monitoring the pressure of a lower pressure gas stream and stopping the flow of the lower pressure gas stream to the pipeline should the pressure of the lower pressure gas stream exceed a threshold value.

Abstract: A method and apparatus is provided which will provide over-pressure protection for an underground storage cavern by reducing the pressure of a pressurized gas stream originating from the an underground storage cavern to form a lower pressure gas stream, monitoring the pressure of a lower pressure gas stream and stopping the flow of the lower pressure gas stream to the pipeline should the pressure of the lower pressure gas stream exceed a threshold value.

Abstract: An olefinically unsaturated monomer is stabilized by a retarder-containing composition which comprises a solvent and a quinone methide as a retarder.

Abstract: An olefinically unsaturated monomer is stabilized by a retarder-containing composition which comprises a solvent and a quinone methide as a retarder.

Abstract: An olefinically unsaturated monomer is stabilized by a retarder-containing composition which comprises a solvent and a quinone methide as a retarder.

Abstract: An olefinically unsaturated monomer is stabilized by a retarder-containing composition which comprises a solvent and a quinone methide as a retarder.

Abstract: A polymerization inhibitor for stabilizing olefinically unsaturated monomers containing at least one compound of formula (1) and/or (2) according to the invention. Stabilized monomer compositions.