Air Products and Chemicals, Inc.

Galip Hakan Guvelioglu

Paul Higginbotham

John Eugene Palamara

Vincent White

Eugene S Genkin

David Anthony Zagnoli

Kerry Andrew Scott

Impurities that are less volatile than carbon dioxide, e.g. hydrogen sulfide, are removed from crude carbon dioxide by processes involving distillation of said crude carbon dioxide in a distillation column system operating at super-atmospheric pressure(s) to produce carbon dioxide-enriched overhead vapor and bottoms liquid enriched with said impurities. Where such processes involve a single heat pump cycle, significant savings in power consumption are realized when the distillation column system is re-boiled by at least partially vaporizing liquid in or taken from an intermediate location in the column system.

Purification of carbon dioxide

In a process for separating at least one 'heavy' impurity such as hydrogen sulfide from crude carbon dioxide comprising significant quantities of at least one 'light' impurity such as non-condensable gases, involving at least one heat pump cycle using carbon dioxide-containing fluid from the process as the working fluid, the &#x201c;light&#x201d; impurity is removed from the crude carbon dioxide and carbon dioxide is subsequently recovered from the removed &#x201c;light&#x201d; impurity, thereby improving overall carbon dioxide recovery and efficiency in terms of energy consumption.

A method for generating hydrogen and/or syngas in a production facility where little or no export steam is produced. Most or all of the steam produced from the waste heat from the process is used in the steam-hydrocarbon reformer. Reformed gas is passed to a pressure swing adsorption system for Hpurification. In the method, COis removed from the pressure swing adsorber residual gas prior to recycling the residual gas to the reformer for use as feed and as fuel. Plant efficiencies using the method and prior art-type methods are compared.

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Macungie, PA, United States of America

Galip Hakan Guvelioglu