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US 9,428,696 B2Granted
Process for reforming hydrocarbons and process for starting up a gas-to-liquid process
AssigneeHaldor Topsoe A/S
InventorPer Juul Dahl
Life of this patent
Estimating the term…
Abstract
The invention relates to a process for the production of synthesis gas by the use of autothermal reforming or catalytic partial oxidation in which, after removal of water, effluent gas from the ATR or CPO is recycled to the feed of the ATR or CPO.
Claims15
A process for the production of synthesis gas from a hydrocarbon feedstock comprising:
- adding steam to the hydrocarbon feedstock to form a mixture of hydrocarbons and steam,
- passing said mixture through an autothermal reforming stage (ATR) or catalytic partial oxidation (CPO) stage and withdrawing a stream of hot effluent synthesis gas from the ATR or CPO,
- removing water from said hot effluent synthesis gas to form a dehydrated synthesis gas, and
- directly recycling at least a portion of said dehydrated synthesis gas into the hydrocarbon feedstock or into said mixture of hydrocarbons and steam, and without passing said dehydrated synthesis gas through a carbon-dioxide removal in the recycle, in which the molar ratio of dehydrated synthesis gas to mixture of hydrocarbons and steam is 0.1 to 2.5.
1 more element
A method for starting up a gas-to-liquid (GTL) process comprising:
- adding steam to a hydrocarbon feedstock to form a mixture of hydrocarbons and steam,
- passing said mixture through an autothermal reforming stage (ATR) or catalytic partial oxidation (CPO) stage and withdrawing a stream of hot effluent synthesis gas from the ATR or CPO,
- removing water from said hot effluent synthesis gas to form a dehydrated synthesis gas,
- directly recycling at least a portion of said dehydrated synthesis gas into the hydrocarbon feedstock or into said mixture of hydrocarbons and steam without passing said dehydrated synthesis gas through a carbon-dioxide removal in the recycle, and in which the molar ratio of dehydrated synthesis gas to mixture of hydrocarbons and steam is 0.1 to 2.5, and
- subsequently passing at least part of the dehydrated synthesis gas as feed to downstream GTL process and shifting from recycling dehydrated synthesis gas to recycling off-gas.
2 more elements
Dependencies are inferred from the claim text.