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US 2022/0065529 A1Published application
Devices, systems, facilities, and processes for liquefied natural gas production
AssigneeNext Carbon Solutions, LLC
InventorsIvan Van der Walt, Ben Heichelbech, Alex Thompson, Vikrum Subra, Victor Fernandes, Michael Abegg
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Abstract
Devices, systems, and methods for liquefied natural gas production facilities are disclosed herein. A liquefied natural gas (LNG) production facility includes a liquefaction unit and a gas turbine. The liquefaction unit condenses natural gas vapor into liquefied natural gas. Fuel to the gas turbine contains at least about 90% hydrogen by volume.
Claims25
1:
- A process of producing liquefied natural gas (LNG), the process comprising:
- converting a natural gas vapor into an LNG;
- storing the LNG;
- generating a storage boil off gas (BOG) from the stored LNG;
- generating a combustion product;
- recovering heat from the combustion product;
- generating a CO2-rich stream by a capture unit from the combustion product;
- compressing the CO2-rich stream;
- and
- conveying the compressed CO2-rich stream towards a sequestration site.
7 more elements
2:
- The process of claim 1 comprising supplying at least a portion of the recovered heat to the generating of the CO2-rich stream.
3:
- The process of claim 1, wherein the compressing of the CO2-rich stream is performed by a compressor driven by at least one of an electric motor or a gas turbine.
4:
- The process of claim 1 further comprising loading the stored LNG to a marine vessel comprising a marine LNG storage tank and generating a loading BOG.
5:
- The process of claim 1, wherein the converting of the natural gas vapor into the LNG comprises cooling and condensation of the natural gas vapor by a liquefaction unit comprising a component selected from the group consisting of a refrigeration unit, a compressor, a heat exchanger, and combinations thereof.
6:
- The process of claim 1, wherein the converting of the natural gas vapor into the LNG is performed by a liquefaction unit comprising a compressor, the generating of the combustion product is performed by a gas turbine, the liquefaction unit is at least partially powered by the gas turbine in at least one configuration selected from the group consisting of
- the gas turbine being mechanically coupled to the compressor of the liquefaction unit, and
- the gas turbine being configured to drive an electric generator to provide electric power to the compressor of the liquefaction unit.
7:
- The process of claim 1, wherein the sequestration site is selected from the group consisting of an underground geological formation comprising an at least partially depleted hydrocarbon reservoir, a region on top of a seabed at a depth greater than about 3.0 kilometers below sea level, a region below the seabed, and combinations thereof.
8:
- The process of claim 1, wherein the converting of the natural gas vapor into the LNG is performed by a liquefaction unit, and the process further comprises compressing the storage BOG and sending the compressed storage BOG to the liquefaction unit.
9:
- The process of claim 1, wherein the compressing of the CO2-rich stream and the conveying of the compressed CO2-rich stream towards the sequestration site are performed by a sequestration compression unit, and the process further comprises sending a marine vessel tank gas from a marine LNG storage tank of a marine vessel to at least one of the sequestration compression unit or a fuel gas conditioning unit.
10:
- The process of claim 1 further comprising:
- processing a raw feed natural gas to generate an acid gas stream, a flash gas stream, and a purified natural gas stream, and sending the acid gas stream and/or the flash gas stream to the sequestration compression unit;
- and
- drying the purified natural gas stream to produce a dry purified natural gas stream.
1 more element
11:
- The process of claim 10 comprising supplying at least a portion of the recovered heat to at least one of the processing of the raw feed natural gas or the drying of the purified natural gas stream.
12:
- The process of claim 10 further comprising producing a liquid condensate product and a vapor product from the dry purified natural gas stream.
13:
- The process of claim 12 comprising supplying at least a portion of the recovered heat to the producing of the liquid condensate product and the vapor product.
14:
- The process of claim 12 further comprising a condensation storage tank configured to receive the liquid condensate product from the heavies removal unit and generate a condensate BOG.
15:
- The process of claim 1 further comprising producing hydrogen from the storage BOG by a hydrogen generation unit, wherein the generating of the combustion product is performed by a gas turbine from a fuel comprising at least 10% of the hydrogen produced by the hydrogen generation unit.
16:
- The process of claim 15, wherein the hydrogen generation unit comprises a steam reformer and/or an electrolysis unit.
17:
- The process of claim 15, wherein the compressing of the CO2-rich stream is performed by a sequestration compression unit comprising a compressor driven by steam from the hydrogen generation unit.
18:
- The process of claim 15 further comprising loading the LNG from the LNG storage tank to a marine vessel comprising a marine LNG storage tank and generating a loading BOG.
19:
- The process of claim 18 further comprising sending the loading BOG to the hydrogen generation unit and producing additional hydrogen from the loading BOG.
20:
- The process of claim 15 further comprising:
- processing a raw feed natural gas to generate an acid gas stream, a flash gas stream, and a purified natural gas stream, and sending the acid gas stream and/or the flash gas stream to the sequestration compression unit;
- and
- drying the purified natural gas stream to produce a dry purified natural gas stream.
1 more element
21:
- The process of claim 20 comprising supplying at least a portion of the recovered heat to at least one of the processing of the raw feed natural gas or the drying of the purified natural gas stream.
22:
- The process of claim 20 further comprising producing a liquid condensate product and a vapor product from the dry purified natural gas stream.
23:
- The process of claim 22 comprising supplying at least a portion of the recovered heat to the producing of the liquid condensate product and the vapor product.
24:
- The process of claim 22 further comprising generating a condensate BOG from the liquid condensate product.
25:
- The process of claim 24 further comprising sending the condensate BOG to the hydrogen generation unit and producing additional hydrogen from the condensate BOG.