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1. WO2022165450 - SUBSEA DEHYDRATION OF NATURAL GAS USING SOLID DESICCANT

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Publication Number WO/2022/165450
Publication Date 04.08.2022
International Application No. PCT/US2022/070086
International Filing Date 07.01.2022
IPC
B01D 53/26 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
26Drying gases or vapours
B01D 53/04 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
02by adsorption, e.g. preparative gas chromatography
04with stationary adsorbents
CPC
B01D 2256/245
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2256Main component in the product gas stream after treatment
24Hydrocarbons
245Methane
B01D 2259/40052
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2259Type of treatment
40Further details for adsorption processes and devices
40011Methods relating to the process cycle in pressure or temperature swing adsorption
40043Purging
4005Nature of purge gas
40052Recycled product or process gas
B01D 2259/40081
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2259Type of treatment
40Further details for adsorption processes and devices
40011Methods relating to the process cycle in pressure or temperature swing adsorption
40077Direction of flow
40081Counter-current
B01D 2259/402
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2259Type of treatment
40Further details for adsorption processes and devices
402using two beds
B01D 2259/403
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2259Type of treatment
40Further details for adsorption processes and devices
403using three beds
B01D 53/0407
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols,
02by adsorption, e.g. preparative gas chromatography
04with stationary adsorbents
0407Constructional details of adsorbing systems
Applicants
  • EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY [US]/[US]
Inventors
  • CULLINANE, John, Timothy
  • NORTHROP, P., Scott
Agents
  • KAISER, Iona, N.
  • JORDAN, Carey, C.
  • HARRISON, Jeremy, D.
Priority Data
63/142,74128.01.2021US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) SUBSEA DEHYDRATION OF NATURAL GAS USING SOLID DESICCANT
(FR) DÉSHYDRATATION SOUS-MARINE DE GAZ NATUREL À L'AIDE D'UN DÉSHYDRATANT SOLIDE
front page image
Abstract
(EN) Techniques described herein relate to a subsea dehydration system including two or more solid desiccant dehydration units. Each solid desiccant dehydration unit includes solid desiccant beds arranged as parallel pipes oriented substantially horizontally and packed with solid desiccant material. The solid desiccant dehydration units are configured to perform a cyclic dehydration process in which at least one solid desiccant dehydration unit performs an adsorption function for selectively adsorbing water from a wet natural gas stream, while at least one other solid desiccant dehydration unit simultaneously undergoes a regeneration function for desorbing adsorbed water from corresponding solid desiccant beds and cooling the corresponding solid desiccant beds to a suitable temperature prior to performing the adsorption function. Moreover, the subsea dehydration system is configured to periodically switch the direction of flow such that the solid desiccant dehydration units alternate between performing the adsorption function and undergoing the regeneration function.
(FR) Les techniques décrites dans la présente invention concernent un système de déshydratation sous-marine comprenant deux unités de déshydratation de déshydratant solide ou plus. Chaque unité de déshydratation de déshydratant solide comprend des lits de déshydratant solides disposés sous la forme de tuyaux parallèles orientés sensiblement horizontalement et emballés avec un matériau déshydratant solide. Les unités de déshydratation de déshydratant solide sont conçues pour effectuer un procédé de déshydratation cyclique dans lequel au moins une unité de déshydratation de déshydratant solide réalise une fonction d'adsorption pour adsorber de façon sélective de l'eau à partir d'un flux de gaz naturel humide, tandis qu'au moins une autre unité de déshydratation de déshydratant solide subit simultanément une fonction de régénération pour la désorption d'eau adsorbée à partir de lits de déshydratant solides correspondants et le refroidissement des lits de déshydratant solides correspondants à une température appropriée avant la réalisation de la fonction d'adsorption. De plus, le système de déshydratation sous-marine est conçu pour commuter périodiquement la direction d'écoulement de telle sorte que les unités de déshydratation de déshydratant solide alternent entre la réalisation de la fonction d'adsorption et la mise en œuvre de la fonction de régénération.
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