Six bed pressure swing adsorption process operating in normal and turndown modes
First Claim
1. A pressure swing adsorption process for separating a pressurized supply feed gas containing one or more strongly absorbable component from at least one less strongly absorbable product gas component in a six bed adsorbent system to produce a continuous stream of product gas enriched in the less strongly absorbable component and a stream of offgas that is enriched in the strongly absorbable components, wherein the duration of lowest pressure equalization down and first blowdown step is less than 15% of the teed time, and the process cycle has at least eighteen steps including (bur bed-to-bed equalization steps.
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Abstract
The present invention relates to a six bed pressure swing adsorption (PSA) system utilizing new and advanced cycles to obtain enhanced hydrogen recovery from a hydrogen containing feed gas (i.e., synthesis gas). In one such cycle each of the six beds has four pressure equalization steps, and at least one of the beds is receiving and processing said feed gas to obtain a hydrogen product gas (i.e., a 6-1-4 cycle).
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14 Claims
- 1. A pressure swing adsorption process for separating a pressurized supply feed gas containing one or more strongly absorbable component from at least one less strongly absorbable product gas component in a six bed adsorbent system to produce a continuous stream of product gas enriched in the less strongly absorbable component and a stream of offgas that is enriched in the strongly absorbable components, wherein the duration of lowest pressure equalization down and first blowdown step is less than 15% of the teed time, and the process cycle has at least eighteen steps including (bur bed-to-bed equalization steps.
- 12. A pressure swing adsorption process for separating a pressurized supply feed gas containing one or more strongly adsorbable component from at least one less strongly adsorbable product gas component in a five bed adsorbent system to produce a continuous stream of product gas enriched in the less strongly adsorbable component and a stream of offgas that is enriched in the strongly adsorbable components, wherein the duration of lowest pressure equalization down and first blow down step is less than 15% of the feed time, and the process cycle has at least fifteen steps including three bed-to-bed equalization steps.
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14. A pressure swing adsorption process for separating a pressurized supply feed gas containing one or more strongly adsorbable component from at least one less strongly absorbable product gas in a six bed adsorbent system where the process cycle has eighteen steps including three bed-to-bed equalizations steps, while two of the beds are in production, where the duration of lowest pressure equalization down and first blowdown step is less than 15% of the feed time, in accordance to following cycle chart:
Specification