Integrated PTSA/membrane method and system for H2S and CO2 removal from biogas
US10450522B2 · kind B2 · utility
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Key dates
| Filing date | Dec 3, 2018 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Dec 3, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P30/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Biogas containing H2S and CO2 is upgraded by removing H2S using PTSA and CO2 using two stages of gas separation membranes. The first stage permeate may optionally be used a regeneration gas stream. The second stage permeate may optionally be used a cool down gas stream. The PTSA unit includes two or more adsorbent beds each selective for water, VOCs, and H2S over CO2 and for H2S over methane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.