A simulation study for the upgrading of biogas using aqueous ammonia
Biogas upgrading process is usually performed for the removal of impurity gases (mainly carbon dioxide) other than methane from the biogas mixture. Being operated at high pressure and low temperature, both physical and chemical conventional upgrading methods lack energy efficiency. While a high pr...
| Main Authors: | , , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
Kulliyah of Engineering, International Islamic University Malaysia
2016
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/52169/ http://irep.iium.edu.my/52169/ http://irep.iium.edu.my/52169/8/52169.pdf |
| Summary: | Biogas upgrading process is usually performed for the removal of impurity gases (mainly carbon dioxide)
other than methane from the biogas mixture. Being operated at high pressure and low temperature, both
physical and chemical conventional upgrading methods lack energy efficiency. While a high pressure is used
in the most common physical process; the high pressurized water scrubbing method, the widely spread
chemical method of amine scrubbing is operated at high temperature gradient between the absorption and
regeneration steps. In the current study, biogas upgrading using aqueous ammonia is proposed to replace the
other conventional methods. An improved process of aqueous ammonia scrubbing operated at ambient or
near ambient temperature and pressure is discussed for the purpose of removing carbon dioxide from biogas.
A flow diagram for the process was built using the Aspen Hysys software provided by Aspen Tech®. The
simulation results have shown that the proposed process, due to the high purity methane produced and being
operated at ambient temperature and pressure, has a high potential in replacing the conventional upgrading
methods. |
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