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Biogas purification FAQ

What are the differences in applicable operating conditions between PSA and cryogenic air separation?
What are the differences in applicable operating conditions between PSA and cryogenic air separation?
Jun 16, 2026
Single equipment of Duer air separation system
Single equipment of Duer air separation system
Jun 08, 2026
What is the principle of return slop nitrogen removing frozen water and carbon dioxide?
What is the principle of return slop nitrogen removing frozen water and carbon dioxide?
May 29, 2026
How can one determine whether the molecular sieve heating and regeneration process in an air separation unit is thorough?
How can one determine whether the molecular sieve heating and regeneration process in an air separation unit is thorough?
May 19, 2026
How to judge whether the pressure at booster end of expander of air separation equipment is normal?
How to judge whether the pressure at booster end of expander of air separation equipment is normal?
May 11, 2026
What are the causes for abnormal pressure at the boosting end of air separation expander?
What are the causes for abnormal pressure at the boosting end of air separation expander?
Apr 29, 2026
What precautions shall be taken for the regulation of excess oxygen in the air separation unit?
What precautions shall be taken for the regulation of excess oxygen in the air separation unit?
Apr 23, 2026
How to blast and purge the pressure pipe
How to blast and purge the pressure pipe
Apr 15, 2026
What is the reason why there may be multiple peaks in the cold blowing curve of the molecular sieve purifier of the air separation equipment during regeneration
What is the reason why there may be multiple peaks in the cold blowing curve of the molecular sieve purifier of the air separation equipment during regeneration
Apr 07, 2026
What is the oxygen internal compression process
What is the oxygen internal compression process
Mar 27, 2026
Why only cryogenic air separation equipment can be selected for large industrial gas?
Why only cryogenic air separation equipment can be selected for large industrial gas?
Mar 19, 2026
What should be paid attention to when adjusting the air separation equipment when oxygen is abundant and oxygen production needs to be reduced
What should be paid attention to when adjusting the air separation equipment when oxygen is abundant and oxygen production needs to be reduced
Mar 11, 2026
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DEAR News
Learn more DEAR news
Good News | DEAR Air Separation is Selected as a National Key "Little Giant"
2026.09.24
Overseas Good News | DEAR Air Separation's Indonesia Project Standby System Achieves Successful Preceding Gas Supply and Smooth Oxygen Output
2026.08.25
Warm Graduation Season, Care Accompanies Growth | DEAR Air Separation Presents Exclusive Admission Gifts to Employees' Children
2026.08.14
Deliver Coolness in Sweltering Heat, Warm Craftsmen with Care — The Federation of Trade Unions of Shunhe Hui District Visits DEAR Air Separation to Carry out Summer Condolence Activities
2026.08.06
DEAR Air Separation Signs Intelligent Integrated Gas Supply Island Project in Partnership with Middle East Qiudanwei Steel, Setting a New Benchmark for Overseas Gas Supply Strategy
2026.07.22
African Dr. Wali and His Delegation Visit DEAR Air Separation to Jointly Explore New Opportunities for International Cooperation
2026.07.17
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