Discuss the selection of the equalization times in PSA

The general number of pressure equalization cycles depends on the system pressure; the higher the pressure, the more cycles are required. Otherwise, the pressure will be high and the number of equalization cycles will be low; an excessive equalization pressure difference can cause damage to the molecular sieve. Additionally, the reverse pressure at the end will also increase, leading to a decrease in the extraction efficiency. However, a higher number of voltage equalization cycles results in more adsorption towers and programmable valves, leading to higher investment and a relatively more complex process. Therefore, a comprehensive consideration is needed during the design process.

1. Adsorption pressure 2. Selection of adsorbent 3. Requirements for purity and cleanliness of the product gas 4. Number of adsorption towers 5. Selection of venting pressure 6. Don’t assume that all companies use the same technology; especially those new to this industry, it’s crucial to choose a competent mentor carefully, as the mentor plays a vital role. As a means of competing in the industry, many companies with slightly inferior technology will say this.

There are definitely certain differences in the technologies used by different companies; even when things are made in accordance with standards, they may not be exactly the same.

Regarding the differences in technology, I think there are several scenarios; you might as well compare them: 1. Differences in technical proficiency levels； There are companies that simply copy the technology of other firms without having any own core technologies; the performance of their products is extremely poor, which leads the organizations that use them to think that all pressure swing adsorption companies are of the same standard as them (at least that’s what they claim) ； 2. Differences in technical solutions ； This is understandable (different numbers of towers, different pressure equalization methods, different desorption methods). 3. Differences in technical perspectives: Different outcomes are emphasized; some systems feature low power consumption, others lower investment costs, and yet others a high gas recovery rate – each having its own advantages. It is hoped that technological advancements in the industry will be beneficial to **.

It depends on the final voltage equalization effect and overall recovery rate, not on the number of voltage equalization attempts

In the field of carbon removal, the types of adsorbents available are more or less the same across different manufacturers (excluding those unscrupulous companies that use inferior products to deceive customers). The technical differences lie mainly in two aspects: the selection of process schemes and the implementation of control strategies. These are what truly determine the efficiency of the equipment’s operation. Some manufacturers claim that their processes are extremely advanced, insisting that the more times pressure equalization is performed, the better (which is not necessarily true; sufficient performance is what matters most – as the saying goes, “too much is as bad as too little”). On the other hand, they use inferior control systems and strategies, which causes problems for customers in actual production. PSA units rely on the periodic automatic opening and closing of various valves to carry out the various process steps, and a good process scheme requires a reliable automated control system to ensure its proper functioning.

I have not been working in the PSA gas production industry for long; I would appreciate it if experienced professionals could advise me on which books are useful for learning PSA technology! Thank you!!