Modelling and simulation of multi-bed pressure swing adsorption processes

Machine learning–based optimization for hydrogen purification performance of layered bed pressure swing adsorption

“…18 Different adsorption bed numbers and pressure swing adsorption cycle steps are also important for hydrogen purification performance; the research shows that increasing the adsorption bed numbers can improve the hydrogen recovery. 19,20 The thermal effect on the PSA cycle cannot be ignored; effective thermal management is very important for hydrogen breakthrough curves and purification performance. [21][22][23] It can be seen that many scholars have done a lot of researches on the breakthrough curves and hydrogen PSA processes, but there are few studies on the optimization of PSA.…”

“…In order to make the purified hydrogen be used in fuel cell application, three different cyclic adsorption processes were applied by Golmakani et al You et al have improved the purification performance; the hydrogen recovery would increase by about 10% combining the vacuum step with the purging step called VPSA . Different adsorption bed numbers and pressure swing adsorption cycle steps are also important for hydrogen purification performance; the research shows that increasing the adsorption bed numbers can improve the hydrogen recovery . The thermal effect on the PSA cycle cannot be ignored; effective thermal management is very important for hydrogen breakthrough curves and purification performance …”

Biogas Steam Reforming in Wastewater Treatment Plants: Opportunities and Challenges

“…case of biogas steam reforming, although the abovementioned sources could give us an idea about the conditions used for this purpose, working at different pressures (from 8 to 65 bar), hydrogen content (from 55 to 90%) and with different impurities such as CO2, CH4, CO, C3H8 or C4H10, being a versatile technique to obtain high purity hydrogen (up to 99.9%) [55,56]. The feed steam could also contain vapor, which is a possibility after biogas steam reforming, and PSA conditions can admit operating temperatures close to ambient temperature, at around 20-40 °C.…”

“…The rest of the reagents (in unreacted form), apart from the products, can be easily managed to carry out other chemical routes. Even though there are many PSA units (from small to very large sized facilities) operating worldwide devoted to hydrogen purification from various feed sources (such as coke oven gas, refinery, methanol and ethylene exhaust gas, syngas coal gasifier and steam reformer synthesis gas), not many studies are specifically devoted to the specific case of biogas steam reforming, although the abovementioned sources could give us an idea about the conditions used for this purpose, working at different pressures (from 8 to 65 bar), hydrogen content (from 55 to 90%) and with different impurities such as CO 2 , CH 4 , CO, C 3 H 8 or C 4 H 10 , being a versatile technique to obtain high purity hydrogen (up to 99.9%) [55,56]. The feed steam could also contain vapor, which is a possibility after biogas steam reforming, and PSA conditions can admit operating temperatures close to ambient temperature, at around 20-40 • C.…”