Wannan aikin wani na'urar dawo da iskar gas mai siffar styrene ne da AIR LIQUIDE (Shanghai Industrial Gas Co., Ltd.) ta samar. Tana amfani da fasahar shaƙar iskar hydrogen mai matsi da aka ɗora don dawo da hydrogen daga iskar styrene mai samar da styrene. Ƙarfin sarrafawa na na'urar shine 2,500 Nm³/h, tana sarrafa iskar tyrene daga shukar styrene. Manyan abubuwan da ke cikin wannan iskar gas sune hydrogen, benzene, toluene, ethylbenzene, da sauran mahaɗan halitta. Tsarin yana ɗaukar tsarin haɗin gwiwa na "pre-magani + PSA". Na'urar kafin magani ta ƙunshi matakai kamar danshi da shaƙa, cire mahaɗan benzene daga iskar tyrene yadda ya kamata da kuma kare mai shaƙawar PSA. Na'urar PSA tana amfani da tsarin hasumiya shida, tare da tsarkin hydrogen na samfurin ya kai kashi 99.5%, kuma ƙimar dawo da hydrogen ya wuce kashi 80%. Yawan dawo da hydrogen na yau da kullun shine 60,000 Nm³. An tsara na'urar a cikin tsari mai hawa sanda, tare da ƙera kuma an gwada tsarin gaba ɗaya a masana'anta, kuma yana buƙatar haɗa bututun shiga da fita da ayyukan amfani a wurin. Lokacin shigarwa makonni 2 ne kawai. Nasarar amfani da wannan na'urar da aka ɗora sandar tana ba da mafita mai sassauƙa da inganci don amfani da albarkatun iskar gas a cikin kamfanonin mai, musamman dacewa da yanayi mai ƙarancin ƙasa ko buƙatar amfani da shi cikin sauri.