# Experimental Setup and Graphical User Interface for Zero-Length Column Chromatography
## 8 Conclusions  
The designed system can measure parameters that characterize the adsorbate-adsorbent equilibrium, as well as the diffusion coefficient of pure components and mixtures. The selected case studies showed that the data obtained reproduce those reported using other techniques. The developed GUI can be easily modified to incorporate other components, such as TCD or mass detectors. The GUI also allows experiments with mixtures without using a mass spectrometer. It does not replace it, however, it allows test simple isotherms and transport models of mixtures on adsorbents with a significantly lower investment than that required by a mass spectrometer. These system features significantly reduce measurement time and costs. In this sense, the proposed system is more versatile than most of conventional volumetric and gravimetric systems. Figure 9: Desorption curves of Basolite® C300 at different methane and ethane flow rates at 298 kelvin. **Supplementary Materials:** The following supporting information can be downloaded at: [[https://www.mdpi.com/article/10.3390/app12136694/s1](https://www.mdpi.com/article/10.3390/app12136694/s1)]([https://www.mdpi.com/article/10.3390/app12136694/s1](https://www.mdpi.com/article/10.3390/app12136694/s1)), Table S1: Analog connectors of Mass Flow Controller Z512; Figures S1, S2 and S3: Calibration curves for methane, ethane and helium; Figure S4: (a) Signal as acquired from GC-8A shimadzu. (b) The response curve show the representative ZLC normalized curve; Figure S5: (a) Comparison between the empty column and zeolite. (b) Study of Blank response with and without slice; Figures S6 and S7: LabView graphical code; Table S2: Physical properties of zeolite 5A; Figure S8: SEM micrograph of Zeolite 5A powder and particle size distribution; Figure S9: (A) Infrared spectra and (B) Thermogravimetric curve of zeolite 5A; Table S3: Physical properties of Basolite C300; Figure S10: SEM micrograph of Basolite C300 powder and particle size distribution; Figure S11: (A) Infrared spectra and (B) Thermogravimetric curve of Basolite C300; Figures S12 and S13: ZLC response curves at different purge rates for methane and ethane on Basolite C300; Figures S14, S15, S16 and S17: Desorption curves for methane and ethane on zeolite 5A at different purge rates; Figure S18: Comparison of the adsorbent capacity of Zeolite 5A and Basolite C30; Table S4: Standard data for peak area calculation; Figure S19: Standard calibration curve for methane and ethane or peak area calculation. References [20; 21; 22; 38; 39; 51; 52; 53; 54; 55; 56] are cited in the supplementary materials. **Author Contributions:** Conceptualization, J.V.-B., J.B. and P.M.-O. ; methodology, J.V.-B., J.B. and P.M.-O. ; software, P.M.-O. and J.V.-B. instrumentation, J.V.-B. and J.B.; validation, J.B.; formal analysis, J.B., U.T.-H. and J.V.-B. ; research, J.V.-B. and J.B.; experimentation, J.V.-B. and J.B. Experimentation, J.V.-B. and D.A.-A. ; resources, J.B.; data curation, J.V.-B. and J.B.; writing and preparation of the original draft, J.V.-B. and J.B.; writing, revising and editing, J.V.-B., U.T.-H. and J.B.; supervision, J.B.; project management, J.B.; fund acquisition, J.B. All authors have read and agree with the published version of the manuscript. **Funding:** This research was funded by PAPIIT under project IG100618. **Institutional Review Board Statement:** Not applicable. **Informed Consent Statement:** Not applicable. **Data Availability Statement:** The GUI code is available free of charge to anyone who requests it via email to the authors. **Acknowledgments:** The authors thank the financial support provided by DGAPA-UNAM through PAPIIT project IG100618 and by the National Council for Science and Technology (CONACyT). In memory of [PERSON] for sharing his knowledge and time dedicated to this work. We also thank the technical support of: [PERSON], [PERSON], [PERSON], [PERSON] and [PERSON]. **Conflicts of Interest:** The authors declare no conflict of interest.