Optimization of Water Scrubbing Method for Enhancement of Biogas Quality through Base Solutions Addition

Abstract:

The addition of base NaOH and KOH solutions and the application of an air stone and a stirrer to develop turbulence in water scrubbing method were carried out to study the purification process of raw biogas. Various concentrations of the base solutions and constant stirrer speed was applied. The work results showed that the best performance in increasing CH₄ content, about 70% improvement, was reached with the addition of NaOH on 2% concentration. On the other hand, about 96% and 100% improvement for CO₂ and H₂S respectively were obtained under 2% NaOH addition coupled with a stirrer. The addition of base solutions was very effective to increase absorbent pH level, thus maintaining absorption process in longer duration and prevented saturation of absorbent. Moreover, the application of a stirrer in packed bed column further improved the biogas quality. The improvement was resulted from the generated biogas bubble and turbulence which led to prolong contact time between absorbent and biogas.

• Periodical: Applied Mechanics and Materials (Volume 836)
• Pages: 259-264
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.836.259
• Online since: June 2016
• Authors: Hendry Sakke Tira, Yesung Allo Padang, Tri Rachmanto, Ahmad Alfan Syahida
• Keywords: Base Solution, Biogas, Purification, Water Scrubbing

References

[1] H. S. Tira, A. Tsolakis, D. turner, J. M. Herreros, K. D. dearn, K. Theinnoi. M. L. Wyszynski, Influence of fuel properties, hydrogen, and reformate additions on diesel-biogas dual-fueled engine, Journal of Energy engineering, 140 (2014), pp.1-13.

DOI: 10.1061/(asce)ey.1943-7897.0000173

[2] L.V.A. Truong, N. Abatzoglu, A H2S reactive adsorption process for the purification of biogas prior to its use as a bioenergy vector, Biomass Bioenergy, 29 (2005), pp.142-151.

DOI: 10.1016/j.biombioe.2005.03.001

[3] J. I. Eze and K. E. Agbo, Maximizing the potentials of biogas through upgrading, American Journal of Scientific and Industrial research, 1(2010), pp.604-609.

DOI: 10.5251/ajsir.2010.1.3.604.609

[4] H. Naegele, J. Lindner, W. Merkle, A. Lemmer, T. Jungbluth, C. Bogenrleder, Effects of temperature, pH and O2 on the removal of hydrogen sulfide from biogas by external biological desulfurization in a full scale fixed-bed trickling bloreactor (FBTB), Int. Agric & Biol Eng, 6 (2013).

[5] Y. Santosh, T Sreekrishnan, S. Kohli, V. Rana, Enhancement of biogas production from solid substrates using different techniques - a review, Bioresources Technol, 95 (2004), pp.1-10.

DOI: 10.1016/j.biortech.2004.02.010

[6] H. S. Tira, Y. A. padang, Mirmanto, R. C. Mantiri, Effect of water volume and biogas volumetric flowrate in biogas purification through water scrubbing method, International Journal of Smart Material and Mechatronics, 1 (2014), pp.33-37.

DOI: 10.4028/www.scientific.net/amm.776.443

[7] H. S. Tira, Y. A. padang, Mirmanto, Hendriono, Improving biogas quality through circulated water scrubbing method, Applied Mechanics and Materials, 776 (2015), pp.443-448.

DOI: 10.4028/www.scientific.net/amm.776.443

[8] H. S. Tira, Y. A. padang, Mirmanto, T. Rachmanto, M. Wirawan, I. M. Nuarsa, M. Irwan, Reducing CO2 and H2S content through improved circulated water scrubbing method, Proceedings of 14th International conference on Quality in Research (QIR), August, 10-13, 2015, Indonesia.

DOI: 10.4028/www.scientific.net/amm.776.443

[9] M. Constant, H Naveau, Biogas: end use in the European community, Elsevier science Publising Co, New York, (1989).

[10] T. D. Biswas, A. R. S. Kartha, R. Pundarikakhadu, Removal of carbon dioxide from biogas, Proceedings of national symposium on biogas technology and uses, New Delhi, IARI, (1977).

[11] T. K. Bhattacharya, T. N. Mishra, B. Singh, Techniques for removal of CO2 and H2S from biogas, Proceedings 24th Annual Convention of ISAE, Akola, (1988).

[12] C. Robert, J. M. Reid, B. E. Prausnitz, The properties of gases and liquids, fourth ed., McGraw-Hill, Boston, USA, (1987).

[13] Biogas upgrading and utilization, Task 24: Energy from biological conversion of organic waste, IEA Bioenergy, (2014).

[14] L. A. Gevantman, Solubility of selected gases in water, (2013).

[15] T. M. McCollom, Methanogenesis as a potential source of chemical energy for primary biomass production by autotrophic organisms in hydrothermal systems on Europa, Journal of Geophysical Research, 104 (1999), p.30, 729-30, 742.

DOI: 10.1029/1999je001126