Methane recovery in a combined amine absorption and gas steam boiler as a self-provided system for biogas upgrading

Huijuan Gong, Zezhi Chen, Huiqiang Yu, Weili Wu, Weixing Wang, Honglei Pang and Mengfan Du

Energy, 2018, vol. 157, issue C, 744-751

Abstract: Biogas, which primarily consists of methane (CH4) and carbon dioxide (CO2), is a renewable energy carrier, and can be upgraded to a natural gas substitute after removing trace impurities and CO2. Among the various CO2 separation technologies, amine absorption is generally considered to be energy intensive as regenerating the rich solution need additional heat to strip CO2. However, it could hardly be found the related data concerning energy consumption of biogas upgrading projects adopting amine absorption. In this work, a pilot biogas upgrading project with combined amine absorption unit and gas steam boiler was established with treatment capacity of 300 Nm3/h feed biogas. The major energy for operating this biogas upgrading project was self-provided through combustion a fraction of the biogas to generate steam for regenerating rich absorbent. Operation results showed that, besides much higher CO2 removal efficiency (>99.5%), CH4 recovery of this project attained around 89.0%, which was higher than that of several biogas upgrading projects using one-stage PSA or two-stage membrane permeation technologies. Based on the results of this work, it proves that amine absorption is a highly effective technique for CO2 removal in biogas upgrading projects, and its energy consumption is not higher than other technologies.

Keywords: Biogas upgrading; Amine absorption; Methane recovery (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544218310570
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:157:y:2018:i:c:p:744-751

DOI: 10.1016/j.energy.2018.06.004

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().