Bioenergy recovery from landfill gas: A case study in China

doi:10.1007/s11783-009-0012-9

Front Envir Sci Eng Chin

2009, Vol. 3

Issue (1) : 20-31 https://doi.org/10.1007/s11783-009-0012-9

RESEARCH ARTICLE

Bioenergy recovery from landfill gas: A case study in China

Wei WANG¹(

), Yuxiang LUO¹, Zhou DENG²

1. Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China; 2. J&K China Cleaning Energy Technology Company Limited, Beijing 100085, China

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Abstract

Landfill gas (LFG) utilization which means a synergy between environmental protection and bioenergy recovery was investigated in this study. Pressure swing adsorption technology was used in LFG purification, and laboratory experiment, pilot-scale test, and on-site demonstration were carried out in Shenzhen, China. In the laboratory experiment, A-type carbon molecular sieve was selected as the adsorbent by comparison of several other adsorbents. The optimal adsorption pressure and adsorption time were 0.25 MPa and 2 min, respectively, under which the product generation rate was 4.5 m³/h and the methane concentration was above 90%. The process and optimization of the pilot-scale test were also reported in the paper. The product gas was of high quality compared with the National Standard of Compressed Natural Gas as Vehicle Fuel (GB18047-2000), when the air concentration in feed gas was under 10.96%. The demonstration project was composed of a collection system, production system, and utilization system. The drive performance, environmental protection performance, and economic feasibility of the product gas – as alternative fuel in passenger car, truck, and bulldozer – were tested, showing the feasibility technology for LFG utilization.

Keywords landfill gas (LFG) compressed purified landfill gas (CPLG) pressure swing adsorption (PSA) alternative vehicle fuel demonstration project

Corresponding Author(s): WANG Wei,Email:solid@tsinghua.edu.cn

Issue Date: 05 March 2009

Cite this article:

Wei WANG,Yuxiang LUO,Zhou DENG. Bioenergy recovery from landfill gas: A case study in China[J]. Front Envir Sci Eng Chin, 2009, 3(1): 20-31.

URL:

https://academic.hep.com.cn/fese/EN/10.1007/s11783-009-0012-9
https://academic.hep.com.cn/fese/EN/Y2009/V3/I1/20

Fig.1

Fig.2 Adsorption characteristics of the selected adsorbents

Fig.3 Relationship between saturated adsorption and inlet pressure

Fig.4 PSA penetration curves of A-type CMS

Fig.5 Concentration and recovery rate of methane in different operation conditions of the PSA experiments

Fig.6 PSA equipment in lab

Fig.7 Flowchart of pilot-scale test

Fig.8 PSA operation process of two columns

Tab.1 Different operation conditions of the pilot-scale test in Yulongkeng Landfill and Xiaping Sanitary Landfill

Fig.9 Influence of different operation conditions on product gas quality

Fig.10 Influence on recovery rate of CH in different operation conditions

Fig.11 Relations among the concentrations of CH and CO in product gas and the recovery rate of CH

Tab.2 Comparison between the quality of product gas and the standard

Fig.12 Relation between the air and CH concentration in feed gas and the quality of product gas

Fig.13 Flowchart of the PSA system

Tab.3 Testing results of CPLG

Tab.4 Comparison results of passenger car

Tab.5 Comparison results of truck

Tab.6 Comparison results of bulldozer

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