Modeling and simulation of high pressure water scrubbing technology applied for biogas upgrading

被引:80
作者
Cozma, Petronela [1 ]
Wukovits, Walter [2 ]
Mamaliga, Ioan [3 ]
Friedl, Anton [2 ]
Gavrilescu, Maria [1 ,4 ]
机构
[1] Gheorghe Asachi Tech Univ Iasi, Dept Environm Engn & Management, Iasi 700050, Romania
[2] Vienna Univ Technol, Inst Chem Engn, A-1060 Vienna, Austria
[3] Gheorghe Asachi Tech Univ Iasi, Dept Chem Engn, Iasi 700050, Romania
[4] Acad Romanian Scientists, Bucharest 050094, Romania
关键词
Biogas upgrading; CO2 removal efficiency; Gas absorption; Gas solubility; High pressure water scrubbing; Process simulation; SWING ADSORPTION PROCESS; CARBON-DIOXIDE; CO2; REMOVAL; ABSORPTION; ENERGY; OPTIMIZATION; SOLUBILITY; SEPARATION; MIXTURE; METHANE;
D O I
10.1007/s10098-014-0787-7
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Depending on the end of use, the quality of biogas must be upgraded in order to utilize the maximum amount of energy necessary for proper applications. Upgrading biogas refers to the increase of methane concentration in product gas by removal of CO2, which increases its heating power. Several treatment technologies are available for biogas upgrading: high pressure water scrubbing (HPWS), pressure swing adsorption, membrane separation, chemical absorption, and gas permeation. Water absorption based on the physical effect of dissolving gases in liquids (HPWS) is a well-known technology and the most effective upgrading process, since provides a simultaneous removal of CO2 and H2S. This could ensure an increasing methane concentration and energy content per unit volume of biogas. In spite of this, few studies are published on biogas upgrading using pressurized water technology. In order to elucidate the performance of HPWS technology at industrial scale with the possibility of water regeneration and recirculation, effects of different operating parameters on the removal of undesired components from biogas were examined, based on modeling and simulation tools. For simulation, the commercial software tool Aspen Plus was applied. Equilibrium model was applied for simulating the absorption process. The simulation results were validated with experimental data from the literature. The results are summarized in terms of system efficiency, expressed as CH4 enrichment, methane loss, and CO2 removal. Finally, new data which can be further applied for scale-up calculations and techno-economic analysis of the HPWS process are provided.
引用
收藏
页码:373 / 391
页数:19
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