用于生产生物甲烷的垃圾填埋气成分的表征

M. Calero, M. Martín-Lara, G. Blázquez, S. Arjandas, A. Pérez
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引用次数: 0

摘要

生物甲烷和其他可再生气体将使完全可再生能源系统蓬勃发展。生物甲烷具有与天然气相似的特性,因此它可以注入现有的天然气基础设施或用作运输的生物燃料。此外,它的使用意味着减少温室气体排放和对化石燃料的依赖。这项工作是LIFE堆填区生物燃料项目的一部分,该项目旨在实施一个基于新技术的成本效益系统,以改善堆填区沼气的回收和生产高质量的生物甲烷,供车辆使用。在第一阶段,对所产生的沼气进行了全面的表征。沼气由位于西班牙格拉纳达Alhendin的城市固体废物处理厂ecoccentral生产。测定了沼气的组成及主要理化参数。发现不同采样点的沼气成分存在差异。沼气主要由甲烷组成,含量在50%至63%之间,二氧化碳含量约为40%。其余成分主要为O2, O2含量在2%以下,N2含量在15% ~ 7%之间。总硅氧烷含量小于3.0 mg/Nm3。对这种沼气成分的了解对其转化为生物甲烷的升级程序的发展具有决定性作用。
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CHARACTERIZATION OF LANDFILL GAS COMPOSITION FOR THE PRODUCTION OF BIOMETHANE
Biomethane and other renewable gases will enable to thrive on a fully renewable energy system. Biomethane has similar qualities to natural gas, so it can be injected into existing natural gas infrastructure or used as a biofuel for transport. Also, its use means a reduction in greenhouse gas emissions and dependence on fossil fuels. This work is part of the LIFE LANDFILL BIOFUEL project that aims to implement a cost-effective system based on new techniques to improve the recovery of landfill biogas and the production of biomethane with quality for vehicular use. In a first stage a complete characterization of the biogas produced has been carried out. Biogas is produced at the municipal solid waste treatment plant Ecocentral, located in Alhendin, Granada (Spain). The composition of the biogas as well as its main physical and chemical parameters has been determined. Differences in the composition of the biogas with the sampling point were found. Biogas consists mainly of methane with a content varying between 50% and 63% and carbon dioxide with a content of approximately 40%. The rest of the components are mainly O2 with content below 2% and N2 content between values below 15% and values arround 7%. The total siloxane content has been less than 3.0 mg/Nm3. The knowledge of the composition of this biogas has been decisive for the development of the upgrading procedure for its conversion to biomethane.
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