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The Basic Technologies of Mass Transfer and Their Progress in the Field of Upgrading Biogas

机译：传质的基本技术及其在沼气升级领域的进展

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摘要

Biogas is a gaseous mixture which is produced by the anaerobic digestion of organic matter. Biogas cleaning and modification of the composition means a decrease in the content of CO_2, an increase in CH_4 and the removal of undesirable components. The ratio between CH_4 and CO_2 is important for energy (and economic) values. Undesirable components have a negative effect on the technological use of biogas. It is possible to produce gas with 80 - 99.9 vol. methane % by cleaning and upgrading the biogas. This gas is called biomethane in order to highlight its non-fossil origin. Basic technologies of mass transfer, such as absorption and adsorption (or a combination of these processes - applied in a membrane), are used for cleaning biogas. The basic description and progress of these processes in recent years is described in the text as well as a summary of their advantages and disadvantages.
机译：沼气是一种有机混合物的厌氧消化产生的气体混合物。沼气的清洁和组成的改性意味着减少了CO_2的含量，增加了CH_4并去除了不良成分。 CH_4与CO_2之间的比率对于能源（和经济）值很重要。不良成分会对沼气的技术使用产生负面影响。可以产生80-99.9 vol。清洁和升级沼气产生的甲烷百分比。这种气体称为生物甲烷，目的是突出其非化石来源。传质的基本技术，例如吸收和吸附（或这些过程的组合-应用于膜），用于清洁沼气。本文对这些过程的基本描述和进展进行了介绍，并对其优缺点进行了概述。

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