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Novel gas measurement based on pressure triggered release cycles for biochemical methane potential tests
International Journal of Chemical Reactor Engineering ( IF 1.6 ) Pub Date : 2021-06-01 , DOI: 10.1515/ijcre-2020-0244
Ozan K. Bekmezci 1, 2 , Zehra Sapci-Ayas 3 , Deniz Ucar 4
Affiliation  

This study aims to present a novel gas counter and to demonstrate its suitability for biochemical methane potential tests. In this system, the gas to be measured is collected in a chamber enclosed with two one-way solenoid valves and the absolute pressure is continuously monitored. After a trigger pressure is reached, a portion of the gas is released and the amount of the released gas is calculated according to ideal gas law and recorded. Three iterations of the supervisory control and data acquisition unit were constructed and tested for BMP measurement. Although it can be further improved and variations are possible, the presented final version works with eight reactors simultaneously and the recommended maximum gas flow is 1.24 mL/min. For those reactors, the measured/theoretical BMP ratio was 65.3% with 4.2% standard uncertainty, which is subjectively acceptable. Therefore, it can be concluded that the concept is valid and applicable to BMP tests.

中文翻译:

用于生化甲烷潜力测试的基于压力触发释放循环的新型气体测量

本研究旨在提出一种新型气体计数器并证明其适用于生化甲烷潜力测试。在该系统中,待测气体被收集在一个由两个单向电磁阀封闭的腔室中,并持续监测绝对压力。达到触发压力后,释放一部分气体,根据理想气体定律计算并记录释放的气体量。为 BMP 测量构建并测试了监督控制和数据采集单元的三个迭代。虽然它可以进一步改进并且变化是可能的,但所呈现的最终版本可同时使用八个反应器,并且推荐的最大气体流量为 1.24 mL/min。对于这些反应器,测量/理论 BMP 比率为 65.3%,标准不确定度为 4.2%,这在主观上是可以接受的。因此,可以得出结论,该概念是有效的并且适用于 BMP 测试。
更新日期:2021-06-19
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