Sampling and Online Analysis of Alkalis in Thermal Process Gases with a Novel Surface Ionization Detector

被引:35
|
作者
Wellinger, Marco [1 ,2 ]
Biollaz, Serge [1 ]
Wochele, Joerg [1 ]
Ludwig, Christian [1 ,2 ]
机构
[1] Paul Scherrer Inst, Gen Energy Res Dept, CH-5232 Villigen, Switzerland
[2] Ecole Polytech Fed Lausanne, ENAC IIE, CH-1015 Lausanne, Switzerland
关键词
BIOMASS COMBUSTION; COAL-COMBUSTION; RELEASE; PARTICLES; PYROLYSIS; EMISSION; METALS; SODIUM; GASIFICATION; SPECTROMETRY;
D O I
10.1021/ef200811q
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
When using biomass or waste as a feedstock for power production, alkalis are a major concern because of their negative effects on equipment. To investigate the release behavior of alkalis and the effectiveness of countermeasures, it is indispensable to quantify alkali emissions with a high time resolution (less than 1 min). This paper presents a newly developed alkali detector based on the principle of surface ionization. The detector includes a number of improvements compared to previous designs that enable a reproducible measurement of alkalis in heavily tar- and particle-laden product gases. Our redesigned alkali detector has demonstrated high sensitivity and improved characteristics for making measurements of tar- and particle-laden process gases. Using an ultrasonic nebulizer as a source for alkali aerosols, we could conduct a calibration of the alkali detector over 4 orders of magnitude. In combination with a dilution setup and a sampling lance, we could take online measurements of gasifier producer gas with a high degree of reproducibility and a high time resolution of 1 s. The measurements of product gas have proven the feasibility of using the detector for field measurements.
引用
收藏
页码:4163 / 4171
页数:9
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