公开(公告)号：EP2570176A1

公开(公告)日：2013-03-20

申请号：EP12193089.5

申请日：2008-08-29

Applicant: SpectraSensors, Inc.

Inventor： Baum, Marc, M. ,  Moss, John ,  Feitisch, Alfred ,  Zhou, Xin ,  Liu, Xiang ,  Kwan, Alex

IPC: B01D53/52 ,  B01D53/58 ,  B01D53/68 ,  G01N30/02

CPC classification number: B01D53/685 ,  B01D53/42 ,  B01D53/52 ,  B01D53/58 ,  B01D2251/512 ,  B01D2251/602 ,  B01D2251/606 ,  B01D2259/40

Abstract: A method is disclosed which comprises maintaining a scrubber medium at a temperature in a range of -20°C to 85°C, the scrubber medium comprising nanoparticles of a reactive metal oxide material having first aerodynamic diameters of less than 250 nm that are adhered to carrier particles having second aerodynamic diameters in a range of 10 to 250 microns and that are inert relative to one or more background compounds, wherein a mass ratio of the reactive metal oxide to the carrier particles is in a range of 20% to 30%, and wherein the nanoparticles of the reactive metal oxide are adhered to the carrier particles by one or more of van der Waals and electrostatic forces. In a further step a gas mixture is contacted with the scrubber medium while the scrubber medium is maintained at the temperature, the gas mixture comprising a reactive compound and the one or more background compounds, the reactive compound comprising a gas-phase acid, the contacting causing the reactive compound to react with the reactive metal oxide material to convert the reactive compound and at least one metal oxide site on the nanoparticles to one or more metal-anion surface compounds. An apparatus, a composition and a refreshing method are also disclosed.

Abstract translation: 公开了一种方法，其包括将洗涤器介质保持在-20℃至85℃的温度范围内，所述洗涤器介质包含具有小于250nm的第一空气动力学直径小于250nm的反应性金属氧化物材料的纳米颗粒， 载体颗粒具有10至250微米范围内的第二空气动力学直径，并且相对于一种或多种背景化合物是惰性的，其中反应性金属氧化物与载体颗粒的质量比在20％至30％的范围内， 并且其中所述反应性金属氧化物的纳米颗粒通过一种或多种范德华力和静电力粘附到载体颗粒上。 在另一步骤中，气体混合物与洗涤器介质接触，同时洗涤器介质保持在该温度，气体混合物包含反应性化合物和一种或多种背景化合物，反应性化合物包含气相酸，接触 使反应性化合物与反应性金属氧化物材料反应，以将反应性化合物和纳米颗粒上的至少一个金属氧化物位置转化成一种或多种金属 - 阴离子表面化合物。 还公开了一种装置，组合物和刷新方法。

公开(公告)号：EP2373978A2

公开(公告)日：2011-10-12

申请号：EP09837058.8

申请日：2009-12-24

Applicant: SpectraSensors, Inc.

Inventor： HU, Xuejiao ,  FEITISCH, Alfred

IPC: G01N21/39 ,  G01N21/53

CPC classification number: G01N21/39 ,  G01N2201/022 ,  G01N2201/023 ,  G01N2201/0231

Abstract: Thermally controlled enclosures that can be used with gas analyzers are described. The enclosures incorporate one or more phase changing materials that buffer ambient and internal heat loads to reduce the power consumption demand of mechanical or electronic heating apparatus. Maintenance of gas analyzer equipment at a consistent temperature can be important to achieving stable and reproducible results. Related systems, apparatus, methods, and/or articles are also described.

公开(公告)号：EP2233915A1

公开(公告)日：2010-09-29

申请号：EP10006553.1

申请日：2004-02-11

Applicant: SpectraSensors, Inc.

Inventor： May, Randy

IPC: G01N21/35 ,  G01N21/39

CPC classification number: G01J3/4338 ,  G01N21/05 ,  G01N21/3504 ,  G01N21/3554 ,  G01N21/39 ,  G01N2021/354 ,  G01N2021/399

Abstract: A technique for detecting water vapor in natural gas is disclosed, wherein a light source (519), e. g., tunable diode laser, VCSEL, color center laser, or quantum cascade laser, emits light modulated at a given frequency and having a wavelength corresponding to a single absorption line where water molecules absorb light at a substantially greater level than methane, e. g., 920 to 960 nm, 1.877 to 1.901 micron, or 2.711 to 2.786 micron, into a sample of natural gas, the intensity of light transmitted through said sample is detected by a detector (523), and the water vapour content is determined by processing electronics (531) from said detected intensity using harmonic spectroscopy. Optionally, a second value for the water vapour content is simultaneously determined using a chemical sensor.

Abstract translation: 一种用于检测在天然气中的水蒸汽技术游离缺失盘，worin光源（519）中，e。 克，可调谐二极管激光器，VCSEL，色心激光器，或量子级联激光器，可发出在给定频率调制的光并且具有波长对应于其中的水分子在高于甲烷，例如显着更大的水平吸收光的单个吸收线。 克，920至960纳米，1877至1901微米，或2711到2786微米，成天然气的样品，的光反式通过所述样品mitted强度由检测器（523）检测到的，并且所述水蒸气含量是确定性矿洞 通过从所述强度处理电子器件（531），使用谐波光谱检测。 可选地，对于水蒸汽含量的第二值被同时确定使用化学传感器开采。

公开(公告)号：EP2122328A1

公开(公告)日：2009-11-25

申请号：EP08732189.9

申请日：2008-03-14

Applicant: SpectraSensors, Inc.

Inventor： XIANG, Liu ,  ZHOU, Xin ,  FEITISCH, Alfred ,  SANGER, Gregory, M.

IPC: G01N21/39 ,  G01N21/35 ,  G01J3/433

CPC classification number: G01N21/39 ,  G01J3/433 ,  G01N21/3504 ,  G01N2021/3513 ,  G01N2021/354 ,  G01N2021/399 ,  G01N2201/1218

Abstract: A system includes a light source, a detector, at least one pressure sensor, and a control unit. The light source emits light at a wavelength substantially corresponding to an absorption line of a target gas. The detector is positioned to detect the intensity of light emitted from the light source that has passed through the target gas. The pressure sensor detects the pressure of the target gas. The control circuit is coupled to the detector and the light source to adjust the modulation amplitude of the light source based on the pressure detected by the at least one pressure sensor. Related systems, apparatus, methods, and/or articles are also described.

公开(公告)号：EP2018539A1

公开(公告)日：2009-01-28

申请号：EP07775840.7

申请日：2007-04-19

Applicant: SpectraSensors, Inc.

Inventor： ZHOU, Xin

IPC: G01N21/35 ,  G01N21/39

CPC classification number: G01N21/3554 ,  G01J3/02 ,  G01J3/027 ,  G01J3/42 ,  G01J3/4338 ,  G01N21/031 ,  G01N21/0332 ,  G01N21/3504 ,  G01N21/39 ,  G01N33/0036 ,  G01N33/22

Abstract: Low concentrations of water vapor within a background of one or more hydrocarbon gases may be detected and quantified using a differential absorption spectrometer. A dehydrated sample of the gas is used as a background sample whose absorption spectrum allows elimination of absorption features not due to water vapor in the gas. Absorption spectra may recorded using tunable diode lasers as the light source, these lasers may have a wavelength bandwidth that is narrower than the water vapor absorption feature used for the differential absorption spectral analysis.