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首页> 外文会议>The proceedings of AD 2007: Process control amp; compliance: analytical solutions >RAMAN PROCESS ANALYZER FOR in-situ AND REAL- TIME MEASUREMENT OF CHEMICAL COMPOSITION
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RAMAN PROCESS ANALYZER FOR in-situ AND REAL- TIME MEASUREMENT OF CHEMICAL COMPOSITION

机译：拉曼过程分析仪，用于化学成分的现场和实时测量

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摘要

A new process instrument design based on Raman Stokes scattering is described. The instrument quantifies species concentrations in liquid or gas production facilities at any point throughout a given process, from feedstock to exhaust. The Raman in-situ process analyzer (RPA) is an emerging tool for measuring chemical concentration in situ at the sampling point. The analyzer is comprised of an optical interface head with laser source, integrated detection optics, signal processing circuitry, custom calibration models for specific applications, and is integrated into a single package suitable for mounting directly at the pipe. The RPA was tested using several different concentrations of Chlorine (CI2), Oxygen (O2), and Carbon Dioxide (CO_2) in the gas phase and Bromine (Br_2), Hexane (C6H_(14)), and Carbon Tetrachloride (CCI_4) in the liquid phase. Nominal laser power was 370mW. Normalized to standard atmospheric pressure, the 3-sigma detection limits for CI_2, CO_2, and O_2, are 800ppm, 9000ppm, and 1.9%, respectively. For liquid measurements, mixtures of Br2 in hexane and CCI_4 were investigated and the three sigma detection limit for those measurements is approximately 60ppm. The RPA has been developed for process control at chemical production facilities. It is intended to replace process Gas Chromatographs (GC) and Fourier Transform Infrared spectrometers (FTIR) for cost sensitive process applications. Analyzers for at-line use in chemical manufacturing plants must operate safely, be robust and reliable, compact in size, and low cost. The RPA has been developed specifically to address these needs.
机译：描述了一种基于拉曼斯托克斯散射的新工艺仪器设计。在给定过程中，从原料到废气，该仪器可在液体或气体生产设施中的任意位置量化物种浓度。拉曼原位过程分析仪（RPA）是一种新兴的工具，用于在采样点处原位测量化学浓度。该分析仪由带有激光源的光学接口头，集成的检测光学器件，信号处理电路，针对特定应用的定制校准模型组成，并集成到适合直接安装在管道上的单个包装中。使用几种不同浓度的气相中的氯（CI2），氧气（O2）和二氧化碳（CO_2）和溴（Br_2），己烷（C6H_（14））和四氯化碳（CCI_4）来测试RPA。液相。标称激光功率为370mW。标准化为标准大气压，CI_2，CO_2和O_2的3-sigma检测极限分别为800ppm，9000ppm和1.9％。对于液体测量，研究了己烷中Br2和CCI_4的混合物，这些测量的3σ检测极限约为60ppm。 RPA已开发用于化工生产设施的过程控制。它旨在替代对成本敏感的过程应用的过程气相色谱仪（GC）和傅立叶变换红外光谱仪（FTIR）。用于化学生产工厂的在线分析仪必须安全运行，坚固可靠，尺寸紧凑且成本低廉。 RPA是专门为解决这些需求而开发的。

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