Product Introduction

Main Features

1、 Analysis of refinery gas
With the development of refining technology and the improvement of processing depth, the production of a large amount of by-product gas, namely refinery gas, during crude oil processing has also increased. The comprehensive utilization of refinery gas has become an important link in improving the economic efficiency of refineries. As is well known, refinery gas is a valuable raw material for the production of petrochemical products, and understanding the composition of refinery gas is a prerequisite for comprehensive utilization. Therefore, establishing and improving analytical methods for refinery gas is of great significance. The main components of refinery gas include hydrogen, C1~C5 alkanes, C2~C4 alkenes, and a small amount of C5 alkanes, alkenes, and some impurities such as H2S, CO, CO2. In some special processing processes, dienes and a small amount of alkynes are also produced. With the rapid development of gas chromatography, its role in the analysis of refinery gas components has become increasingly evident.
2、 Analysis of Gas
Natural gas, liquefied gas, and coal gas (including artificial gas, coke oven gas, blast furnace gas, converter gas, water gas, semi water gas, etc.) are gases closely related to people's production and life, widely used in household gas, petrochemicals, metallurgy, fine chemicals, and other fields. Therefore, the calculation of its content (especially calorific value) is still important. Gas chromatography provides the best solution, relying on chromatographic columns to separate complex components and using high-sensitivity detectors for quantification. Within a few minutes, the content (calorific value) can be accurately calculated.

3、 Specific analysis

Refinery gas analysis gas chromatograph (recommended for petrochemical industry) GC-1690

The GC1690 gas chromatograph is equipped with 3 valves and 4 columns, a hydrogen flame ionization detector (FID), and a thermal conductivity detector for refinery gas analysis or natural gas analysis. This system uses dual channel analysis to divide a separation problem into two parts. AL2O3 PLOT capillary column/FID channel is used to analyze hydrocarbons of C1 to C8. H2, O2, N2, CO, CO2, CH4, and H2S are separated by PLOT Q column and molecular sieve column, respectively, and detected by TCD. One injection can complete the full analysis of refinery gas composition.

Analysis chromatogram of refinery gas with three valves and four columns

Figure 1 FID channel chromatogram of three valve four column refinery gas analysis

1 methane 2 ethane 3 ethylene 4 propane 5 propylene 6 isobutane 7 n-butane 8 trans-2-butene 9 1-butene 10 isobutene 11 cis-2-butene 12 isopentane 13 1,3-butadiene

Figure 2 TCD channel chromatogram of three valve four column refinery gas analysis

14 Carbon dioxide 15 Valve switching signal 16 Hydrogen 17 Oxygen 18 Nitrogen 19 Methane 20 Carbon monoxide

Process diagram of refinery gas three valve four column system

Figure 3 Process diagram of three valve and four column system for refinery gas analysis