Which expert knows a method for determining chloride ions in natural gas?
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Which expert knows a method for determining chloride ions in natural gas? Please give me some advice. Could you give some suggestions? Email: nshc0239@163.com. Thank you all.
Series on Technical Supervision in the Petroleum Industry 9: Gas Analysis and Testing Techniques and Their Standardization http://bbs.hcbbs.com/viewthread.php?tid=159986&highlight=%CC%EC%C8%BB%C6%F8%B7%D6%CE%F6
I helped you search online to see if this works: http://www.chrom-china.com/qikan/manage/wenzhang/2002030073.pdf
The microcoulomb method can be used, allowing measurements as low as 0.1 ppm
Dude, could you be more specific? There are three difficulties in determining chloride ions in natural gas: first, what forms of chlorine are present in natural gas?； The second is how to collect various forms of chlorine, and the third is how to eliminate the interference of sulfur. I thank everyone for helping out my junior colleague.
The microcoulomb method involves burning the sample at high temperature in a pyrolysis tube, after which it enters an electrolytic cell to react with silver acetate; this method is used to analyze the total chlorine content, and small amounts of sulfur have no effect on the reaction.
Natural gas generally exists in gaseous form; under such conditions, it is doubtful whether ionized chlorine is present!
Original poster, I’ve found a sharing post from that forum for you; I’m not sure if it will be helpful to you. http://bbs.hcbbs.com/thread-205762-1-32.html
The difficulty lies in gas collection. Our factory has conducted analyses on this issue; we use a dilute alkaline solution (0.05 mol/l) for absorption, with two absorption bottles connected in series, along with a flow meter to measure the volume of gas being absorbed. The alkaline solution absorbs chloride ions, which are then transferred to a volumetric flask. Interferences are eliminated by using hydrogen peroxide for sulfides – 2 ml of hydrogen peroxide is added to 100 ml of the solution – and finally, titration is carried out using low-concentration silver nitrate.