| Title | Temperature Stability Of 1,5-Naphthalene Disulfonate At Simulated Geothermal Conditions |
|---|---|
| Authors | Dashkevich, Yaroslav ., Mountain, Bruce ., Seward, Terry . and Winick, Jeffrey |
| Year | 2014 |
| Conference | New Zealand Geothermal Workshop |
| Keywords | tracer studies, naphthalene disulfonic acid, naphthalene sulfonic acid, NDS, NSA, experimental geochemistry. |
| Abstract | The thermal stability of 1,5-naphthalene disulfonate (1,5-NDS) has been investigated. It was subjected to a number of simulated geothermal environments in batch autoclave reactors. Experimental temperature was changed from 280 to 350℃. Exposure times were 10 and 40 hours. The results show strong dependence on the solution composition (salt concentration, pH and pOH). Comparison with published data shows lower 1,5-NDS stability when in isolation compared with a mixture of several naphthalene sulfonates. For most conditions no dependence on the initial tracer concentration is observed. Two decomposition mechanisms of pseudo-first order are suggested to explain 1,5-NDS behaviour. |