High-Performance Kinetic Hydrate Inhibition with Poly(<i>N</i>-isopropyl methacrylamide) and Triisopentylamine Oxide─Surprising Concentration-Dependent Results
نویسندگان
چکیده
Kinetic hydrate inhibitors (KHIs) are mostly used to prevent the deposition of gas hydrates in and condensate production flow lines. The main component a KHI formulation is water-soluble polymer, blended with solvents other synergists boost performance. performance limit terms subcooling factors restricts application range KHIs. Earlier, we reported on synergetic trialkylamine oxides polyalkyl(meth)acrylamides using high-pressure steel rocking cell experiments. In particular, blends poly(N-isopropyl methacrylamide) (PNIPMAm) isobutyl glycol ether (iBGE) triisopentylamine oxide (TiPeAO) gave exceptional performance, better than what have seen for any blend so far. Therefore, it important evaluate limitations this KHI. Here, report results more detail. cloud point decreased increasing salinity (0–15 wt % NaCl), but remained soluble, giving excellent even at highest brine concentration. We also varied concentration PNIPMAm/TiPeAO from 250 5000 ppm deionized water slow constant cooling (SCC) tests both natural mixture [synthetic (SNG)] methane gas. A unique concentration-dependent was discovered, wherein greatly above about 1500–2000 ppm, possibly due aggregation polymer amine oxide. This observed SCC SNG methane, phenomenon being pronounced methane. addition, an unusual double pressure drop PNIPMAm TiPeAO. study underlines fact that overdosing components synergistic can sometimes lead detrimental effects
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ژورنال
عنوان ژورنال: Energy & Fuels
سال: 2023
ISSN: ['1520-5029', '0887-0624']
DOI: https://doi.org/10.1021/acs.energyfuels.2c03963