Investigation into the strength and source of the memory effect for cyclopentane hydrate

Can cyclopentane hydrate formation be used to screen the performance of surfactants as LDHI anti-agglomerants at atmospheric pressure?

“…(Sefidroodi et al, 2013). This method relies on forming hydrates (initiated adding a little pre-formed hydrate), melting the crystals to just above the equilibrium temperature as judged by visual observations, and then cooling and reforming the hydrates in the presence of the candidate AA.…”

Formation kinetics of cyclopentane–methane binary clathrate hydrate

“…It has been reported (Sloan and Koh, 2007) that the induction time can be reduced substantially if the hydrate slurry (from a prior hydrate formation experiment) is melted at a temperature only slightly above its melting temperature, and not heated to any higher temperature afterwards. This effect is commonly referred to as the "memory effect" (Vysniauskas and Bishnoi, 1983;Parent and Bishnoi, 1996;Takeya et al, 2000;Sefidroodi et al, 2013), and despite the doubt cast on its existence (Wilson and Haymet, 2010) and the ambiguous underlying mechanism (Zylyftari et al, 2014), it was found to be present in our experiments. A fresh mixture of CP and water pressurized to 2 MPa with CH 4 would not form any hydrate by itself even after 24 h of intense agitation (at 600 RPM) at 274 K (i.e.…”

An experimental study on the formation behavior of single and binary hydrates of TBAB, TBAF and TBPB for cold storage air conditioning applications

“…The residual structure of hydrate dissociation, as the source of the memory effect, was assumed to provide a site for mass transfer between the host and guest molecules. Such assumption was also conceived by other researchers [38,39].…”