“…Asphaltene inhibitors are typically amphiphilic surfactant or dispersant-type molecules. Reported inhibitors include mono-substituted esters of glycerol (Breen, 2001), esters of sorbitan (Spans) (Breen, 2001), alkylamines (Subramanian et al, 2018b), alkylphenols (Chang and Fogler, 1994;Goual et al, 2014;Rogel and León, 2001;Wei et al, 2015), alkylbenzene sulfonates such as dodecylbenzyl sulfonic acid (Benayada and Rahmani, 1999;Chang and Fogler, 1994;Goual and Sedghi, 2015;León et al, 1999;Liu et al, 2015;Wei et al, 2015) and polymeric dispersants such as polyisobutylene succinimides (PIBS) (Breen, 2001;Hashmi et al, 2010;Manek and Sawhney, 1996;Marques et al, 2012;Wang et al, 2017). It has been theorised that resins, which are naturally occurring in crude oil, can stabilise asphaltenes (Acevedo et al, 1995;Kawanaka et al, 1989;Leontaritis and Mansoori, 1987;Pfeiffer and Saal, 1939;Porte et al, 2003;Soorghali et al, 2014), hence chemists may look to utilise these chemistries by finding synthetic analogues or by recycling / reintroducing natural resins (Khvostichenko and Andersen, 2010;Speight, 2004).…”