“…Brown et al (2007),Goyal et al (2008),Kirubakaran et al (2009), Kobayashi et al (2008,Mitchell et al (1995),Skoulou and Zabaniotou (2007),Walter and Llagostera (al. (2007),Demirbas (2000),Goyal et al (2008),Mitchell et al (1995),Van de Velden et al (2008),Yanik et al (2007) LiquefactionMethanolDemirbas (2000),Kobayashi et al (2008),Kunaver et al (2007),Wang and Chen (et al (2006),Chynoweth et al (2001),Gunaseelan (1997),Ma et al (2005),Misi and Forster (2001),Mitchell et al (1995), Murphy and Power (the strategic, tactical and operational levels of the hierarchy, in the following two subsections.…”