A Study of Energy Intensity and Carbon Intensity from Olefin Plants in Thailand Wasamon Chuapet, Nantamol Limphitakphong, Thanapol Tantisattayakul, Premrudee Kanchanapiya and Orathai Chavalparit MATEC Web Conf., 68 (2016) 14002 Published online: 01 August 2016 DOI: 10.1051/matecconf/20166814002