Nigeria Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to China was US$449.25 Thousand during 2013, according to the United Nations COMTRADE database on international trade. Nigeria Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to China - data, historical chart and statistics - was last updated on May of 2024.