|Modern gasification technologies offer an alternative process that devolatilizes hydrocarbons which are reformed into quality synthetic gas. Uses of syngas for power, chemicals and methanol production and flexibility of gas clean-up technologies make gasification a suitable process for WtE. By comparison with incineration which has benefits from the technological simplicity point of view, the gasification minimizes the pollutant emissions. According to the US Department of Energy (DOE) 2010 Worldwide Gasification Database and looking over the continental distribution by operating capacity, the leading region is Africa/ Middle East with 37% due the rapid growth in Qatar, followed by Asia/Australia with 36%. Still European region (16%) remains the third largest region; succeed by North America (10%) and Central/South America (1%).
The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.