主题：中国在海相地层发现大油气田 -- 一个秤砣

目前重点是IGCCIntegrated Gasification Combined Cycle ， IGCC发电比常规燃煤电站需要多15％－20％的投资， 但是对环境污染最小。 美国只有1/10不到的电力公司说会考虑IGCC， 但是中国已经开始着手上IGCC。

以下引自American Electric Power

http://www.aep.com/about/igcc/environmental.htm

IGCC technology offers a number of important environmental benefits:

* IGCC has the potential for the best emission characteristics among coal-based technologies.

* IGCC provides for efficient removal of sulfur compounds, particulates and mercury before the gas is burned instead of removing the compounds from the exhaust gases following combustion.

* Nitrogen oxide (NOx) emissions are on a par with emissions from a conventional coal-fired plant equipped with state-of-the-art emission controls.

* Emissions of carbon dioxide are comparable to emissions from a conventional coal plant. However, should future environmental regulations require the removal of CO2, an IGCC plant can separate and sequester CO2 from the process at a significantly lower cost than conventional technologies.

* The IGCC process requires about one-third less water than a pulverized coal plant

* The IGCC process generates less solid waste than a conventional coal plant.

* IGCC plants enjoy greater fuel flexibility than conventional coal plants. IGCC plants can utilize various coal types, biomass, and other refinery by-products.