tailieunhanh - Coal America’s Energy Future phần 10

Mặc dù thực tế là không có nỗ lực đã được thực hiện để giảm hàm lượng thuỷ ngân, thủy ngân được giảm 78%. Tuy nhiên, một số giảm cũng rất thấp. Mức độ loại bỏ thủy ngân là phụ thuộc vào một số cơ chế, bao gồm cả mức độ giải phóng | APPENDICES The Secretary of Energy Washington DC 20585 February 13 2006 Mr. Thomas G. Kraemer Chairman National Coal Council Inc. 1730 M Street NW Suite 907 Washington DC 20036 Dear Mr. Kraemer Thank you for your February 1 2006 letter requesting authorization to hold a meeting of the Coal Policy Committee of the National Coal Council on March 9 2006 in St. Louis Missouri. 1 approve the holding of the meeting its agenda time and place. Sincerely Samuel w. Bodman Printed on recycled paper The Secretary of Energy Washington DC 20585 March 6 2006 Mr. Thomas G. Kraemer Chairman National Coal Council 1730 M Street NW Suite 907 Washington DC 20036 Dear Mr. Kraemer This is in response your letter of February 1 2006 requesting approval to hold a meeting of the full National Coal Council on March 22 2006 in Washington DC. I approve the holding of this meeting its agenda time and place. Sincerely Samuel w. Bodman Pnnted on recycled paper APPENDICES APPENDIX Correspondence from Industry Experts As submitted by Clark D. Harrison CQ Inc. Coal Cleaning for Control of Mercury Emissions Because mercury is generally associated with mineral matter to a large degree it can be partially removed by conventional physical coal cleaning technologies. Figure contains reduction data for mercury from 26 commercial or commercial-scale tests using conventional coal cleaning technologies1. Because they may become important in the future data is also provided for arsenic chromium and selenium. The goal of the cleaning was to reduce ash and sulfur in the clean-coal and no special effort was made to remove trace elements in any of these tests. In spite of the fact that no effort was made to reduce mercury content mercury was reduced by as much as 78 . However some reductions were also very low. The degree of mercury removal is dependent on several mechanisms including the degree of liberation of the mercury-bearing mineral the intensity of cleaning the mode of occurrence of the trace .