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Ethylene dichloride Recently, Chemetry (Moss Landing, Calif.; www.chemetrycorp.com) and Braskem…
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By Edited by Gerald Ondrey |

Mercury sorbent A palladium-on-alumina sorbent, designed to remove mercury from synthesis gas in coal-gasification plants, has captured more than 98% of the mercury contained in a sour syngas stream in a test conducted by Southern Co. (Atlanta, Ga.; www.southernco.com). The test showed that the sorbent’s performance was unaffected by high sulfur levels, says Pannalal Vimalchand, a consulting engineer at the company’s Wilsonville, Ala., Power Systems Development Facility, where the test was carried out. The syngas contained 1,400 ppm of H2S, plus other sulfur species, says Vimalchand. The sorbent technology is being developed by Johnson Matthey (Malvern, Pa.; www.matthey.com), which licensed it from the U.S. Dept. of Energy’s National Energy Technology Laboratory (NETL; Pittsburgh, Pa.). The key feature of the sorbent is that it removes Hg at high temperatures, so it doesn’t affect the thermal efficiency of the gasification process by requiring gas cooling. In the Southern Co. tests, performed at 500°F, the adsorbent also removed more than 99% of the arsenic and selenium in the gas. A new H2SO4 process Now being commissioned at a lead smelter operated by Berzelius in Stolberg, Germany, is a new sulfur trioxide…
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