Preliminary projections of the effects of chloride-control structures on the quarternary aquifier at Great Salt Plains, Oklahoma /

Bibliography: p. 43-45.Mode of access: Internet

Staged fluidized-bed coal combustor for boiler retrofit

The Advanced Staged Fluidized-Bed Coal Combustion System (ASC) is a novel clean coal technology for either coal-fired repowering of existing boilers or for incremental power generation using combined-cycle gas turbines. This new technology combines staged combustion for gaseous emission control, in-situ sulfur capture, and an ash agglomeration/vitrification process for the agglomeration/vitrification of ash and spent sorbent, thus rendering solid waste environmentally benign. The market for ASC is expected to be for clean coal-fired repowering of generating units up to 250 MW, especially for units where space is limited. The expected tightening of the environmental requirements on leachable solids residue by-products could considerably increase the marketability for ASC. ASC consists of modular low-pressure vessels in which coal is partially combusted and gasified using stacked fluidized-bed processes to produce low-to-medium-Btu, high-temperature gas. This relatively clean fuel gas is used to repower/refuel existing pulverized-coal, natural gas, or oil-fired boilers using bottom firing and reburning techniques. The benefits of ASC coal-fired repowering include the ability to repower boilers without obtaining additional space while meeting the more stringent environmental requirements of the future. Low NO{sub x}, SO{sub x}, and particulate levels are expected while a nonleachable solid residue with trace metal encapsulation is produced. ASC also minimizes boiler modification and life-extension expenditures. Repowered efficiencies can be restored to the initial operating plant efficiency, and the existing boiler capacity can be increased by 10%. Preliminary cost estimates indicate that ASC will have up to a $250/kW capital cost advantage over existing coal-fired repowering options. 4 figs., 4 tabs

Creativity and socio‐economic development: space for the interests of publics

Emphasising power in strategic choice, we consider people in actual and potential publics kindling their imagination and ideas in order to shape new directions in the economies in which they have an interest. This paper proposes ‘public creativity forums’, spaces defined by relations aimed at free communication and based upon shared values, including openness. Artistic activities are highlighted as a viaticum for people’s creativity, hence for their potential significance in influencing development in any sector or region. The case of self‐styled Mutoids is presented following original ethnographic research. These prospects are positioned in an analysis of transnational corporations, uneven economic development, choices over globalisation and regional competitiveness.creative space, artistic activities, strategic choice, public interests, Mutoids, ethnography, Z10, O10, R10, P00,