摘要:
A coated flow-through substrate comprising a flow-through substrate and a sulfur- containing compound disposed as a coating on the flow-through substrate. The coated flow-through substrate may be used, for example, in the removal of a heavy metal from a fluid such as a gas stream.
摘要:
Methods and apparatus relate to removing selenium from a fluid. The fluid includes non-selenium constituents that are insoluble at a pH in which the fluid is passed through a sorbent bed in order to remove the selenium. Fouling of the sorbent bed can thereby result due to accumulation of the non-selenium constitutents, which are precipated solid materials. Intermittent washing of the sorbent bed with a heated and alkaline wash dissolves and removes the non-selenium constituents to maintain efficient operation and sustain selenium removal performance.
摘要:
Methods of preparing a mercury sorbent material are provided. The methods comprise making a copper/clay mixture by admixing a dry clay and a dry copper source; making a sulfur/clay mixture by admixing a dry clay and a dry sulfur source; admixing the copper/clay mixture and the sulfur/clay mixture, to form a mercury sorbent pre-mixture; and shearing the mercury sorbent pre-mixture to form the mercury sorbent material. Various substrates may be used with or instead of the clay, and various additives may be added to the copper, sulfur, clay, or mixture thereof.
摘要:
An adsorbent suitable for heavy metal absorption is described, comprising a thiol functionalised support containing a stabilising amount of an alkaline metal reacted with said thiol functionality. The adsorbent may be used to remove heavy metals e.g. mercury and/or arsenic, from wastewater streams such as produced water or flue gas scrubber waters.
摘要:
A composite comprising an inorganic substrate with a coating comprising activated carbon and a metal sulfide. The composite may be used, for example, for the removal of a contaminant, such as mercury, from a fluid stream.
摘要:
A sorbent body adapted for abating toxic elements from a fluid stream, such as a carbon combustion flue gas stream or a syngas stream produced in coal gasification process, and process for making such sorbent. The sorbent body comprises an activated carbon matrix defining a plurality of pores, sulfur and and additive adapated for promoting the abatement of toxic elements from the fluid stream. The sorbent is useful for abatement of, e.g., arsenic, cadmium, mercury and selenium from gas streams.
摘要:
Sorption media for removal of contaminants from fluid streams are provided. The sorption media comprise an active compound bound or linked to a support substrate or matrix. Support substrates can include iron- and alumina-based materials. A method for making sorption media for the removal of contaminants from fluid streams is also described. The method includes selecting a support substrate, and, optionally, providing a doping mixture comprising an active compound. The selected support substrate can be contacted with the doping mixture to form a doped mixture. The doped mixture can be reacted at a predetermined temperature and atmospheric environment for a predetermined duration to form an active media, wherein the active compound is bound or linked to the support substrate.
摘要:
A flow-through substrate comprising a sulfur-containing compound distributed throughout the flow-through substrate structure. The flow-through substrate may be used, for example, in the removal of a heavy metal from a fluid such as a gas stream.
摘要:
Bio-ceramic compositions for removing fluoride from water, and methods for making the same are disclosed. The bio-ceramic composition may comprise alumina, calcium oxide, sulfur, and/or carbon. The bio-ceramic composition may be produced from at least one natural media, such as chitin or eggshell membrane. The bio-ceramic composition may realize an initial fluoride adsorption capacity, in water, of at least about 5 mg/g.