A composite polymeric membrane includes polylactic acid polymer and an additive component, wherein the additive component includes activated carbon functionalized with polyethylenimine. A method of filtering a liquid includes contacting a liquid with a composite polymeric membrane, wherein the liquid includes one or more metals and the membrane includes an additive component and a polylactic acid polymer, and wherein the additive component includes activated carbon functionalized with polyethylenimine.

The invention provides a waste gas purification apparatus and residual heat utilization and control device for intelligent printing and dyeing waste gas. The apparatus includes: a circulating water storage tank; a liquid circulation tank; a water filtration system, connected to the storage tank; a bubble generation device, connected to the storage tank; and an organic waste gas removal device. An upper end of the waste gas removal device is connected to the bubble generation device and the liquid circulation tank, and a lower end is connected to the liquid circulation tank. The utilization and control device includes a residual heat cascade utilization unit, a spraying unit, a composite pulse static absorption column unit, a twin-stage high-temperature water white smoke elimination unit, and an air discharge unit sequentially disposed in a waste gas flow direction, and includes an oil-water separation box, a sodium chloride electrolysis device, and the purification apparatus.

The invention provides a waste gas purification apparatus and residual heat utilization and control device for intelligent printing and dyeing waste gas. The apparatus includes: a circulating water storage tank; a liquid circulation tank; a water filtration system, connected to the storage tank; a bubble generation device, connected to the storage tank; and an organic waste gas removal device. An upper end of the waste gas removal device is connected to the bubble generation device and the liquid circulation tank, and a lower end is connected to the liquid circulation tank. The utilization and control device includes a residual heat cascade utilization unit, a spraying unit, a composite pulse static absorption column unit, a twin-stage high-temperature water white smoke elimination unit, and an air discharge unit sequentially disposed in a waste gas flow direction, and includes an oil-water separation box, a sodium chloride electrolysis device, and the purification apparatus.

A horizontal scrubber may be configured for removal of sulfur dioxide and particulate matter from a gaseous stream derived from the combustion of biomass, including, for example, sugar cane bagasse. The scrubber may include a horizontally disposed housing including an inlet configured to receive a gas stream derived from combusted biomass and an outlet. The scrubber may further include a manifold of liquid nozzles disposed within the housing that are configured to provide a spray of liquid droplets in a co-current orientation to the gas stream. An array of tubes may be oriented adjacent to the manifold of liquid nozzles and may be configured to receive the gas stream and liquid droplets from the nozzle array, but providing minimal resistance to material flow. To encourage flow, members of the tube array may include circular walls with a substantially uniform cross section.

Disclosed in the present invention are a device system and method having sintering flue gas CO catalytic heat exchange and medium-and-low-temperature SCR denitration connected in series. In the device system, a CO catalytic heat storage and exchange device is arranged to completely replace an original heat exchanger arranged after a raw desulfurized flue gas pipe. The method comprises respectively carrying out first CO catalytic conversion and second CO catalytic conversion on sintering flue gas and denitrated flue gas by means of the CO catalytic heat storage and exchange device, thereby increasing CO conversion efficiency and reducing overall resistance of the system. In addition, the present invention takes both CO pollution control and carbon emission reduction into consideration and thus has good economic benefits and a good application prospect.

A method of isolating carbon dioxide is disclosed. The method provides a vessel comprising a first chamber and a second chamber separated by a cation exchange membrane, providing in the first chamber a first solution comprising a metal carbonate, providing in the second chamber a second solution comprising an acid, acidifying the first solution by allowing protons from the second solution pass through the cation exchange membrane, forming a salt in the second solution by allowing metal ions from the first solution to pass through the cation exchange membrane, and isolating the carbon dioxide. Apparatus for isolating carbon dioxide is also disclosed.

A system and method recover process gas from a source volume at a source pressure to a destination volume at an equal or greater pressure. A regulation process receive the process gas from the source volume and steps down the pressure. Each regulation uses one or more stage each using a pressure control valve for pressure step down and a heat exchanger for reheating the process gas thereafter. A gas scrubber receives the process gas from the regulation stages and collecting liquid from the process gas. A compression process receives the process gas from the gas scrubber and steps up the intermediate pressure to a final pressure. The compression can use one or more compression stages, each having a compression cycle for pressure step up and a heat exchanger for cooling the process gas thereafter. A discharge vessel receives the process gas from the compression process and discharges the process gas at the final pressure to the destination volume. The final pressure is equal to or greater than the destination pressure.

A contactor media includes continuous surface segments, wherein a first continuous surface segment has at least 50% of its surface area follow at least one of. (a) a contour of a first zero-thickness surface having a Gaussian curvature (G.sub.c) of 400 mm.sup.2G.sub.c<0.01 mm.sup.2; and (b) a contour of a second zero-thickness surface having at least one principal curvature (k.sub.i) of 20 mm.sup.1k.sub.i<0.1 mm.sup.1; and wherein the first continuous surface segment provides at least: (a) a total liquid hold-up of between about 1 kg/m.sup.3 to about 800 kg/m.sup.3 or (b) a static liquid hold-up of about 0.1 kg/m.sup.3 to about 800 kg/m.sup.3.

A diesel exhaust fluid (DEF) for reducing nitrogen oxides in diesel exhaust streams while also reducing the deposition of urea and/or urea decomposition compounds in diesel exhaust systems of engines that use DEF and require selective catalytic reduction. The DEF has about 15 wt. % to about 40 wt % process purified urea; substantially purified water; and a compound additive that stabilizes the DEF product, generates water in the diesel exhaust streams at temperatures greater than 100 C., interferes with competing reactions that would otherwise prevent decomposition of urea or produce undesired decomposition deposit compounds including biuret, cyanuric acid, ammelide, ammeline, and melamine, or both generates water and interferes with the competing reactions at lower temperatures. The compound additive is an inorganic such as boric acid. Also disclosed are a related method of using the DEF in a diesel exhaust system and a system including the DEF as one component.

A system for waste gas treatment is provided. The system for waste gas treatment comprises a photochemical reactor comprising an ultraviolet source. The photochemical reactor is configured to receive a waste gas and to break down, by using the ultraviolet source, the waste gas into one or more primary gaseous by-products. The system for waste gas treatment comprises an absorption reactor. The absorption reactor is connected in series with the photochemical reactor. The absorption reactor is configured to collect and/or convert the one or more primary gaseous by-products into one or more secondary by-products by the use of a liquid containing calcium ions.