A system for treating exhaust gas of a vessel having at least one engine equipped with a turbocharger includes a storage tank configured to store a powder for treating the exhaust gas, and a dosing assembly fluidly coupled to the storage tank. The dosing assembly is configured to inject the powder into the exhaust gas at or adjacent the turbocharger, and includes a nozzle for injecting the powder into the exhaust gas. The nozzle includes a conduit configured to transport the powder, and a conical member mounted to a distal end of the conduit and defining a central hole in fluid communication with the conduit for guiding a first portion of the powder through the central hole. The distal end of the conduit and the conical member together define an annular gap configured to guide a second portion of the powder through the annular gap.

In a carbon dioxide recovery system. an electrochemical cell of a recovery device includes a working electrode having an adsorbent capable of adsorbing carbon dioxide, and a counter electrode paired with the working electrode. A sensor detects a recovery amount that is an amount of carbon dioxide recovered in the recovery device and sent to a carbon dioxide recovery tank. A controller applies a first potential between the electrodes only for an adsorption time period in an adsorption mode such that the adsorbent adsorbs carbon dioxide. The adsorption time period corresponds to a target adsorption amount that is an amount of carbon dioxide that can be adsorbed by the adsorbent. The controller applies a second potential between the electrodes in a recovery mode such that the adsorbed carbon dioxide is desorbed. The controller acquires the target adsorption amount as a correlation value correlated with the detected recovery amount.

In a carbon dioxide recovery system. an electrochemical cell of a recovery device includes a working electrode having an adsorbent capable of adsorbing carbon dioxide, and a counter electrode. A sensor detects a recovery amount of carbon dioxide recovered and sent to a carbon dioxide recovery tank. A controller applies a first potential between the electrodes only for a time period in an adsorption mode. The time period corresponds to a target amount of carbon dioxide that can be adsorbed by the adsorbent. A storage unit stores multiple adsorption-amount change data indicating association between the target amount and the time period. The controller acquires the target amount correlated with the detected recovery amount, acquires the time period by using the acquired target amount, and selects data from among the multiple adsorption-amount change data according to the recovery amount as in-use data for acquisition of the time period.

A controller unit is configured to control a recovery unit, an expeller unit, a collector unit and a connector unit. The controller unit is configured to place each of a first collector opening and closing device, a second collector opening and closing device and an expeller opening and closing device in a closed state and place a connector opening and closing device in an opened state and thereafter operate the expeller unit to expel a remaining gas from a collector pipe through a connector pipe and an expeller pipe to execute an exhausting process before the controller unit executes a recovering process by desorbing carbon dioxide from an electrochemical cell device and collecting the carbon dioxide at a utilization unit through the collector pipe after the desorbing of the carbon dioxide from the electrochemical cell device.

A system and a method for reduction or elimination of environmentally harmful or “greenhouse” gases in situations in which gaseous hydrocarbons are flared or vented from an oil and gas well are disclosed. The system configures to inject a chemically reactive, or dispersive, or reactive and dispersive atomized mist into a gas flow line leading to a flare stack. The mist reacts with the gas in the flow line to convert methane to hydrogen and carbon monoxide and to reduce other harmful gases, facilitating a clean-burning, compact flare of blue color due to the presence of primarily hydrogen, some carbon monoxide, and a small amount of residual methane. The hydrogen and carbon monoxide may be captured and stored before reaching the ignition point at the top of the flare stack.

Disclosed is a gas collection apparatus used in manufacturing a semiconductor. The apparatus includes: a housing having a chamber formed therein; a heating member installed in the housing to heat cobalt-carbon gas introduced into the chamber; a cobalt deposition member installed across the chamber of the housing to deposit cobalt composite; and a cooling member that induces carbon composite to be solidified and deposited while rapidly cooling the carbon composite.

One aspect of the invention relates to a method comprising a single-stage conversion of an atmospheric pollutant, such as NO, NO.sub.2 and/or SOX in a first stream to one or more mineral acids and/or salts thereof by reacting with nonionic gas phase chlorine dioxide (ClO.sub.2.sup.0), wherein the reaction is carried out in the gas phase. Another aspect of the invention relates to a method comprising first adjusting the atmospheric pollutant concentrations in a first stream to a molar ratio of about 1:1, and then reacting with an aqueous metal hydroxide solution (MOH). Another aspect of the invention relates to an apparatus that can be used to carry out the methods disclosed herein. The methods disclosed herein are unexpectedly efficient and cost effective, and can be applied to a stream comprising high concentration and large volume of atmospheric pollutants.

A system for removing undesirable compounds from contaminated air includes a biofilter having an alkaline material introduction system and a fuzzy-logic based controller. A contaminant, such as hydrogen sulfide, is removed from contaminated air by passing the contaminated air through the biofilter.

Methods and systems described perform air cleaning and/or sanitization in a heating, ventilation, air conditioning, and/or refrigeration (HVACR) system by detecting a concentration of airborne contaminants in a space serviced by the HVACR system. The detected concentration of airborne contaminants is determined whether it exceeds a threshold relative to a capacity of a first air cleaner. When the detected concentration of airborne contaminants exceeds the threshold, a second air cleaner is selected and enabled to be activated in the space. When the detected concentration of airborne contaminants does not exceed the threshold, the first air cleaner is selected and enabled to be activated in the space. The first air cleaner has a cleaning material different from the second air cleaner, and the first air cleaner, relative to the second air cleaner, treats the space at a lower concentration of airborne contaminants. The second air cleaner includes specifically designed cleaner modules.

According to one embodiment, a gas processing equipment includes an oxygen remover 2 that removes oxygen contained in exhaust gas G, and a gas processing device 3 that processes pretreated exhaust gas G (P), from which the oxygen has been removed by the oxygen remover 2, with a carbon dioxide absorbent solvent S as a treatment agent.