An oxidation resistant absorbent for capturing carbon dioxide from a gas stream. The oxidation resistant absorbent includes an alkanolamine with a weight percent in a range of 10 wt. % to 35 wt. % to a total amount of the oxidation resistant absorbent, a base with a weight percent in a range of 1 wt. % to 15 wt. % to a total amount of the oxidation resistant absorbent, a plurality of nanoparticles with a weight percent in a range of 0.1 wt. % to 3 wt. % to a total amount of the oxidation resistant absorbent, and water.

An automatic control system (ACS) for capturing and utilizing carbon dioxide (CO.sub.2) of one or more gases from one or more plants receives one or more parameters of at least one gas of one or more gases through a system gas flow inlet channel, a first volumetric flow rate of the one or more gases through a plug flow reactor (PFR), a second volumetric flow rate of the one or more gases through a bypass channel that bypasses the PFR, the CO.sub.2 flowing into the CO.sub.2 capture unit, or the syngas flowing into the CO.sub.2 capture unit. The ACS commands one or more flow controllers to modulate at least one of the first volumetric flow rate of the one or more gases through PFR or the second volumetric flow rate of the one or more gases through the bypass channel based on the one or more parameters.

The invention describes a process for producing sulfuric acid by catalytic oxidation of SO.sub.2 to SO.sub.3 and subsequent absorption of the SO.sub.3 in sulfuric acid, wherein the SO.sub.3 is introduced into a first absorption stage (primary absorber) and at least partly absorbed there in concentrated sulfuric acid, wherein the SO.sub.3 not absorbed in the first absorption stage is supplied to a second absorption stage (secondary absorber) for the further absorption in concentrated sulfuric acid, and wherein the sulfuric acid is cooled after passing through the two absorption stages. The cooling of the sulfuric acid is effected in at least two heat exchangers connected in parallel, wherein one of the at least two heat exchangers is operated as partial evaporator and is cooled with boiler feed water/steam and the other one is cooled with cooling water and operated as pure acid cooler.

A method of selectively catalysing the reduction of oxides of nitrogen (NO.sub.x) including nitrogen monoxide in an exhaust gas of a stationary source of NO.sub.x emissions also containing oxides of sulfur (SO.sub.x) comprising the steps of passively oxidising nitrogen monoxide to nitrogen dioxide (NO.sub.2) over an oxidation catalyst comprising a platinum group metal so that a NO.sub.2/NO.sub.x content is from 40-60%; introducing a nitrogenous reductant into the exhaust gas; and contacting exhaust gas having the 40-60% NO.sub.2/NO.sub.x content and containing the nitrogenous reductant with a selective catalytic reduction (SCR) catalyst comprising an aluminosilicate zeolite promoted with copper.

According to embodiment, a carbon dioxide capturing system cools a regenerator discharge gas discharged from a regenerator 5 containing carbon dioxide by a cooling unit 8, and then sends the gas to a cleaner 9. The cleaner 9 receives condensed water generated from the regenerator discharge gas cooled by the cooler 9, and a gaseous cooled regenerator discharge gas, and cleans the cooled regenerator discharge gas by a cleaning liquid. The cleaner 9 has a first liquid reservoir 9b configured to store the condensed water, and a second liquid reservoir 9c configured to store the cleaning liquid having cleaned the cooled regenerator discharge gas.

The present invention relates to a method and a system for the treatment of exhaust gas from industrial processes comprising at least the following consecutive steps: a) passing an exhaust gas comprising volatile organic compounds (VOCs) and/or amines through a catalytic zone at elevated temperatures, said catalytic zone comprises a deNO.sub.x-catalyst and an oxidation catalyst thereby providing a first treated gas stream, and b) subjecting the first treated gas stream to ultraviolet radiation in order cause photooxidation.

The present invention relates to a carbon dioxide absorbent comprising a triamine, a diamine and a dialkylene glycol dialkyl ether or trialkylene glycol dialkyl ether. The carbon dioxide absorbent according to the present invention can improve the carbon dioxide absorption capacity, absorption rate, and regeneration performance thereof simultaneously by using the triamine as a main absorbent, the diamine as a rate enhancer, the dialkylene glycol dialkyl ether or trialkylene glycol dialkyl ether as a fine disproportionation agent and a regeneration promoter.

A red mud utilization method based on co-processing of industrial exhaust gas, sewage treatment and an environment-friendly and high-performance civil functional material, belongs to the technical field of environmental science and cementitious material preparation, and relates to a preparation process of a solid waste-based cementitious material, specifically including the steps: preparing an environment-friendly and high-performance red mud-based civil functional material by using slag obtained after sewage treatment with red mud and other solid wastes in physical and chemical activation and high-temperature calcination methods. The compressive strength of a solid waste-based cementitious material prepared by using the method can reach 29 MPa, the leaching quantity (lower than 3.0 ppm) of toxic elements such as heavy metals is far lower than the national standard requirement, and a solid waste-based cementitious material with great performance can be prepared.

Provision of a gas production apparatus that can stably produce a product gas with carbon monoxide as its main component from a separated gas including carbon dioxide as a main component.

The gas production apparatus 1 consists of the following: a separation and capture section 5, which separates and captures separated gas containing mainly of carbon dioxide from the exhaust gas taken from the line of the exhaust gas equipment; a reaction section 4 including at least a reactor, which is connected to downstream of the separation and capture section 5, contains a reducing agent that generates carbon monoxide through a reduction reaction of carbon dioxide brought into contact with the separated gas, and is capable of separating at least some of oxygen atoms separated from carbon dioxide; a pressure regulating section 7 connected to downstream of the reactor 4 to regulate the pressure of the separated gas supplied to the reactor; and the flow regulating section 6 connected on the upstream of the separation and capture section 5 and regulates the flow rate of the separated gas supplied to the reactor.

An organic carbonate synthesis catalyst for electrochemically synthesizing an organic carbonate from carbon monoxide, comprises: an active particle containing a metal element; and a porous carbon supporting the active particle.