Carbon dioxide reduction through mineral carbonation by steel slag.

Carbon dioxide (CO) mineralization technology has attracted significant attention, due to the synergistic terminal treatment of CO and industrial waste. The combined CO mineralization process with steel enterprises is a promising route to simultaneously address CO emissions and SS treatment. Recently, a serial of the relevant work focus on a single type of steel slag (SS), and the understanding of CO absorption by mineralization of various SS is very lacking.

Efficient Dynamic Phase Splitting Driven by Centrifugal Force for CO Capture from Flue Gas using Biphasic Solvents.

Carbon dioxide (CO) chemisorption using biphasic solvents has been regarded as a promising approach, but challenges remain in achieving efficient dynamic phase-splitting during practical implementation. To address this, the centrifugal force was innovatively adopted to enhance the coalescence and separation of immiscible fine droplets within the biphasic solvent. The comprehensive evaluation demonstrates that centrifugal phase-splitting shows outstanding separation efficiency (>95%) and excellent applicability for various solvents.

Sulfur Migration Enhanced Proton-Coupled Electron Transfer for Efficient CO Desorption with Core-Shelled C@MnO.

Transforming hazardous species into active sites by ingenious material design was a promising and positive strategy to improve catalytic reactions in industrial applications. To synergistically address the issue of sluggish CO desorption kinetics and SO-poisoning solvent of amine scrubbing, we propose a novel method for preparing a high-performance core-shell C@MnO catalyst for heterogeneous sulfur migration and in situ reconstruction to active -SOH groups, and thus inducing an enhanced proton-coupled electron transfer (PCET) effect for CO desorption. As anticipated, the rate of CO desorption increases significantly, by 255%, when SO is introduced.

Performance and mechanisms of alkaline solid waste in CO mineralization and utilization.

CO mineral sequestration using alkaline solid waste (ASW) is a promising strategy for synergistically reducing CO emissions and reusing industrial waste. However, improvement the carbonation degree still remains challenges due to the sluggish leaching rate of Ca/Mg ion at low pH. To the issues, this study proposed an amine-mediated CO absorption and mineralization process with six common ASWs, as well an ecological utilization route of CO-ASW productions.

Comprehensive evaluation of an ionic liquid based deep purification process for NH-containing industrial gas.

Ammonia (NH) emission has caused serious environment issues and aroused worldwide concern. The emerging ionic liquid (IL) provides a greener way to efficiently capture NH. This paper provides rigorous process simulation, optimization and assessment for a novel NH deep purification process using IL.

Energy-Efficient Biphasic Solvents for Industrial Carbon Capture: Role of Physical Solvents on CO Absorption and Phase Splitting.

Physical solvent is a promising alternative for the phase splitting of solvent to drastically reduce the regeneration energy during CO capture. Here, an aqueous biphasic solvent, optimally composed of 30 wt % polyamine (, -dimethylpropylamine, DMPA) and 50 wt % physical solvent (polyethyleneglycol dimethyl ether, NHD), is prepared, which presents high cyclic loading, low regeneration energy, and good stability. L(4) orthogonal tests are performed to comprehensively evaluate the mass-transfer kinetics and the effect of crucial conditions, verifying the weak effect of NHD solvent on mass transfer.