Synergistic reduction of air pollutants and carbon dioxide emissions in Shanxi Province, China from 2013 to 2020.

Synergistic reduction of air pollutants and carbon dioxide (CO) emissions is currently a key environmental policy in China, yet provincial-level studies remain scarce. To fill the gap, this study developed a coupled emission inventory from 2013 to 2020 in Shanxi, a coal-dependent province critical to China's energy security. This facilitated the investigation of emission trends, primary sources, synergistic effects, and spatial distribution.

Acid modification enhances selective catalytic reduction activity and sulfur dioxide resistance of manganese-cerium-cobalt catalysts: Insight into the role of phosphotungstic acid.

Improving the SO resistance of catalysts is crucial to driving commercial applications of Mn-based catalysts. In this work, the phosphotungstic acid (HPW) modification strategy was applied to improve the N selectivity, SO and HO resistance of the Mn-Ce-Co catalyst, and further, the mechanism of HWP modification on enhanced catalytic performance was explored. The results showed that HPW-Mn-Ce-Co catalyst exhibits higher NO conversion (~100% at 100-250 °C) and N selectivity (exceed 80% at 50-350 °C) due to more oxygen vacancies, greater surface acidity, and lower redox capacity.

Recent advances in selective catalytic oxidation of nitric oxide (NO-SCO) in emissions with excess oxygen: a review on catalysts and mechanisms.

Nitric oxides (NO, which mainly include more than 90% NO) are one of the major air pollutants leading to a series of environmental problems, such as acid rain, haze, photochemical smog, etc. The selective catalytic oxidation of NO to NO (NO-SCO) is regarded as a key process for the development of selective catalytic reduction of NO by ammonia (via fast selective catalytic reduction reaction) and also the simultaneous removal of multipollutant (pre-oxidation and post-absorption). Until now, scholars have developed various types of NO-SCO catalysts, dividing the main groups into noble metals (Pt, Pd, Ru, etc.

Facile fabrication of nanosheet-assembled MnCoO hollow flower-like microspheres as highly effective catalysts for the low-temperature selective catalytic reduction of NO by NH.

A series of MnCoO flower-like hollow microspheres with various molecular proportions of reactant were prepared through simple solvothermal method for the ammonia selective catalytic reduction (SCR) at low temperatures. The as-prepared samples have been applied by various characterization techniques to explore the formation process of the morphology and physicochemical properties. The Mn(1)Co(1)O presented the optimal intrinsic catalytic performance (95% NO conversion at 75 °C), favorable thermal stability, and strong SO resistance.

Fe-modified Ce-MnO/ACF catalysts for selective catalytic reduction of NO by NH at low-middle temperature.

A series of MnO/ACF, Ce-MnO/ACF, and Fe-Ce-MnO/ACF catalysts on selective catalytic reduction (SCR) of NO with NH at low-middle temperature had been successfully prepared through ultrasonic impregnation method, and the catalysts were characterized by SEM, XRD, BET, H-TPR, NH-TPD, XPS, and FT-IR spectroscopy, respectively. The results demonstrated that the 15 wt% Fe-Ce-MnO/ACF catalyst achieved 90% NO conversion (100~300 °C), good water resistance, and stability (175 °C). The excellent catalytic performance of the Fe-Ce-MnO/ACF catalyst was mainly attributed to the interaction among Mn, Ce, and Fe.