The Role of CO2 as a Mild Oxidant in Oxidation and Dehydrogenation over Catalysts: A Review

Abstract

Carbon dioxide (CO2) is widely used as an enhancer for industrial applications, enabling the economical and energy-efficient synthesis of a wide variety of chemicals and reducing the CO2 levels in the environment. CO2 has been used as an enhancer in a catalytic system which has revived the exploitation of energy-extensive reactions and carry chemical products. CO2 oxidative dehydrogenation is a greener alternative to the classical dehydrogenation method. The availability, cost, safety, and soft oxidizing properties of CO2, with the assistance of appropriate catalysts at an industrial scale, can lead to breakthroughs in the pharmaceutical, polymer, and fuel industries. Thus, in this review, we focus on several applications of CO2 in oxidation and oxidative dehydrogenation systems. These processes and catalytic technologies can reduce the cost of utilizing CO2 in chemical and fuel production, which may lead to commercial applications in the imminent future.

Thermal characteristics and combustion reactivity of coronavirus face masks using TG-DTG-MS analysis

“…Since that ion current of gaseous effluents is not negligible for the region which begins at T = 420 °C and beyond, therefore, it can be inferred that CO formation was not entirely ascribed to reverse water–gas shift reaction and CO 2 dry reforming, thereby suggesting an additional GPRs between CO 2 and gaseous hydrocarbons evolved from M1 face mask pyrolysis. Consequently, CO 2 may acts as soft oxidant for catalytic behavior [ 16 ] of studied process. Therefore, the MS signal with amu 12 can be attributed to MS-fragment of CO molecule at T ~ 490 °C (Fig.…”

Designing of 3D Architecture Flower-like Mn-Promoted MgO and Its Application for CO2 Adsorption and CO2-Assisted Aerobic Oxidation of Alkylbenzenes

“…In the first part of our studies, the effect of Mn incorporation on the CO 2 adsorption capacity of MgO was investigated. In the last few decades, CO 2 has been used to produce peroxycarbonate species and promote the oxidation reaction. , Therefore, the second step of our research work was to focus on the utilization of Mn-promoted MgO materials for the CO 2 -assisted oxidation reaction without adding any oxidizing agents (H 2 O 2 and TBHP). For this, we have taken ethylbenzene as a model substrate for the CO 2 -assisted oxidation reactions (Scheme ).…”

Carbon Dioxide Capture, Utilization, and Sequestration: Current Status, Challenges, and Future Prospects for Global Decarbonization

“…(a) Markets for CO 2 -Derived Products. Leveraging CO 2 as a raw material for the synthesis of chemicals, fuels, and various products holds the potential to catalyze the emergence of new markets and industries. ,− For example, CO 2 can be converted to methanol, which is used as a fuel and feedstock for the production of chemicals. The development of these new markets could lead to economic growth and job creation.…”