Methanol synthesis from CO₂ using Ni and Cu supported Fe catalytic system: Understanding the role of nonthermal plasma surface discharge

Abstract

The present study combines nonthermal plasma (NTP) and thermal catalysis to exploit the synergism for direct conversion of CO 2 to CH 3 OH using H 2 . Series of catalyst, that is, CuO/QW, NiO/QW, Fe 2 O 3 /QW, NiO/Fe 2 O 3 /QW, CuO/Fe 2 O 3 / QW have been tested for CO 2 conversion and CH 3 OH selectivity. And it was observed that 5 wt% CuO/Fe 2 O 3 /QW exhibited better CO 2 conversion and CH 3 OH selectivity as compared to other catalysts. With 5 wt% CuO/Fe 2 O 3 /QW, at200°C and 2-W NTP input power (100 ml/min feed flow and 1:3 ratio of CO 2 and H 2 ) about 16.7% CO 2 conversion and 32.7% CH 3 OH selectivity have been reached. Indeed, the highest of 9.32 mmol h −1 gcat −1 of CH 3 OH space-time yield is obtained over CuO/Fe 2 O 3 /QW, which is about two times higher than the reported value in the literature (4.41 mmol h −1 gcat −1 of CH 3 OH using Cu/ZnO/Al 2 O 3 , 30°C, feed flow 40 ml/min, and 30-W input power).

Exploring the feasibility of liquid fuel synthesis from CO2 under cold plasma discharge: role of plasma discharge in binary metal oxide surface modification

“…The bigger the NiO particle size the more difficult it is to reduce compared to small sized NiO particles, as hydrogen mass transfer is hindered. 34 2CO (ads) → C (ads) + CO 2 C (ads) + 2H 2(ads) → CH 4 …”

“…In our previous work, we successfully showed that binary mixed metal oxides are more active towards CO 2 conversion and CH 3 OH production. 34 The main aim of this work was to employ mixed binary metal oxides of NiO–Fe 2 O 3 for the hydrogenation of CO 2 to CH 3 OH using non-thermal plasma. Dedicated efforts were made to investigate (i) the influence of individual and binary mixed metal oxides on CO 2 conversion and CH 3 OH production, (ii) the impact of NiO mixing on Fe 2 O 3 for CO 2 conversion and CH 3 OH selectivity, (iii) understanding the role that plasma power and operating temperature have on CO 2 conversion and products distribution, and (iv) the effect that plasma discharge has on catalyst surface modification.…”

The application of nonthermal plasma in methanol synthesis via CO2 hydrogenation

“…Joshi and Loganathan loaded CuO on quartz wool (QW) which was used as a catalyst in a modified plasma methanol synthesis. 18 In contrast to Wang et al, they introduced a heating furnace around the discharge area where the catalyst was loaded. They used stainless steel as the inner electrode and a stainless-steel mesh as the ground electrode (Figure 4).…”

“…NTP (or sometimes referred to as cold plasma) contains electrons, neutrals, electronically and vibrationally excited species, ions, radicals, and atoms. 18 The collision of these charged species with chemicals can catalyze the reactions such as bond dissociation or formation to take place at low temperatures and milder conditions than currently commercialized chemical processes. In contrast, the high temperature of thermal plasma makes it suitable for decomposition reactions.…”

Numerical investigation on the heterogeneous pulsed dielectric barrier discharge plasma catalysis for CO2 hydrogenation at atmospheric pressure: Effects of Ni and Cu catalysts on the selectivity conversions to CH4 and CH3OH

“…[1] Developing a highly efficient CO 2 conversion technology is one crucial approach to alleviate the increasing energy crisis and achieve the goal of "carbon neutral". Direct CO 2 decomposition, [2,3] dry reforming of CH 4 , [4][5][6][7] CO 2 hydrogenation, [8][9][10][11] electrochemical reduction process, and solar thermochemical conversion of CO 2 with H 2 O [12] have been studied by many research groups. Among them, CO 2 hydrogenation is a promising solution to convert CO 2 into value-added chemicals, such as alcohols and hydrocarbons, because of the lower thermodynamic limitation.…”