Continuous Dimethyl Carbonate Synthesis from CO2 and Methanol Using Cu-Ni@VSiO as Catalyst Synthesized by a Novel Sulfuration Method

Abstract

Conversion of carbon dioxide into useful chemicals is a valuable task. One way to perform it is to transform CO 2 into dimethyl carbonate (DMC) by a reaction with methanol. Catalyst exerts significant impact on this process. During this work, Cu-Ni@VSiO bimetallic catalysts were successfully synthesized by traditional solution and novel sulfuration methods. The catalytic materials were characterized by several analytical techniques and were tested in a continuous fixed-bed reactor under different reaction conditions to promote DMC synthesis from CO 2 and methanol in the absence of dehydrating agents. The effects of reaction temperature, pressure, space velocity, metal loading, and bulk density on the catalytic performance were investigated in detail. It was found that the activity of Cu-Ni@VSiO catalyst with the support obtained by the novel sulfuration method is about three times higher when compared to that of the catalyst with the support that is synthesized by the traditional solution method. This result may stem from the difference in microstructure of the studied catalytic materials.

Advances in Thermo-, Photo-, and Electrocatalytic Continuous Conversion of Carbon Dioxide into Liquid Chemicals

“…Zhang et al reported the effect of the synthesis process to prepare the support (VSiO), which in turn affected the catalytic activity of supported Cu−Ni bimetallic catalyst for DMC synthesis using a fixed bed flow reactor in the absence of dehydrating agent. 51 VSiO support prepared by the novel sulfuration method was found to significantly change the microstructure of the ensuing catalyst containing more Cu−Ni phase compared to the support obtained by the traditional solution method. Consequently, CO 2 and methanol could interact strongly with the Cu−Ni active sites to furnish three times higher catalytic activity.…”

“…The catalyst with 21 wt % metal oxide supported on KHNTs, owing to more basic sites, provided 7.85% methanol conversion with 89% DMC selectivity. Zhang et al reported the effect of the synthesis process to prepare the support (VSiO), which in turn affected the catalytic activity of supported Cu–Ni bimetallic catalyst for DMC synthesis using a fixed bed flow reactor in the absence of dehydrating agent . VSiO support prepared by the novel sulfuration method was found to significantly change the microstructure of the ensuing catalyst containing more Cu–Ni phase compared to the support obtained by the traditional solution method.…”

Diethyl Carbonate Synthesis from CO₂, Ethanol and Propylene Oxide in the presence of Dehydrating Agent of Ethylene over the novel catalysts of Supported Ni-Cu@Na₃PW₁₂O₄₀ and Mixed Ni-Cu@Na₃PW₁₂O₄₀

“…Temperature Programmed Reduction (TPR) characterization (Figure 3) was measured to analyze the interaction between catalysts components and determine the best hydrogen reduction temperature [39] in the step of catalyst preparation. The characteristic reduction peak of CuO was 392℃; The characteristic reduction peak of NiO was 493℃; And the decomposition temperature of sodium phosphotungstate was 682℃ for supported NiO-CuO@Na3PW12O40.…”

One-Pot Synthesis of Dimethyl Carbonate over a Binary Catalyst of an Ionic Liquid and an Alkali Carbonate under Low Pressure

“…The technical routes of industrialization include phosgenation, methanol oxidative carbonylation, and two-step transesterification. − Recently, the urea alcoholysis process for the synthesis of DMC has been developed . Direct preparation of DMC from methanol and CO 2 is one of the most preferable reactions. − Nonetheless, in most cases, the yield of DMC was far from satisfactory due to thermodynamic confinement and the decomposition of the catalysts by concomitant water . Naturally, CO 2 is inert and epoxide is reactively active.…”