scholarly journals Effect of metal-doped VPO catalysts for the aldol condensation of acetic acid and formaldehyde to acrylic acid

RSC Advances ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 5958-5966 ◽  
Author(s):  
Yumeng Wang ◽  
Yuelin Hou ◽  
Xue Hao ◽  
Zhenlu Wang ◽  
Wanchun Zhu
Keyword(s):  
Acetic Acid ◽  
Acrylic Acid ◽  
Active Site ◽  
Aldol Condensation ◽  
Catalytic Performance ◽  
Moderate Amount ◽  
Vpo Catalysts ◽  
Metal Doped

The acidity of the catalyst is a major factor affecting the catalytic performance of the catalyst. It is presumed that B acid is the main active site of this reaction, and a moderate amount of acid is favorable to facilitate the reaction.

scholarly journals Acrylic acid synthesis by aldol condensation of acetic acid and formaldehyde on V-Ti-PO4 catalysts

2017 ◽  
Vol 0 (32(1254)) ◽  
pp. 117-122
Author(s):  
Iryna Shpyrka ◽  
Roman Nebesnyi ◽  
Zorian Pikh ◽  
Volodymyr Sydorchuk ◽  
Volodymyr Ivasiv ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Acrylic Acid ◽  
Aldol Condensation ◽  
Acid Synthesis

scholarly journals Aldol condensation of acetic acid with formaldehyde to acrylic acid over Cs(Ce, Nd) VPO/SiO2 catalyst

RSC Advances ◽  
2017 ◽  
Vol 7 (76) ◽  
pp. 48475-48485 ◽  
Author(s):  
Aili Wang ◽  
Jing Hu ◽  
Hengbo Yin ◽  
Zhipeng Lu ◽  
Wuping Xue ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Acrylic Acid ◽  
Aldol Condensation

The Cs-, Ce-, and Nd-modified VPO/SiO2 exhibited higher activity for aldol condensation of acetic acid with formaldehyde to acrylic acid.

Aldol condensation of acetic acid and formaldehyde to acrylic acid over a hydrothermally treated silica gel-supported B-P-V-W oxide

2020 ◽  
Vol 594 ◽  
pp. 117472 ◽  
Author(s):  
R. Nebesnyi ◽  
Z. Pikh ◽  
V. Sydorchuk ◽  
S. Khalameida ◽  
I. Kubitska ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Acrylic Acid ◽  
Silica Gel ◽  
Aldol Condensation

Aldol condensation of acetic acid with formaldehyde to acrylic acid over SiO2-, SBA-15-, and HZSM-5-supported V-P-O catalysts

2016 ◽  
Vol 40 ◽  
pp. 145-151 ◽  
Author(s):  
Jing Hu ◽  
Zhipeng Lu ◽  
Hengbo Yin ◽  
Wuping Xue ◽  
Aili Wang ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Acrylic Acid ◽  
Aldol Condensation

Precisely phase-modulated VPO catalysts with enhanced inter-phase conjunction for acrylic acid production through the condensation of acetic acid and formaldehyde

2019 ◽  
Vol 374 ◽  
pp. 171-182 ◽  
Author(s):  
Jun Liu ◽  
Pengcheng Wang ◽  
Yina Feng ◽  
Zhijia Xu ◽  
Xinzhen Feng ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Acrylic Acid ◽  
Acid Production ◽  
Vpo Catalysts

Nb-Doped Vanadium Phosphorus Oxide Catalyst for the Aldol Condensation of Acetic Acid with Formaldehyde to Acrylic Acid

2018 ◽  
Vol 57 (36) ◽  
pp. 12055-12060 ◽  
Author(s):  
Yumeng Wang ◽  
Zhenlu Wang ◽  
Xue Hao ◽  
Wenxiang Zhang ◽  
Wanchun Zhu
Keyword(s):  
Acetic Acid ◽  
Acrylic Acid ◽  
Oxide Catalyst ◽  
Aldol Condensation ◽  
Phosphorus Oxide ◽  
Vanadium Phosphorus Oxide

scholarly journals Effect of Support Nature on the Efficiency of B–P–V–W–Ox Catalysts of Acrylic Acid Synthesis with Aldol Condensation of Acetic Acid with Formaldehyde

2019 ◽  
Author(s):  
Roman Nebesnyi ◽  
Iryna Kubitska ◽  
Oksana Orobchuk ◽  
Volodymyr Ivasiv ◽  
Volodymyr Sydorchuk ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Acrylic Acid ◽  
Aldol Condensation ◽  
Acid Synthesis ◽  
Effect Of Support

scholarly journals THE INFLUENCE OF THE SUPPORT NATURE ON THE EFFICIENCY OF B-P-W-V-Ox CATALYST OF ACRYLIC ACID SYNTHESIS BY ALDOL CONDENSATION OF ACETIC ACID WITH FORMALDEHYDE

2019 ◽  
Vol 2 (2) ◽  
pp. 110-114
Author(s):  
I. I. Kubitska ◽  
◽  
R. V. Nebesnyi ◽  
V. V. Ivasiv ◽  
◽  
...  
Keyword(s):  
Acetic Acid ◽  
Acrylic Acid ◽  
Aldol Condensation ◽  
Acid Synthesis

scholarly journals Kinetics of aldol condensation of acetic acid with formaldehyde on B–P–V–W–OX/SiO2 catalyst

2020 ◽  
Vol 3 (2) ◽  
pp. 39-45
Author(s):  
N. S. Pavliuk ◽  
◽  
V. V. Ivasiv ◽  
O. M. Orobchuk ◽  
D. S. Shevchenko ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Chemical Composition ◽  
Acrylic Acid ◽  
Gas Phase ◽  
Silicon Oxide ◽  
Aldol Condensation ◽  
Condensation Reaction ◽  
Kinetic Equations ◽  
Stable Chemical ◽  
Kinetics Of

New catalysts B–P–V–W–Ox/SiO2 of gas-phase condensation of acetic acid from formaldehyde to acrylic acid on an industrial carrier of stable chemical composition (colloidal silicon oxide, Aerosil A-200) were synthesized. It is shown that the hydrothermal treatment of the carrier allows to increase the activity and selectivity of the catalyst in the reactions of aldol condensation of acetic acid with formaldehyde. It was found that the developed catalyst is effective in the condensation reaction of acetic acid with formaldehyde, which allows to obtain acrylic acid with a yield of 68.7% and a selectivity of 94.1%. The kinetic regularities of the reaction on this catalyst are established. According to the proposed kinetic equations, kinetic parameters are calculated that describe the condensation reaction of acetic acid with formaldehyde.

Catalytic Resonance Theory: Parallel Reaction Pathway Control

2019 ◽  
Author(s):  
M. Alexander Ardagh ◽  
Manish Shetty ◽  
Anatoliy Kuznetsov ◽  
Qi Zhang ◽  
Phillip Christopher ◽  
...  
Keyword(s):  
Chemical Reactions ◽  
Active Site ◽  
Active Sites ◽  
Reaction Pathway ◽  
Control Strategies ◽  
Oscillation Amplitude ◽  
Catalytic Performance ◽  
Parallel Reaction ◽  
Resonance Theory ◽  
Static Conditions

Catalytic enhancement of chemical reactions via heterogeneous materials occurs through stabilization of transition states at designed active sites, but dramatically greater rate acceleration on that same active site is achieved when the surface intermediates oscillate in binding energy. The applied oscillation amplitude and frequency can accelerate reactions orders of magnitude above the catalytic rates of static systems, provided the active site dynamics are tuned to the natural frequencies of the surface chemistry. In this work, differences in the characteristics of parallel reactions are exploited via selective application of active site dynamics (0 < ΔU < 1.0 eV amplitude, 10<sup>-6</sup> < f < 10<sup>4</sup> Hz frequency) to control the extent of competing reactions occurring on the shared catalytic surface. Simulation of multiple parallel reaction systems with broad range of variation in chemical parameters revealed that parallel chemistries are highly tunable in selectivity between either pure product, even when specific products are not selectively produced under static conditions. Two mechanisms leading to dynamic selectivity control were identified: (i) surface thermodynamic control of one product species under strong binding conditions, or (ii) catalytic resonance of the kinetics of one reaction over the other. These dynamic parallel pathway control strategies applied to a host of chemical conditions indicate significant potential for improving the catalytic performance of many important industrial chemical reactions beyond their existing static performance.

Sign in / Sign up

Export Citation Format

Share Document