Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Acetylene Hydrochlorination Over CeO 2 Promoted Au/Al 2 O 3 Catalyst
View through CrossRef
ABSTRACT
A series of CeO
2
promoted Au/Al
2
O
3
catalysts with very low Au loading (only 0.1%) was prepared by extrusion and then impregnation method. Au/CeO
2
–Al
2
O
3
catalyst was firstly used for the acetylene hydrochlorination to vinyl chloride (VC). The acetylene hydrochlorination over Au/CeO
2
–Al
2
O
3
was conducted in a down‐flow fixed bed micro‐reactor. The Au/CeO
2
–Al
2
O
3
catalyst was characterized through XRD, N
2
adsorption‐desorption, H
2
‐TPR, NH
3
‐TPD, SEM‐Mapping, and XPS. The results showed that CeO
2
introduction into γ‐Al
2
O
3
appreciably influenced the crystalline phase of γ‐Al
2
O
3
and its crystallites size. Meanwhile, CeO
2
was well dispersed onto γ‐Al
2
O
3
as the loading was low (below 5%). The promotion of γ‐Al
2
O
3
by CeO
2
apparently inhibited the reduction of Au over Au/CeO
2
–Al
2
O
3
in hydrogen gas. It was proposed that there existed a strong interaction between Au and CeO
2−
–Al
2
O
3
. The activity of acetylene hydrochlorination of Au/CeO
2
–Al
2
O
3
and VC selectivity was distinctly improved with the introduction of CeO
2
into γ‐Al
2
O
3
and reached to maximum at a CeO
2
loading of 5%. It could be considered that high hydrochlorination activity of Au/CeO
2
–Al
2
O
3
should be related with the well dispersed and stable Au
3+
over CeO
2
promoted γ‐Al
2
O
3
. 5% CeO
2
was highly dispersed onto the surface of γ‐Al
2
O
3
and inhibited the reduction of Au
3+
to greater extent and, which should be mainly responsible for high acetylene hydrochlorination activity and to vinyl chloride (VC) selectivity. The present results presented a simple and cheap preparation method of acetylene hydrochlorination catalyst with high activity.
Title: Acetylene Hydrochlorination Over CeO
2
Promoted Au/Al
2
O
3
Catalyst
Description:
ABSTRACT
A series of CeO
2
promoted Au/Al
2
O
3
catalysts with very low Au loading (only 0.
1%) was prepared by extrusion and then impregnation method.
Au/CeO
2
–Al
2
O
3
catalyst was firstly used for the acetylene hydrochlorination to vinyl chloride (VC).
The acetylene hydrochlorination over Au/CeO
2
–Al
2
O
3
was conducted in a down‐flow fixed bed micro‐reactor.
The Au/CeO
2
–Al
2
O
3
catalyst was characterized through XRD, N
2
adsorption‐desorption, H
2
‐TPR, NH
3
‐TPD, SEM‐Mapping, and XPS.
The results showed that CeO
2
introduction into γ‐Al
2
O
3
appreciably influenced the crystalline phase of γ‐Al
2
O
3
and its crystallites size.
Meanwhile, CeO
2
was well dispersed onto γ‐Al
2
O
3
as the loading was low (below 5%).
The promotion of γ‐Al
2
O
3
by CeO
2
apparently inhibited the reduction of Au over Au/CeO
2
–Al
2
O
3
in hydrogen gas.
It was proposed that there existed a strong interaction between Au and CeO
2−
–Al
2
O
3
.
The activity of acetylene hydrochlorination of Au/CeO
2
–Al
2
O
3
and VC selectivity was distinctly improved with the introduction of CeO
2
into γ‐Al
2
O
3
and reached to maximum at a CeO
2
loading of 5%.
It could be considered that high hydrochlorination activity of Au/CeO
2
–Al
2
O
3
should be related with the well dispersed and stable Au
3+
over CeO
2
promoted γ‐Al
2
O
3
.
5% CeO
2
was highly dispersed onto the surface of γ‐Al
2
O
3
and inhibited the reduction of Au
3+
to greater extent and, which should be mainly responsible for high acetylene hydrochlorination activity and to vinyl chloride (VC) selectivity.
The present results presented a simple and cheap preparation method of acetylene hydrochlorination catalyst with high activity.
Related Results
CEO Turnover: Governance, Games and Real Options
CEO Turnover: Governance, Games and Real Options
<p>The decision a Board of Directors (a board) makes to dismiss or retain its CEO is one of extreme importance in its role of representing shareholder interests and maximisin...
Manipulating micro-electric field and coordination-saturated site configuration boosted activity and safety of frustrated single−atom Cu/O Lewis pair for acetylene hydrochlorination
Manipulating micro-electric field and coordination-saturated site configuration boosted activity and safety of frustrated single−atom Cu/O Lewis pair for acetylene hydrochlorination
AbstractSimultaneously boosting acetylene hydrochlorination activity and avoiding formation of explosive copper acetylide over Cu-based catalyst, which represented a promising alte...
Ceo Characterıstıcs On Fırm Value Wıth Fırm Sıze As A Moderatıng Varıable
Ceo Characterıstıcs On Fırm Value Wıth Fırm Sıze As A Moderatıng Varıable
This study aims to determine the effect of CEO power, CEO narcissism, CEO education, and CEO tenure on firm value with firm size as a moderating variable. This study uses purposive...
Effects of long-term treatment with acetylene on nitrogen-fixing microorganisms
Effects of long-term treatment with acetylene on nitrogen-fixing microorganisms
Long periods of experimental incubation with acetylene led to a multifold enhancement of acetylene-reducing activity in Anabaena cylindrica, Anabaenopsis circularis, Rhodospirillum...
Chief Executive Officer (CEO) attributes and the value of quoted firms in Nigeria
Chief Executive Officer (CEO) attributes and the value of quoted firms in Nigeria
This study examined relevant CEO attributes and their influence on the value of quoted firms by obtaining empirical evidence from listed non-financial service firms in Nigeria. Anc...
How board refreshment shapes CEO power and earnings management: direct and moderating effects
How board refreshment shapes CEO power and earnings management: direct and moderating effects
Purpose
This study aims to investigate the impact of board refreshment on chief executive officer (CEO) power and the consequent implications on the relationshi...
Pengaruh CEO Characteristics terhadap Firm Performance pada Masa Pandemi COVID-19
Pengaruh CEO Characteristics terhadap Firm Performance pada Masa Pandemi COVID-19
ABSTRACT
This study purposes to examine the effect of CEO characteristics on the performance of financial sector companies listed on the Indonesia Stock Exchange (IDX) during...
Karakteristik Ceo terhadap Penghindaran Pajak dan Kinerja Perusahaan
Karakteristik Ceo terhadap Penghindaran Pajak dan Kinerja Perusahaan
This study aims to examine the effect of CEO characteristics, namely family ownership status (Family CEO) and CEO tenure, on firm performance and tax avoidance in manufacturing com...