(560eh) Selective Hydrogenation of Acetylene to Ethylene over Bi-Metallic Catalysts
AIChE Annual Meeting
2019
2019 AIChE Annual Meeting
Catalysis and Reaction Engineering Division
Poster Session: Catalysis and Reaction Engineering (CRE) Division
Wednesday, November 13, 2019 - 3:30pm to 5:00pm
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Ryan Lee Ryan Lee 2 1 2019-04-12T13:03:00Z 2019-04-12T13:03:00Z 1 352 2008 16 4 2356 16.00
Clean Clean false false false false EN-US ZH-CN X-NONE
text-align:center;line-height:normal">
font-family:" times new roman color:black>Selective Hydrogenation of Acetylene to Ethylene over Bi-Metallic
Catalysts text-align:center;line-height:normal"> " times new roman> text-align:center;line-height:normal"> " times new roman>Qingyuan
Li1, Yuxin Wang1, George Skoptsov2, Jianli Hu1* text-align:center;line-height:normal"> " times new roman> text-align:center;line-height:normal"> font-family:" times new roman color:black>1Department of Chemical
and Biomedical Engineering, West Virginia University, Morgantown, West
Virginia, 26506, USA margin-left:.25in;margin-bottom:.0001pt;line-height:normal">2H Quest Vanguard, Inc. normal;tab-stops:13.5pt 67.5pt">*Corresponding Author
Email: john.hu@mail.wvu.edu justify;text-justify:inter-ideograph;line-height:normal"> justify;text-justify:inter-ideograph;line-height:normal"> justify;text-justify:inter-ideograph;line-height:normal">Selective hydrogenation of acetylene is one of
the most effective ways to remove this undesired by-product generated during conventional
petrochemical processes such as naphtha cracking. Concentration of acetylene
reported in such processes is typically lower than 1%. Plasma processes have
been shown to be effective for direct conversion of methane into hydrogen and
acetylene, and hence offer new pathways to use methane as a chemical feedstock.
In our study, a mixture of gas (CH4, C2H2, C2H4,
H2 and argon) with concentration of C2H2 up to
15% was used as the feedstock. Initial experiment was carried out using
conventional supported Pd-based catalysts, such as Pd/Al2O3
and Pd-Ag/Al2O3. About 100% conversion of C2H2
and 80% selectivity to C2H4 were obtained. To
reduce the cost of catalyst, bimetallic Pd-Ni catalyst was synthesized and
tested. Though the conversion of C2H2 was nearly 100%,
the selectivity of C2H4 was very low. Efforts were
focused on developing non-precious supported Ni-based catalysts including Ni/Al2O3,
Ni-P/Al2O3, Ni-Zn/Al2O3 and
Ni-Ga/Al2O3 catalysts. Under the same conversion,
Ni-Ga/Al2O3 catalyst showed highest selectivity to
ethylene, which was comparable to Pd-based catalyst. Besides, we found the
selectivity to ethylene is significantly affected by the ratio of Ni to Ga and
the catalysts preparation process. Specifically, with the increasing of Ga
loading, the selectivity to ethylene was increased significantly. Furthermore,
the calcination temperature and duration had strong impact on the performance
of the as-synthesized catalyst. text-align:center;line-height:17.0pt">
held technology company, based in Pittsburgh, Pennsylvania, focused on the
development and commercialization of novel hydrocarbon conversion technologies
utilizing microwave plasma. This material is based on work supported by the
Department of Energy, Office of Science through sub-award agreement no. 58495899with H Quest Vanguard, Inc. under
the Prime Award DE-SC0017227 Phase II SBIR.
Catalysts text-align:center;line-height:normal"> " times new roman> text-align:center;line-height:normal"> " times new roman>Qingyuan
Li1, Yuxin Wang1, George Skoptsov2, Jianli Hu1* text-align:center;line-height:normal"> " times new roman> text-align:center;line-height:normal"> font-family:" times new roman color:black>1Department of Chemical
and Biomedical Engineering, West Virginia University, Morgantown, West
Virginia, 26506, USA margin-left:.25in;margin-bottom:.0001pt;line-height:normal">2H Quest Vanguard, Inc. normal;tab-stops:13.5pt 67.5pt">*Corresponding Author
Email: john.hu@mail.wvu.edu justify;text-justify:inter-ideograph;line-height:normal"> justify;text-justify:inter-ideograph;line-height:normal"> justify;text-justify:inter-ideograph;line-height:normal">Selective hydrogenation of acetylene is one of
the most effective ways to remove this undesired by-product generated during conventional
petrochemical processes such as naphtha cracking. Concentration of acetylene
reported in such processes is typically lower than 1%. Plasma processes have
been shown to be effective for direct conversion of methane into hydrogen and
acetylene, and hence offer new pathways to use methane as a chemical feedstock.
In our study, a mixture of gas (CH4, C2H2, C2H4,
H2 and argon) with concentration of C2H2 up to
15% was used as the feedstock. Initial experiment was carried out using
conventional supported Pd-based catalysts, such as Pd/Al2O3
and Pd-Ag/Al2O3. About 100% conversion of C2H2
and 80% selectivity to C2H4 were obtained. To
reduce the cost of catalyst, bimetallic Pd-Ni catalyst was synthesized and
tested. Though the conversion of C2H2 was nearly 100%,
the selectivity of C2H4 was very low. Efforts were
focused on developing non-precious supported Ni-based catalysts including Ni/Al2O3,
Ni-P/Al2O3, Ni-Zn/Al2O3 and
Ni-Ga/Al2O3 catalysts. Under the same conversion,
Ni-Ga/Al2O3 catalyst showed highest selectivity to
ethylene, which was comparable to Pd-based catalyst. Besides, we found the
selectivity to ethylene is significantly affected by the ratio of Ni to Ga and
the catalysts preparation process. Specifically, with the increasing of Ga
loading, the selectivity to ethylene was increased significantly. Furthermore,
the calcination temperature and duration had strong impact on the performance
of the as-synthesized catalyst. text-align:center;line-height:17.0pt">
held technology company, based in Pittsburgh, Pennsylvania, focused on the
development and commercialization of novel hydrocarbon conversion technologies
utilizing microwave plasma. This material is based on work supported by the
Department of Energy, Office of Science through sub-award agreement no. 58495899with H Quest Vanguard, Inc. under
the Prime Award DE-SC0017227 Phase II SBIR.