{"id":{"repo_id":"must-thes","oai_identifier":"oai:scholarsmine.mst.edu:doctoral_dissertations-4217"},"canonical_url":"https://search.dev.ndltd.org/etd/must-thes/oai:scholarsmine.mst.edu:doctoral_dissertations-4217","repository":{"repo_id":"must-thes","name":"Missouri University of Science and Technology","base_url":"https://scholarsmine.mst.edu/do/oai/"},"display":{"title":"ENGINEERING NI/AL2O3 CATALYSTS BY ATOMIC LAYER DEPOSITION FOR METHANE REFORMING","abstract":"<p>\"Dry reforming of methane (DRM) could be a promising choice to utilize natural gas (mainly methane or CH<sub>4</sub>), recycle captured CO<sub>2</sub>, and produce valuable syngas. Promoters (e.g., CeO<sub>2</sub> and MgO) on Ni/Al<sub>2</sub>O<sub>3</sub> prepared by atomic layer deposition (ALD) and ALD-prepared ultrathin overcoating (e.g., ZrO<sub>2</sub> and CeO<sub>x</sub>) on Ni/Al<sub>2</sub>O<sub>3</sub> prepared by incipient wetness method were investigated for methane reforming.</p> <p>MgO and CeO<sub>2</sub> prepared by traditional incipient wetness method were used to promote the performance of ALD-prepared Ni nanoparticles (NPs) supported on four-channel α-Al<sub>2</sub>O<sub>3</sub> hollow fibers and Al<sub>2</sub>O<sub>3</sub> NPs support for DRM. CeO2 could help release NiO from inactive NiAl<sub>2</sub>O<sub>4</sub>. MgO could introduce surface oxygen and enhanced the adsorption of CO<sub>2</sub>.</p> <p>ALD technique could effectively deposit highly dispersed Ni NPs (average size of 4.3 nm) on multiple 20-cm long four-channel α-Al<sub>2</sub>O<sub>3</sub> hollow fibers for DRM. The design of a fixed bed reactor and better distribution of gas flow in the reactor could significantly improve the performance of Ni/Al<sub>2</sub>O<sub>3</sub>-HF catalysts by reducing the void space.</p> <p>ALD-prepared ultrathin ZrO<sub>2</sub> or CeO<sub>x</sub> overcoating was used to promote Ni/Al<sub>2</sub>O<sub>3</sub> catalyst for methane reforming. During the reduction process, ZrO<sub>2</sub> ALD overcoating cracked and exposed the active Ni NPs and generated oxygen vacancy. CeO<sub>x</sub> ALD overcoating exhibited a sub-stoichiometric form with oxygen vacancy-rich property\"--Abstract, p. iv</p>","abstract_html":"&lt;p&gt;&quot;Dry reforming of methane (DRM) could be a promising choice to utilize natural gas (mainly methane or CH&lt;sub&gt;4&lt;/sub&gt;), recycle captured CO&lt;sub&gt;2&lt;/sub&gt;, and produce valuable syngas. Promoters (e.g., CeO&lt;sub&gt;2&lt;/sub&gt; and MgO) on Ni/Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; prepared by atomic layer deposition (ALD) and ALD-prepared ultrathin overcoating (e.g., ZrO&lt;sub&gt;2&lt;/sub&gt; and CeO&lt;sub&gt;x&lt;/sub&gt;) on Ni/Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; prepared by incipient wetness method were investigated for methane reforming.&lt;/p&gt; &lt;p&gt;MgO and CeO&lt;sub&gt;2&lt;/sub&gt; prepared by traditional incipient wetness method were used to promote the performance of ALD-prepared Ni nanoparticles (NPs) supported on four-channel α-Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; hollow fibers and Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; NPs support for DRM. CeO2 could help release NiO from inactive NiAl&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt;. MgO could introduce surface oxygen and enhanced the adsorption of CO&lt;sub&gt;2&lt;/sub&gt;.&lt;/p&gt; &lt;p&gt;ALD technique could effectively deposit highly dispersed Ni NPs (average size of 4.3 nm) on multiple 20-cm long four-channel α-Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; hollow fibers for DRM. The design of a fixed bed reactor and better distribution of gas flow in the reactor could significantly improve the performance of Ni/Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;-HF catalysts by reducing the void space.&lt;/p&gt; &lt;p&gt;ALD-prepared ultrathin ZrO&lt;sub&gt;2&lt;/sub&gt; or CeO&lt;sub&gt;x&lt;/sub&gt; overcoating was used to promote Ni/Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; catalyst for methane reforming. During the reduction process, ZrO&lt;sub&gt;2&lt;/sub&gt; ALD overcoating cracked and exposed the active Ni NPs and generated oxygen vacancy. CeO&lt;sub&gt;x&lt;/sub&gt; ALD overcoating exhibited a sub-stoichiometric form with oxygen vacancy-rich property&quot;--Abstract, p. iv&lt;/p&gt;","abstract_has_math":false,"creators":["Jin, Baitang"],"institution":"Missouri University of Science and Technology","degree_name":"Ph. D. in Chemical Engineering","degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":null,"date_issued":"","date_published":null,"updated_at":"2026-07-24T03:18:18Z","subjects":["Chemical Engineering","Engineering"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://scholarsmine.mst.edu/doctoral_dissertations/3212","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Jin, Baitang"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:type","label":"Dc Type","values":["Dissertation - Open Access"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph. 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Promoters (e.g., CeO<sub>2</sub> and MgO) on Ni/Al<sub>2</sub>O<sub>3</sub> prepared by atomic layer deposition (ALD) and ALD-prepared ultrathin overcoating (e.g., ZrO<sub>2</sub> and CeO<sub>x</sub>) on Ni/Al<sub>2</sub>O<sub>3</sub> prepared by incipient wetness method were investigated for methane reforming.</p> <p>MgO and CeO<sub>2</sub> prepared by traditional incipient wetness method were used to promote the performance of ALD-prepared Ni nanoparticles (NPs) supported on four-channel α-Al<sub>2</sub>O<sub>3</sub> hollow fibers and Al<sub>2</sub>O<sub>3</sub> NPs support for DRM. CeO2 could help release NiO from inactive NiAl<sub>2</sub>O<sub>4</sub>. MgO could introduce surface oxygen and enhanced the adsorption of CO<sub>2</sub>.</p> <p>ALD technique could effectively deposit highly dispersed Ni NPs (average size of 4.3 nm) on multiple 20-cm long four-channel α-Al<sub>2</sub>O<sub>3</sub> hollow fibers for DRM. The design of a fixed bed reactor and better distribution of gas flow in the reactor could significantly improve the performance of Ni/Al<sub>2</sub>O<sub>3</sub>-HF catalysts by reducing the void space.</p> <p>ALD-prepared ultrathin ZrO<sub>2</sub> or CeO<sub>x</sub> overcoating was used to promote Ni/Al<sub>2</sub>O<sub>3</sub> catalyst for methane reforming. During the reduction process, ZrO<sub>2</sub> ALD overcoating cracked and exposed the active Ni NPs and generated oxygen vacancy. CeO<sub>x</sub> ALD overcoating exhibited a sub-stoichiometric form with oxygen vacancy-rich property\"--Abstract, p. iv</p>"]},{"key":"dc:title","label":"Title","values":["ENGINEERING NI/AL2O3 CATALYSTS BY ATOMIC LAYER DEPOSITION FOR METHANE REFORMING"]}]}],"canonical_facts":{"dc:creator":["Jin, Baitang"],"dc:description.abstract":["<p>\"Dry reforming of methane (DRM) could be a promising choice to utilize natural gas (mainly methane or CH<sub>4</sub>), recycle captured CO<sub>2</sub>, and produce valuable syngas. Promoters (e.g., CeO<sub>2</sub> and MgO) on Ni/Al<sub>2</sub>O<sub>3</sub> prepared by atomic layer deposition (ALD) and ALD-prepared ultrathin overcoating (e.g., ZrO<sub>2</sub> and CeO<sub>x</sub>) on Ni/Al<sub>2</sub>O<sub>3</sub> prepared by incipient wetness method were investigated for methane reforming.</p> <p>MgO and CeO<sub>2</sub> prepared by traditional incipient wetness method were used to promote the performance of ALD-prepared Ni nanoparticles (NPs) supported on four-channel α-Al<sub>2</sub>O<sub>3</sub> hollow fibers and Al<sub>2</sub>O<sub>3</sub> NPs support for DRM. CeO2 could help release NiO from inactive NiAl<sub>2</sub>O<sub>4</sub>. MgO could introduce surface oxygen and enhanced the adsorption of CO<sub>2</sub>.</p> <p>ALD technique could effectively deposit highly dispersed Ni NPs (average size of 4.3 nm) on multiple 20-cm long four-channel α-Al<sub>2</sub>O<sub>3</sub> hollow fibers for DRM. The design of a fixed bed reactor and better distribution of gas flow in the reactor could significantly improve the performance of Ni/Al<sub>2</sub>O<sub>3</sub>-HF catalysts by reducing the void space.</p> <p>ALD-prepared ultrathin ZrO<sub>2</sub> or CeO<sub>x</sub> overcoating was used to promote Ni/Al<sub>2</sub>O<sub>3</sub> catalyst for methane reforming. During the reduction process, ZrO<sub>2</sub> ALD overcoating cracked and exposed the active Ni NPs and generated oxygen vacancy. CeO<sub>x</sub> ALD overcoating exhibited a sub-stoichiometric form with oxygen vacancy-rich property\"--Abstract, p. iv</p>"],"dc:identifier":["https://scholarsmine.mst.edu/doctoral_dissertations/3212"],"dc:subject":["Chemical Engineering","Engineering"],"dc:title":["ENGINEERING NI/AL2O3 CATALYSTS BY ATOMIC LAYER DEPOSITION FOR METHANE REFORMING"],"dc:type":["Dissertation - Open Access"],"thesis:degree_name":["Ph. D. in Chemical Engineering"],"thesis:institution_name":["Missouri University of Science and Technology"]},"updated_at":"2026-07-24T03:18:18Z"}