{"id":164517,"date":"2025-06-24T07:23:00","date_gmt":"2025-06-24T05:23:00","guid":{"rendered":"https:\/\/renewable-carbon.eu\/news\/?p=164517"},"modified":"2025-06-16T13:25:53","modified_gmt":"2025-06-16T11:25:53","slug":"direct-synthesis-of-para-xylene-from-co2-hydrogenation-with-a-record-high-space-time-yield","status":"publish","type":"post","link":"https:\/\/renewable-carbon.eu\/news\/direct-synthesis-of-para-xylene-from-co2-hydrogenation-with-a-record-high-space-time-yield\/","title":{"rendered":"Direct Synthesis of\u00a0para-Xylene from CO2 Hydrogenation with a Record-High Space-Time Yield"},"content":{"rendered":"\n\n\n<p>The direct synthesis of\u00a0<em>para<\/em>-xylene (<em>p<\/em>-X) from CO<sub>2<\/sub>\u00a0hydrogenation with high space-time yield (STY) remains a significant challenge due to two primary limitations: the Anderson\u2013Schulz\u2013Flory distribution, which restricts the C<sub>8<\/sub>selectivity to \u223c6.8 C%, and the thermodynamic equilibrium, which confines the\u00a0<em>p<\/em>-X content among xylene isomers to 15\u201325%. Herein, we report a composite catalyst, K-FeMn\/Hollow ZSM-5, that enables the efficient hydrogenation of CO<sub>2<\/sub>\u00a0to\u00a0<em>p<\/em>-X by integrating two synergistic catalytic functions. The K-FeMn component facilitates the reverse water-gas shift reaction and Fischer\u2013Tropsch synthesis to olefin processes, generating light olefin intermediates. <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"406\" src=\"https:\/\/renewable-carbon.eu\/news\/media\/2025\/06\/ja5c03380_0006.webp\" alt=\"\" class=\"wp-image-164546\" srcset=\"https:\/\/renewable-carbon.eu\/news\/media\/2025\/06\/ja5c03380_0006.webp 500w, https:\/\/renewable-carbon.eu\/news\/media\/2025\/06\/ja5c03380_0006-300x244.webp 300w, https:\/\/renewable-carbon.eu\/news\/media\/2025\/06\/ja5c03380_0006-150x122.webp 150w, https:\/\/renewable-carbon.eu\/news\/media\/2025\/06\/ja5c03380_0006-333x270.webp 333w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/figure><\/div>\n\n\n<p>These intermediates are subsequently transformed to\u00a0<em>p<\/em>-X within the hollow ZSM-5 zeolite through oligomerization, cyclization, and aromatization. The hollow ZSM-5 features a suitable pore size to facilitate\u00a0<em>p<\/em>-X diffusion only, while its passivated external acid sites effectively suppress isomerization and alkylation of\u00a0<em>p<\/em>-X outside the zeolite. As a result, the K-FeMn\/Hollow ZSM-5 catalyst achieves a\u00a0<em>p<\/em>-X STY of 41.7 g kg<sub>cat<\/sub><sup>\u20131<\/sup>\u00a0h<sup>\u20131<\/sup>\u00a0at a CO<sub>2<\/sub>\u00a0conversion of 46.1%, surpassing all previously reported values. This work demonstrates a novel approach to overcome the local thermodynamic equilibria by specific catalyst design and the spatial separation of processes toward CO<sub>2<\/sub>\u00a0hydrogenation into\u00a0<em>p<\/em>-X.<\/p>\n\n\n\n<p>&#8230;<\/p>\n\n\n\n<p><strong>&#8230; you may read the complete article under <a href=\"https:\/\/pubs.acs.org\/doi\/10.1021\/jacs.5c03380\">https:\/\/pubs.acs.org\/doi\/10.1021\/jacs.5c03380<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The direct synthesis of\u00a0para-xylene (p-X) from CO2\u00a0hydrogenation with high space-time yield (STY) remains a significant challenge due to two primary limitations: the Anderson\u2013Schulz\u2013Flory distribution, which restricts the C8selectivity to \u223c6.8 C%, and the thermodynamic equilibrium, which confines the\u00a0p-X content among xylene isomers to 15\u201325%. Herein, we report a composite catalyst, K-FeMn\/Hollow ZSM-5, that enables the [&#8230;]<\/p>\n","protected":false},"author":59,"featured_media":164546,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","nova_meta_subtitle":"Chinese scientists have developed a method to synthesize paraxylene using a novel catalyst, achieving a world-record efficiency","footnotes":""},"categories":[5572],"tags":[6843,10416,10743],"supplier":[26516,7471,17251],"class_list":["post-164517","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bio-based","tag-biochemicals","tag-circulareconomy","tag-useco2","supplier-anhui-university-of-technology","supplier-chinese-academy-sciences","supplier-university-of-toyama"],"_links":{"self":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/164517","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/users\/59"}],"replies":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/comments?post=164517"}],"version-history":[{"count":0,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/164517\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/media\/164546"}],"wp:attachment":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/media?parent=164517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/categories?post=164517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/tags?post=164517"},{"taxonomy":"supplier","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/supplier?post=164517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}