{"id":5371,"date":"2024-09-04T16:04:56","date_gmt":"2024-09-04T16:04:56","guid":{"rendered":"http:\/\/121.199.166.88\/?post_type=resources&#038;p=5371"},"modified":"2024-09-04T19:02:19","modified_gmt":"2024-09-04T19:02:19","slug":"evaluating-catalyst-substrates-with-the-geopyc-1360","status":"publish","type":"resources","link":"https:\/\/micromeritics.com.cn\/en\/resources\/evaluating-catalyst-substrates-with-the-geopyc-1360\/","title":{"rendered":"Evaluating Catalyst Substrates with the GeoPyc\u00ae 1360"},"content":{"rendered":"\n<p>Critical factors in operating catalytic reactors are the envelope density and porosity of the catalyst itself.<br>These properties are quickly and easily assessed with Micromeritics\u2019 new GeoPyc 1360 in conjunction<br>with Micromeritics\u2019 AccuPyc\u2122 1330.<\/p>\n\n\n\n<p>Envelope density (sometimes called bulk density) is simply the weight of a quantity of catalyst divided by<br>the volume (including the pores) of the same quantity. It may be envisioned as the density that results<br>from using a volume measured with a zero-thickness but impenetrable film stretched over the exterior of<br>each and every catalyst pellet. It is thus different from the absolute density (variously termed skeletal,<br>true, or real density) which excludes pore spaces. Porosity can be directly calculated from a measure of<br>both envelope and absolute density.<\/p>\n\n\n\n<p>The GeoPyc 1360 measures volume displacement of the catalyst with a free-flowing dry medium \u2014<br>called Dry<em>Flo<\/em>\u00ae \u2014 that conforms to exterior features but is unable to penetrate pores. Unlike other<br>methods such as mercury displacement and hot-wax dipping, the dry medium technique neither<br>contaminates nor destroys the tested sample.<\/p>\n\n\n\n<p>The following table presents results for a variety of catalyst substrates. The first is Micromeritics\u2019<br>standard reference sample (an extruded catalyst support, P\/N: 004-16822-00). The remainder is from<br>other sources as are the mercury data offered in comparison. These substrates varied in shape from<br>extrudates about 1 mm in diameter, through round beads to nearly spherical tablets 5 mm in diameter. The GeoPyc 1360 permits calibration for shape with nonporous reference objects; short pieces of wire were used to simulate the extrudate, and glass beads of appropriate sizes were used to simulate the other<br>materials.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"750\" height=\"342\" src=\"https:\/\/micromeritics.com.cn\/wp-content\/uploads\/2024\/09\/Comparative-Data-on-Catalyst-Substrates.png\" alt=\"Comparative data on catalyst substrates\" class=\"wp-image-5373\" srcset=\"https:\/\/micromeritics.com.cn\/wp-content\/uploads\/2024\/09\/Comparative-Data-on-Catalyst-Substrates.png 750w, https:\/\/micromeritics.com.cn\/wp-content\/uploads\/2024\/09\/Comparative-Data-on-Catalyst-Substrates-300x137.png 300w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><figcaption class=\"wp-element-caption\">Table 1. Comparative Data on Catalyst Substrates<\/figcaption><\/figure>\n\n\n\n<p>The greatest disparity in tabulated values amounts to 5.8%. Having tested sample No. 1 by mercury<br>porosimetry numerous times on different instruments with different operators, it is amply established that<br>these values are subject to variations as great as 3%. The table shows equally reliable results for the<br>GeoPyc.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Critical factors in operating catalytic reactors are the envelope density and porosity of the catalyst itself.These properties are quickly and easily assessed with Micromeritics\u2019 new GeoPyc 1360 in conjunctionwith Micromeritics\u2019 AccuPyc\u2122 1330. Envelope density (sometimes called bulk density) is simply the weight of a quantity of catalyst divided bythe volume (including the pores) of the [&hellip;]<\/p>\n","protected":false},"featured_media":0,"parent":0,"template":"","meta":{"_acf_changed":true},"methods":[26],"resource_type":[8],"class_list":["post-5371","resources","type-resources","status-publish","hentry","methods-density","resource_type-application-notes"],"acf":[],"_links":{"self":[{"href":"https:\/\/micromeritics.com.cn\/en\/wp-json\/wp\/v2\/resources\/5371","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/micromeritics.com.cn\/en\/wp-json\/wp\/v2\/resources"}],"about":[{"href":"https:\/\/micromeritics.com.cn\/en\/wp-json\/wp\/v2\/types\/resources"}],"wp:attachment":[{"href":"https:\/\/micromeritics.com.cn\/en\/wp-json\/wp\/v2\/media?parent=5371"}],"wp:term":[{"taxonomy":"methods","embeddable":true,"href":"https:\/\/micromeritics.com.cn\/en\/wp-json\/wp\/v2\/methods?post=5371"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/micromeritics.com.cn\/en\/wp-json\/wp\/v2\/resource_type?post=5371"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}