{"id":255,"date":"2013-03-06T13:51:07","date_gmt":"2013-03-06T11:51:07","guid":{"rendered":"http:\/\/www.eubia.org\/cms\/biomass-pelleting\/"},"modified":"2018-06-12T16:03:20","modified_gmt":"2018-06-12T14:03:20","slug":"biomass-pelleting","status":"publish","type":"page","link":"https:\/\/www.eubia.org\/cms\/wiki-biomass\/biomass-pelleting\/","title":{"rendered":"Biomass pelleting"},"content":{"rendered":"<h3><span style=\"color: #339966;\">Densification-related advantages<\/span><\/h3>\n<p>Some practical problems are associated with the use of biomass material (sawdust, wood chips or agricultural residues) as fuel. Those problems are mainly related to the high bulk volume, which results in high transportation costs and requires large storage capacities, and to the high moisture content which can result in biological degradation as well as in freezing and blocking the in-plant transportation systems. In addition, variations in moisture content make difficult an optimal plant operation and process control. All those problems may be overcome by densification, which consists in compressing the material to give it more uniform properties.<\/p>\n<p><strong>The main advantages of densified fuels, compared to non-densified ones are the following:<\/strong><\/p>\n<ul style=\"list-style-type: square;\">\n<li>An increased bulk density (from 80-150 kg\/m3 for straw or 200 kg\/m3 for sawdust to 600-700 kg\/m3 after densification), resulting in lower transportation costs, reduced storage volume and easier handling.<\/li>\n<li>A lower moisture content (humidity &lt;10%), favouring a long conservation and minor losses of product during the storage period.<\/li>\n<li>An increased energy density and more homogeneous composition, resulting in better combustion control possibilities and thereby higher energy efficiency during combustion.<\/li>\n<\/ul>\n<p>The major disadvantage is the relatively high-energy cost for the pelleting process, increasing the price of the end product.<\/p>\n<p>Densified products can be found as briquettes or as pellets. The heating value, moisture content and chemical characteristics are about the same for both but the density and strength are somewhat higher for pellets. The major difference is the size (generally \u00d8 6 to 12 mm, with a length 4 to 5 times the \u00d8 for pellets), making them easy to use in fully automatic operation, from household appliances to large-scale combined heat and power (CHP) plants.<\/p>\n<p><strong>Comparison between briquettes and pellets<\/strong><\/p>\n<table style=\"height: 820px;\" border=\"0\" width=\"822\">\n<tbody>\n<tr>\n<td style=\"background-color: #1bb314; height: 30px; text-align: center; border: 1px solid #1bb314;\"><\/td>\n<td style=\"background-color: #1bb314; height: 30px; text-align: center;\"><span style=\"color: #ffffff;\">Pellet<\/span><\/td>\n<td style=\"background-color: #1bb314; height: 30px; text-align: center;\"><span style=\"color: #ffffff;\">\u00a0Briquette<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #ffffff;\">Appearance<\/td>\n<td style=\"background-color: #ffffff;\"><img fetchpriority=\"high\" decoding=\"async\" class=\" size-full wp-image-253\" src=\"http:\/\/www.eubia.org\/cms\/wp-content\/uploads\/2013\/03\/images_aboutebiomass_RTEmagicC_VAPO_pellets_picture1.jpg.jpg\" alt=\"RTEmagicC VAPO pellets picture1.jpg\" width=\"300\" height=\"206\" \/><\/td>\n<td style=\"background-color: #ffffff;\"><img decoding=\"async\" class=\" size-full wp-image-254\" src=\"http:\/\/www.eubia.org\/cms\/wp-content\/uploads\/2013\/03\/images_aboutebiomass_RTEmagicC_RUF1_01.jpg.jpg\" alt=\"RTEmagicC RUF1 01.jpg\" width=\"300\" height=\"185\" \/><\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #ffffff;\">Raw Material<\/td>\n<td style=\"background-color: #ffffff;\">\u00a0Dry and grinded wood or agricultural residues<\/td>\n<td style=\"background-color: #ffffff;\">\u00a0Dry and grinded wood or agricultural residues. Raw material can be more coarse than for pelleting, due to the larger dimensions of final product<\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #ffffff;\">Shape<\/td>\n<td style=\"background-color: #ffffff;\">\u00a0Cylindrical (generally \u00d8 6 to 12 mm, with a length 4 to 5 times the \u00d8).<\/td>\n<td style=\"background-color: #ffffff;\">\u00a0Cylindrical (generally \u00d8 80 to 90 mm) or parallelepiped (150*70*60 mm)<\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #ffffff;\">Struture<\/td>\n<td style=\"background-color: #ffffff;\">\u00a0Stable, hard, without dust<\/td>\n<td style=\"background-color: #ffffff;\">\u00a0Relatively friable, fragile<\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #ffffff;\">Bulk Density<\/td>\n<td style=\"background-color: #ffffff;\">\u00a0Min. 650 kg\/m<sup>3<\/sup><\/td>\n<td style=\"background-color: #ffffff;\">\u00a0600 to 700 kg\/m<sup>3<\/sup><\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #ffffff;\">Aspect<\/td>\n<td style=\"background-color: #ffffff;\">\u00a0&#8220;Smooth&#8221;<\/td>\n<td style=\"background-color: #ffffff;\">\u00a0Mostly &#8220;rough&#8221;<\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #ffffff;\">Transport<\/td>\n<td style=\"background-color: #ffffff;\">\u00a0Bulk, bags, big bags<\/td>\n<td style=\"background-color: #ffffff;\">\u00a0Unit, palet<\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #ffffff;\">Handling<\/td>\n<td style=\"background-color: #ffffff;\">\u00a0Manual or automatic use<\/td>\n<td style=\"background-color: #ffffff;\">\u00a0Manual use<\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #1bb314;\" colspan=\"2\"><strong><span style=\"color: black;\">Pellet characteristics for domestic use<\/span><\/strong><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #ffffff;\"><span style=\"color: #333333;\">Heating value<\/span><\/td>\n<td style=\"background-color: #ffffff;\"><span style=\"color: #333333;\">\u00a0&gt; 4,7 kWh (&gt;17 MJ\/kg)<\/span><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #ffffff;\"><span style=\"color: #333333;\">Moisture content<\/span><\/td>\n<td style=\"background-color: #ffffff;\"><span style=\"color: #333333;\">\u00a0Max. 10%<\/span><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #ffffff;\"><span style=\"color: #333333;\">Ash content<\/span><\/td>\n<td style=\"background-color: #ffffff;\"><span style=\"color: #333333;\">\u00a0Max. 0.5%<\/span><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #ffffff;\"><span style=\"color: #333333;\">Dimension<\/span><\/td>\n<td style=\"background-color: #ffffff;\"><span style=\"color: #333333;\">\u00a0Diameter: 6 mm; Length: 25 mm<\/span><\/td>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u00a0<\/strong><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Densification-related advantages Some practical problems are associated with the use of biomass material (sawdust, wood chips or agricultural residues) as fuel. Those problems are mainly related to the high bulk volume, which results in high transportation costs and requires large storage capacities, and to the high moisture content which can result in biological degradation as [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":964,"menu_order":155,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-255","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.eubia.org\/cms\/wp-json\/wp\/v2\/pages\/255","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.eubia.org\/cms\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.eubia.org\/cms\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.eubia.org\/cms\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eubia.org\/cms\/wp-json\/wp\/v2\/comments?post=255"}],"version-history":[{"count":4,"href":"https:\/\/www.eubia.org\/cms\/wp-json\/wp\/v2\/pages\/255\/revisions"}],"predecessor-version":[{"id":4346,"href":"https:\/\/www.eubia.org\/cms\/wp-json\/wp\/v2\/pages\/255\/revisions\/4346"}],"up":[{"embeddable":true,"href":"https:\/\/www.eubia.org\/cms\/wp-json\/wp\/v2\/pages\/964"}],"wp:attachment":[{"href":"https:\/\/www.eubia.org\/cms\/wp-json\/wp\/v2\/media?parent=255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}