{"id":45299,"date":"2025-08-14T19:57:24","date_gmt":"2025-08-14T19:57:24","guid":{"rendered":"https:\/\/www.alicat.com\/?p=45299"},"modified":"2026-01-06T22:33:16","modified_gmt":"2026-01-06T22:33:16","slug":"acetylen-analyse-in-einer-cid1-umgebung","status":"publish","type":"post","link":"https:\/\/www.alicat.com\/de\/articles\/acetylene-analysis-in-a-cid1-environment\/","title":{"rendered":"Acetylen-Analyse in einem Labor f\u00fcr \u00d6l- und Gasprozesse"},"content":{"rendered":"

[et_pb_section fb_built=”1″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_row _builder_version=”4.27.4″ _module_preset=”default” custom_padding=”2em||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_heading title=”Acetylene Sample Analysis in a CID1 Hazardous Location ” _builder_version=”4.27.4″ _module_preset=”default” custom_css_free_form=”selector h1 {|| text-wrap: pretty;||}” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_heading][et_pb_image src=”https:\/\/www.alicat.com\/wp-content\/uploads\/2025\/08\/AdobeStock_442447903.webp” alt=”oil and gas process lines” align=”center” force_fullwidth=”on” _builder_version=”4.27.5″ _module_preset=”default” custom_margin=”1.5rem||||false|false” hover_enabled=”0″ custom_css_free_form=”selector img {|| object-fit: cover;||}” global_colors_info=”{}” theme_builder_area=”post_content” module_id=”article-hero-image” sticky_enabled=”0″][\/et_pb_image][et_pb_divider color=”#2A3B47″ divider_weight=”2.5px” _builder_version=”4.27.4″ _module_preset=”default” height=”0px” custom_margin=”3rem||3rem||true|false” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_divider][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.4″ _module_preset=”default” custom_padding=”0px||0px||true|false” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||2rem||false|false” global_colors_info=”{}” theme_builder_area=”post_content”]In steam cracking operations<\/a>, hydrocarbon feedstocks are thermally broken down to produce light olefins, with ethylene as the primary target product. Precise flow control is essential in these processes to enable to effective analysis and disposal of unwanted byproducts, such as acetylene (C2<\/sub>H2<\/sub>).<\/p>\n

Even in small concentrations, acetylene is highly reactive and unstable. Its presence in ethylene production can disrupt downstream processes and increase the risk of reactions. To address this, some cracking facilities incorporate thermal\u2011catalytic hydrogenation systems to catalyze acetylene and increase ethylene yields. While effective, the selective removal of acetylene must be tightly controlled to\u00a0avoid under\u2011 or over\u2011conversion,<\/a> both of which can impact product quality and safety.<\/p>\n

As such, monitoring the effectiveness of this removal while ensuring trace levels of acetylene remain within acceptable limits requires regular and precise gas sampling. While many facilities use online analyzers for continuous process control, post\u2011hydrogenation acetylene analysis is often conducted through closed\u2011loop lab\u2011based sampling. These laboratories provide actionable data that helps confirm both process efficiency and operational safety.[\/et_pb_text][et_pb_heading title=”Case study: closed loop sample line” _builder_version=”4.27.4″ _module_preset=”default” title_level=”h3″ global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_heading][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||2rem||false|false” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

In a North American process laboratory operating within a Class 1, Division 1 (C1D1) hazardous area, a gas sampling system monitored post-hydrogenation acetylene conversion from a side\u2011stream off the main process line. A portion of the hydrogenated gas was diverted through a sample tap and conveyed via an electrically heated transfer line to prevent premature condensation before cooling. The sample then entered a thermally insulated icebox containing an impinger train, where it was deliberately chilled to condense and remove volatile components and particulates.<\/p>\n

After preconditioning in the ice bath, the sample was routed through an Alicat\u00ae<\/sup> Scientific IS-Max\u2122 mass flow controller<\/a> and into a gas analyzer to verify that residual acetylene concentrations were reduced to safe operating levels. The IS\u2011MAX maintained a precise 0\u00a0\u2013\u00a0200 CCM sampling flow rate at an inlet pressure of 15 PSIG, with setpoints controlled by a central PLC via Modbus RTU over RS\u2011485. Its \u00b1\u00a00.5% of reading or \u00b1\u00a00.1% of full\u2011scale accuracy ensured stable flow and prevented sample loss or pressure fluctuations that could compromise trace measurements.<\/p>\n

[\/et_pb_text][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” module_alignment=”center” custom_margin=”||0px||false|false” custom_padding=”||2rem||false|false” custom_padding_last_edited=”off|desktop” custom_css_free_form=”selector figure {|| display: table;|| margin-left: auto;|| margin-right: auto;|| text-align: center;||}||||selector figcaption {|| caption-side: bottom;|| display: table-caption;||}||||selector img {|| margin-bottom: 1rem;||}” locked=”off” global_colors_info=”{}” custom_css_main_element_last_edited=”on|phone” theme_builder_area=”post_content”]<\/p>\n

\"Acetylene<\/figure>\n

[\/et_pb_text][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||2rem||false|false” global_colors_info=”{}” theme_builder_area=”post_content”]Using laminar differential pressure sensing, the IS‑MAX displayed real‑time mass flow, pressure, temperature, and volumetric flow, with capability to monitor up to 13 parameters including barometric, gauge, and absolute pressure, temperature, humidity, and totalized flow. When transmitted to the PLC, these parameters provide both process control and diagnostic insight, enabling operators to verify sample integrity, detect upstream or downstream pressure changes, monitor for condensation or heating issues, and correlate totalized flow with analyzer data for traceability. With sampling response time as low as 30 ms, the controller supported high‑throughput analysis while maintaining accuracy and system stability.[\/et_pb_text][et_pb_heading title=”Outcome” _builder_version=”4.27.4″ _module_preset=”default” title_level=”h3″ global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_heading][et_pb_image src=”https:\/\/www.alicat.com\/wp-content\/uploads\/2025\/04\/is-max-flow-controller-220×300.webp” alt=”Alicat IS-Max 1 SLPM intrinsically safe mass flow controller” align_tablet=”” align_phone=”center” align_last_edited=”on|phone” _builder_version=”4.27.4″ _module_preset=”default” max_width=”50%” custom_padding=”||2rem|2rem|false|false” custom_padding_tablet=”||2rem|2rem|false|false” custom_padding_phone=”||2rem|0rem|false|false” custom_padding_last_edited=”on|phone” custom_css_main_element=”float: right;” global_colors_info=”{}” custom_css_main_element_last_edited=”on|phone” custom_css_main_element_phone=”float: none;” custom_css_main_element_tablet=”float: right;” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||2rem||false|false” custom_padding=”||2px|||” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

In off\u2011stream sampling systems where gas is not returned to the process line, steady, traceable flow is essential for reliably quantifying contaminants such as acetylene. The IS\u2011Max is the industry\u2019s first fully integrated mass flow controller to achieve both C1D1 and Zone 0 certification. Unlike most intrinsically safe systems, which require separate flow\/pressure sensors and external control hardware, Alicat\u2019s design integrates sensing and actuation into a single instrument. This reduces system complexity, minimizes wiring, shortens installation time, and improves safety while maintaining high measurement accuracy and fast control response.<\/p>\n

Other intrinsically safe instrumentation may provide basic flow indication, limited pressure control, or standalone data logging, but the IS\u2011MAX combines all of these functions with active compensation for pressure changes, precise closed\u2011loop flow control, and direct integration with plant digital control systems to deliver a complete solution for high\u2011precision, automated sampling.<\/p>\n

The benefits extend beyond this single process. In the wider oil and gas industry, achieving high\u2011precision, intrinsically safe flow control in a compact, integrated package reduces the footprint and complexity of sampling systems, improves compliance with hazardous\u2011area requirements, and cuts downtime for maintenance or reconfiguration. For operators, that translates into lower total cost of ownership, higher uptime, and more consistent data quality across multiple facilities. Technologies like the IS\u2011Max support safer operations, strengthening both regulatory compliance and efficiency in safety\u2011critical environments worldwide.<\/p>\n

[\/et_pb_text][et_pb_text module_class=”cta-link” _builder_version=”4.27.4″ _module_preset=”default” text_font=”|700|||||||” custom_margin=”||2rem||false|false” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”]Keep reading: Pressure vessel regulation in gas and oil infrastructure $<\/span><\/a>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

In steam cracking operations, hydrocarbon feedstocks are thermally broken down to produce light olefins, with ethylene as the primary target product. Precise flow control is essential in these processes to enable to effective analysis and disposal of unwanted byproducts, such as acetylene (C2H2). Even in small concentrations, acetylene is highly reactive and unstable. Its presence […]<\/p>\n","protected":false},"author":7,"featured_media":45375,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"1400","content-type":"","_searchwp_excluded":"","footnotes":""},"categories":[113,135],"tags":[],"class_list":["post-45299","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-intrinsically-safe","category-is-max"],"acf":[],"yoast_head":"\nAcetylene Analysis in an Oil and Gas Process Lab - Alicat Scientific<\/title>\n<meta name=\"description\" content=\"Safe and precise acetylene sampling in C1D1 lab is ensured by repeatable mass flow control instruments like the IS Max\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alicat.com\/de\/artikel\/acetylen-analyse-in-einer-cid1-umgebung\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Acetylene Analysis in an Oil and Gas Process Lab\" \/>\n<meta property=\"og:description\" content=\"Safe and precise acetylene sampling in C1D1 lab is ensured by repeatable mass flow control instruments like the IS Max\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.alicat.com\/de\/artikel\/acetylen-analyse-in-einer-cid1-umgebung\/\" \/>\n<meta property=\"og:site_name\" content=\"Alicat Scientific\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/alicatscientific\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-14T19:57:24+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-06T22:33:16+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.alicat.com\/wp-content\/uploads\/2025\/08\/impinger_featured_image.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Alicat Scientific\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Alicat Scientific\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.alicat.com\\\/articles\\\/acetylene-analysis-in-a-cid1-environment\\\/\",\"url\":\"https:\\\/\\\/www.alicat.com\\\/articles\\\/acetylene-analysis-in-a-cid1-environment\\\/\",\"name\":\"Acetylene Analysis in an Oil and Gas Process Lab - 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