CN106268836A - 一种具有优异低温还原性的石油烃制氢预转化催化剂 - Google Patents
一种具有优异低温还原性的石油烃制氢预转化催化剂 Download PDFInfo
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Abstract
本发明公开了一种具有优异低温还原性的石油烃制氢预转化催化剂，涉及催化剂制备技术领域，具体制备步骤为：(1)载体制备，(2)活性组分溶液配制，(3)催化剂制备。本发明所制石油烃制氢预转化催化剂具有制备成本低、机械强度好的特点，活性组分在载体上的负载率高，达到15％以上；并且具有优异的低温还原性，使石油烃制氢预转化反应能够在350‑450℃下反应，同时抗积碳能力强，预转化出口C2+含量低。
Description
技术领域：
本发明涉及催化剂制备技术领域，具体涉及一种具有优异低温还原性的石油烃制氢预转化催化剂。
背景技术：
烃类蒸汽转化工艺是目前国内外炼油企业普遍采用的制氢工艺，随着制氢装置节能降耗要求的不断提高和制氢工艺技术的进步，烃类预转化技术被越来越多的装置使用，预转化技术具有降低转化炉负荷、优化并稳定转化炉操作、提高装置热效率、降低装置建设投资等诸多优点。催化剂的选用是石油烃制氢预转化的关键，国内外较为成熟的预转化催化剂如CN-14、G1-80、CRG-F、RKNGR型预转化催化剂均不同程度存在着低温活性差、稳定性差和反应器出口C2+含量高等问题，因此亟需开发新型石油烃制氢预转化催化剂。
发明内容：
本发明所要解决的技术问题在于提供一种制备成本低、可多次回收套用且具有优异低温还原性的石油烃制氢预转化催化剂。
本发明所要解决的技术问题采用以下的技术方案来实现：
一种具有优异低温还原性的石油烃制氢预转化催化剂，具体制备步骤为：
(1)载体制备：将空心陶瓷球和纳米氧化铝按重量比3:1加入3-5倍总重量的乙醇中，充分分散后于微波频率2450MHz、功率700W下微波处理10min，然后于40-50℃下缓慢烘干，所得固体再经功率22kW、转速720r/min球磨机球磨2-3h，最后先于550-600℃下焙烧2h，再于1100-1200℃下焙烧1h，即得载体；
(2)活性组分溶液配制：将二氧化钛、镍和氧化镧按重量比2:1:0.2加入质量浓度20％稀硝酸水溶液中，搅拌下加热至回流状态使其完全溶解，然后自然冷却至55-65℃保温1h，最后继续自然冷却至室温，即得活性组分溶液；
(3)催化剂制备：向上述所制活性组分溶液中加入制得的载体，先于微波频率2450MHz、功率700W下微波处理5min，再于超声频率40kHz、功率50W下超声处理30min，处理结束后于0-5℃下静置3h，然后转入室温下使混合物自然恢复到室温，过滤，将所得滤饼于100-110℃下烘干，最后于500-550℃下焙烧3h后研磨成粉末，即得催化剂。
本发明的有益效果是：本发明所制石油烃制氢预转化催化剂具有制备成本低、机械强度好的特点，活性组分在载体上的负载率高，达到15％以上；并且具有优异的低温还原性，使石油烃制氢预转化反应能够在350-450℃下反应，同时抗积碳能力强，预转化出口C2+含量低。
具体实施方式：
为了使本发明实现的技术手段、创作特征、达成目的与功效易于明白了解，下面结合具体实施例，进一步阐述本发明。
实施例1
(1)载体制备：将空心陶瓷球和纳米氧化铝按重量比3:1加入5倍总重量的乙醇中，充分分散后于微波频率2450MHz、功率700W下微波处理10min，然后于40-50℃下缓慢烘干，所得固体再经功率22kW、转速720r/min球磨机球磨3h，最后先于550℃下焙烧2h，再于1200℃下焙烧1h，即得载体；
(2)活性组分溶液配制：将二氧化钛、镍和氧化镧按重量比2:1:0.2加入质量浓度20％稀硝酸水溶液中，搅拌下加热至回流状态使其完全溶解，然后自然冷却至55℃保温1h，最后继续自然冷却至室温，即得活性组分溶液；
(3)催化剂制备：向上述所制活性组分溶液中加入制得的载体，先于微波频率2450MHz、功率700W下微波处理5min，再于超声频率40kHz、功率50W下超声处理30min，处理结束后于0-5℃下静置3h，然后转入室温下使混合物自然恢复到室温，过滤，将所得滤饼于100℃下烘干，最后于500℃下焙烧3h后研磨成粉末，即得催化剂。
实施例2
(1)载体制备：将空心陶瓷球和纳米氧化铝按重量比3:1加入3倍总重量的乙醇中，充分分散后于微波频率2450MHz、功率700W下微波处理10min，然后于40-50℃下缓慢烘干，所得固体再经功率22kW、转速720r/min球磨机球磨2h，最后先于600℃下焙烧2h，再于1100℃下焙烧1h，即得载体；
(2)活性组分溶液配制：将二氧化钛、镍和氧化镧按重量比2:1:0.2加入质量浓度20％稀硝酸水溶液中，搅拌下加热至回流状态使其完全溶解，然后自然冷却至65℃保温1h，最后继续自然冷却至室温，即得活性组分溶液；
(3)催化剂制备：向上述所制活性组分溶液中加入制得的载体，先于微波频率2450MHz、功率700W下微波处理5min，再于超声频率40kHz、功率50W下超声处理30min，处理结束后于0-5℃下静置3h，然后转入室温下使混合物自然恢复到室温，过滤，将所得滤饼于100℃下烘干，最后于550℃下焙烧3h后研磨成粉末，即得催化剂。
以上显示和描述了本发明的基本原理和主要特征和本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。
Claims (1)
1.一种具有优异低温还原性的石油烃制氢预转化催化剂，其特征在于，具体制备步骤为：
(1)载体制备：将空心陶瓷球和纳米氧化铝按重量比3:1加入3-5倍总重量的乙醇中，充分分散后于微波频率2450MHz、功率700W下微波处理10min，然后于40-50℃下缓慢烘干，所得固体再经功率22kW、转速720r/min球磨机球磨2-3h，最后先于550-600℃下焙烧2h，再于1100-1200℃下焙烧1h，即得载体；
(2)活性组分溶液配制：将二氧化钛、镍和氧化镧按重量比2:1:0.2加入质量浓度20％稀硝酸水溶液中，搅拌下加热至回流状态使其完全溶解，然后自然冷却至55-65℃保温1h，最后继续自然冷却至室温，即得活性组分溶液；
(3)催化剂制备：向上述所制活性组分溶液中加入制得的载体，先于微波频率2450MHz、功率700W下微波处理5min，再于超声频率40kHz、功率50W下超声处理30min，处理结束后于0-5℃下静置3h，然后转入室温下使混合物自然恢复到室温，过滤，将所得滤饼于100-110℃下烘干，最后于500-550℃下焙烧3h后研磨成粉末，即得催化剂。
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631767A (zh) * | 2004-11-02 | 2005-06-29 | 中国石油化工集团公司 | 一种烃类制氢催化剂及其制备方法 |
| CN101791556A (zh) * | 2010-03-23 | 2010-08-04 | 北京科技大学 | 一种辛醇加氢精制催化剂及其制备方法 |
| CN102836721A (zh) * | 2011-06-20 | 2012-12-26 | 山东公泉化工股份有限公司 | 烃类转化制氢催化剂的制备方法 |
| CN103816920A (zh) * | 2012-11-16 | 2014-05-28 | 中国石油天然气股份有限公司 | 一种石油烃制氢预转化催化剂的制备方法 |
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Patent Citations (4)
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| CN1631767A (zh) * | 2004-11-02 | 2005-06-29 | 中国石油化工集团公司 | 一种烃类制氢催化剂及其制备方法 |
| CN101791556A (zh) * | 2010-03-23 | 2010-08-04 | 北京科技大学 | 一种辛醇加氢精制催化剂及其制备方法 |
| CN102836721A (zh) * | 2011-06-20 | 2012-12-26 | 山东公泉化工股份有限公司 | 烃类转化制氢催化剂的制备方法 |
| CN103816920A (zh) * | 2012-11-16 | 2014-05-28 | 中国石油天然气股份有限公司 | 一种石油烃制氢预转化催化剂的制备方法 |
Non-Patent Citations (1)
| Title |
|---|
| 潘蕙芳等: "氧化钛对烃类蒸汽转化制氢催化剂活性的影响", 《齐鲁石油化工》 * |
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