Article(id=1221425790093283652, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1221425781750808678, articleNumber=null, orderNo=null, doi=10.19666/j.rlfd.202206136, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1654963200000, receivedDateStr=2022-06-12, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1769140201352, onlineDateStr=2026-01-23, pubDate=1674576000000, pubDateStr=2023-01-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769140201352, onlineIssueDateStr=2026-01-23, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769140201352, creator=13701087609, updateTime=1769140201352, updator=13701087609, issue=Issue{id=1221425781750808678, tenantId=1146029695717560320, journalId=1210938733613449225, year='2023', volume='52', issue='1', pageStart='1', pageEnd='182', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769140199363, creator=13701087609, updateTime=1769145231708, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1221446888994292213, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1221425781750808678, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1221446888994292214, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1221425781750808678, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=105, endPage=110, ext={EN=ArticleExt(id=1221425792735695288, articleId=1221425790093283652, tenantId=1146029695717560320, journalId=1210938733613449225, language=EN, title=Comparative study on performance of catalysts for urea hydrolysis, columnId=1211002409397129992, journalTitle=Thermal Power Generation, columnName=Power generation technology forum, runingTitle=null, highlight=null, articleAbstract=

In order to select high activity catalysts for urea hydrolysis, the kinetic and thermodynamic characteristics of urea catalytic hydrolysis reaction were studied by using batch reactor and continuous operation pilot plant, and the effects of different catalysts on hydrolysis reaction temperature, energy consumption and variable load response time were compared. The results show that, the activation energy of the hydrolysis reaction can be reduced by adding catalyst (the activation energy of the liquid diammonium hydrogen phosphate is 65.3 kJ/mol, and that of the solid alumina is 52.9 kJ/mol), and the urea conversion can be improved. The addition of catalyst increases the hydrolysis reaction rate and decreases the hydrolysis reaction temperature. Due to uneven distribution and insufficient contact, the catalytic activity of solid alumina catalyst decreases in the continuous operation reactor. The energy consumption of ammonia production by catalytic hydrolysis is about 1%~3% lower than that of ordinary hydrolysis, and the response time of hydrolyzer changing load is not shortened by adding diammonium phosphate and alumina catalyst.

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为筛选出高活性的尿素水解催化剂,利用间歇反应釜和连续操作中试装置,对尿素催化水解反应的动力学和热力学特性进行了研究,并比较了不同催化剂对水解反应温度、能耗和变负荷响应时间的影响。结果表明:添加催化剂能够降低水解反应的活化能(液态磷酸氢二铵活化能为65.3 kJ/mol、固体氧化铝活化能为52.9 kJ/mol),并提高尿素转化率;添加催化剂能够提高水解反应速率,降低水解反应温度;在连续操作反应器中,固体氧化铝催化剂存在分布不均、接触不充分的问题,导致催化活性下降;催化水解的产氨能耗仅比普通水解降低约1%~3%,添加磷酸氢二铵和氧化铝催化剂未减小水解器的变负荷响应时间。

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向小凤(1980),女,博士,高级工程师,主要研究方向为空气污染物排放控制及清洁能源技术研究,

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向小凤(1980),女,博士,高级工程师,主要研究方向为空气污染物排放控制及清洁能源技术研究,

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尿素水解催化剂性能比较研究
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向小凤 , 张向宇 , 王志超 , 张喜来 , 张波 , 姚伟
热力发电 | 发电技术论坛 2023,52(1): 105-110
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热力发电 | 发电技术论坛 2023, 52(1): 105-110
尿素水解催化剂性能比较研究
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向小凤 , 张向宇, 王志超, 张喜来, 张波, 姚伟
作者信息
  • 西安热工研究院有限公司电站锅炉煤清洁燃烧国家工程研究中心,陕西 西安 710054
  • 向小凤(1980),女,博士,高级工程师,主要研究方向为空气污染物排放控制及清洁能源技术研究,

Comparative study on performance of catalysts for urea hydrolysis
Xiaofeng XIANG , Xiangyu ZHANG, Zhichao WANG, Xilai ZHANG, Bo ZHANG, Wei YAO
Affiliations
  • Xi'an Thermal Power Research Institute Co, Ltd & National Engineering Research Center of Clean Coal Combustion, Xi'an 710054, China
出版时间: 2023-01-25 doi: 10.19666/j.rlfd.202206136
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为筛选出高活性的尿素水解催化剂,利用间歇反应釜和连续操作中试装置,对尿素催化水解反应的动力学和热力学特性进行了研究,并比较了不同催化剂对水解反应温度、能耗和变负荷响应时间的影响。结果表明:添加催化剂能够降低水解反应的活化能(液态磷酸氢二铵活化能为65.3 kJ/mol、固体氧化铝活化能为52.9 kJ/mol),并提高尿素转化率;添加催化剂能够提高水解反应速率,降低水解反应温度;在连续操作反应器中,固体氧化铝催化剂存在分布不均、接触不充分的问题,导致催化活性下降;催化水解的产氨能耗仅比普通水解降低约1%~3%,添加磷酸氢二铵和氧化铝催化剂未减小水解器的变负荷响应时间。

尿素水解  /  氨气  /  催化  /  动力学  /  活化能

In order to select high activity catalysts for urea hydrolysis, the kinetic and thermodynamic characteristics of urea catalytic hydrolysis reaction were studied by using batch reactor and continuous operation pilot plant, and the effects of different catalysts on hydrolysis reaction temperature, energy consumption and variable load response time were compared. The results show that, the activation energy of the hydrolysis reaction can be reduced by adding catalyst (the activation energy of the liquid diammonium hydrogen phosphate is 65.3 kJ/mol, and that of the solid alumina is 52.9 kJ/mol), and the urea conversion can be improved. The addition of catalyst increases the hydrolysis reaction rate and decreases the hydrolysis reaction temperature. Due to uneven distribution and insufficient contact, the catalytic activity of solid alumina catalyst decreases in the continuous operation reactor. The energy consumption of ammonia production by catalytic hydrolysis is about 1%~3% lower than that of ordinary hydrolysis, and the response time of hydrolyzer changing load is not shortened by adding diammonium phosphate and alumina catalyst.

urea hydrolysis  /  ammonia  /  catalytic  /  dynamics  /  activation energy
向小凤, 张向宇, 王志超, 张喜来, 张波, 姚伟. 尿素水解催化剂性能比较研究. 热力发电, 2023 , 52 (1) : 105 -110 . DOI: 10.19666/j.rlfd.202206136
Xiaofeng XIANG, Xiangyu ZHANG, Zhichao WANG, Xilai ZHANG, Bo ZHANG, Wei YAO. Comparative study on performance of catalysts for urea hydrolysis[J]. Thermal Power Generation, 2023 , 52 (1) : 105 -110 . DOI: 10.19666/j.rlfd.202206136
  • 国家重点研发计划资助项目(2020YFC1910000)
  • 中国华能集团有限公司总部科技项目(HNKJ21-H15)
2023年第52卷第1期
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doi: 10.19666/j.rlfd.202206136
  • 接收时间:2022-06-12
  • 首发时间:2026-01-23
  • 出版时间:2023-01-25
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  • 收稿日期:2022-06-12
基金
National Key Research and Development Program(2020YFC1910000)
国家重点研发计划资助项目(2020YFC1910000)
Science and Technology Project of China Huaneng Group Co., Ltd.(HNKJ21-H15)
中国华能集团有限公司总部科技项目(HNKJ21-H15)
作者信息
    西安热工研究院有限公司电站锅炉煤清洁燃烧国家工程研究中心,陕西 西安 710054
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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