合成氯甲烷催化剂的失活.pdf

化工进展
02
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2011年第30卷增刊
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研究开发
合成氯甲烷催化剂的失活
闫晳,熊春燕,马瑞平,刘玉敏
(河北科技大学化学与制药工程学院,河北石家庄050018)
摘要:将制备组倪选出的两种化荆HZSM5和HY进行活性和寿命测试实验,当催化判在一次活性实验中
暂时失活后,対其进行再生,然后再做活性实验,直至其永久失活。将使用前的化剂和失活后的化剂进行
表征和比表面-孔结构分析,对比发現,催化剂使用前后活性组分并未流失,而孔结构发生了较大的变化,说明
对惟化剂进行的活性实验或者再生的条件是导致其孔結构陷而失活的原因。在对催化剂进行过水热实验后证
明催化剂孔结构的陷是由于再生条件所致。通过不断地对反应条件和再生条件进行探索和改进,同时重点分
析和研究催化剂失活原因,结果表明,HZSM-5和HY两种催化剂在本小试实验中衰现出較长的寿命
关键词:氟甲烷;催化剂;失活;再生
Study on the deactivation of catalysts for methyl chloride synthesis
YAN Xi, XIONG Chunyan, MA Ruiping, LIU Yumin
( College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology,
Shijiazhuang 050018, Hebei, China)
Abstract: The two kinds of catalysts are prepared by the group of preparation. The one is HZSM
5, the other is HY. They are used to finish our experiment of activity and life span. After the
temporary deactivation of the catalyst during the experiment, it can be regenerated. Then the
experiment of activity goes on until it lose the activity. After analysing the catalyst which is
unused and the catalyst which is in deactivation, then comparing with each other. it can be found
that the active constituent of the catalyst does not loss but the pore structure is different from
before. This indicates that the condition of active experiment and regeneration cause the collapse
of the pore structure so the catalyst deactivation. After the hot water experiment, it can b
concluded that the collapse of the pore structure is caused by the condition of regeneration. In this
work, the condition of experiment and regeneration is constantly improved. At the same time, the
reason of deactivation is analyzed and studied. The result of experiment indicates that the two
kinds of catalysts, HZSM-5 and HY, have long life span in this small scale experiment
Key words: methyl chloride; catalyst; deactivation; regeneration
联碱过程副产大量氯化铵,处理不当会污染环氯化铵的产量和消费量是相当大的,因此,研究氯
境。如氯化铵是生理酸性肥料,施用后因作物对化铵的转化,探索其下游产品,将低附加值的氯化
NH'离子吸收,氯离子残留土壤,与土壤钙结铵转化为氨气和氯化氢或氯气实现氯化铵的资源
合,形成溶解度较大的氯化钙,易被雨水戦者灌溉化,便可以解决联碱过程副产大量氯化铵的
水排走。在旱地里,若施用过量,会对作物和土壤问题。
造成一定的影响,如作物烧叶、土壤板结和盐化
等,这些弊端都严重限制了氯化铵的农用市场空
间,从而制约了联碱系统产能的发展。而且在我国第ー作者:く198ー):、男?士时究生?研究方向为化反
应过程与工艺。E-mailyanxi15931151262126.com。