Highly pure crystalline MCM 22 was synthesized under the conditions of a high temperature, low content of Na and water in a short time without addition of the crystal seeds of MCM 22. MoO 3 supported by H MCM 22 as th...Highly pure crystalline MCM 22 was synthesized under the conditions of a high temperature, low content of Na and water in a short time without addition of the crystal seeds of MCM 22. MoO 3 supported by H MCM 22 as the catalyst of the reactions of non oxidative aromatization of methane is investigated and it is evident that MCM 22 is a promising catalyst support for the studied methane aromatization reaction.展开更多
MoO3/MCM-49 has been synthesized under the special condition and it shows a high activity and selectivity for nonoxidative aromatization of methane with a long lifetime and extreme capacity of anti-coking. MoO3/MCM-49...MoO3/MCM-49 has been synthesized under the special condition and it shows a high activity and selectivity for nonoxidative aromatization of methane with a long lifetime and extreme capacity of anti-coking. MoO3/MCM-49 is considered as a very promising catalyst for the title reaction.展开更多
用Ni改性6Mo-0.7Co/HZSM-5催化剂,考察了温度,空速,Ni添加量对甲烷无氧芳构化反应的影响。结果发现,Ni改性提高了催化剂的活性、稳定性和苯收率,在反应温度700℃、空速5000 m L/(g·h)时负载质量分数为0.1%的Ni的催化剂有最佳性能...用Ni改性6Mo-0.7Co/HZSM-5催化剂,考察了温度,空速,Ni添加量对甲烷无氧芳构化反应的影响。结果发现,Ni改性提高了催化剂的活性、稳定性和苯收率,在反应温度700℃、空速5000 m L/(g·h)时负载质量分数为0.1%的Ni的催化剂有最佳性能。对制得的催化剂进行了NH_3-TPD、SEM、TEM、O_2-TPO、BET等表征分析。由NH_3-TPD结果可知,添加Ni后中强酸的量和浓度增大,强酸比例适中。SEM图可知Ni的添加使分子筛表面有絮状物质存在。由O_2-TPO与TEM结果,发现Ni的加入有效抑制了积炭的生成,提高了催化剂的活性与稳定性。展开更多
文摘Highly pure crystalline MCM 22 was synthesized under the conditions of a high temperature, low content of Na and water in a short time without addition of the crystal seeds of MCM 22. MoO 3 supported by H MCM 22 as the catalyst of the reactions of non oxidative aromatization of methane is investigated and it is evident that MCM 22 is a promising catalyst support for the studied methane aromatization reaction.
文摘MoO3/MCM-49 has been synthesized under the special condition and it shows a high activity and selectivity for nonoxidative aromatization of methane with a long lifetime and extreme capacity of anti-coking. MoO3/MCM-49 is considered as a very promising catalyst for the title reaction.
文摘用Ni改性6Mo-0.7Co/HZSM-5催化剂,考察了温度,空速,Ni添加量对甲烷无氧芳构化反应的影响。结果发现,Ni改性提高了催化剂的活性、稳定性和苯收率,在反应温度700℃、空速5000 m L/(g·h)时负载质量分数为0.1%的Ni的催化剂有最佳性能。对制得的催化剂进行了NH_3-TPD、SEM、TEM、O_2-TPO、BET等表征分析。由NH_3-TPD结果可知,添加Ni后中强酸的量和浓度增大,强酸比例适中。SEM图可知Ni的添加使分子筛表面有絮状物质存在。由O_2-TPO与TEM结果,发现Ni的加入有效抑制了积炭的生成,提高了催化剂的活性与稳定性。
