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第二次全国固氮会议后,为了进一步解决固氮活性中心是什么,催化剂的活性和寿命以及催化剂机械强度等问题,我们探讨了温和条件下附载型铁系电子接受体催化剂Al_2O_3-乙炔黑-Fe-Na(或K)体系,在实验室工作取得了一定效果的基础上,去年我们考察了该催化剂体系在加压条件下的性能。因国内外对该体系催化剂在加压条件下活性变化规律报导不多,例如日本Ozaki只简单报道了钌-碱金属-活性炭体系在350℃,空速10,000小时~(-1),压力20—50公斤/厘米~2条件下出口氨浓度为2.35％。参加这项工作的师生又缺乏高压试验的经验,有不少人还是第一次接触高压系统。经过热烈讨论后,我们坚决走出校门,开门搞科研。破除迷信,解放思想,在南京化学工业公司工人师傅和科技人员的大力支持和协助下,在短短的两个月当中做了大量的实验工作,取得了一批重现性较好的数据,初步探明了在加压条件下活性变化规律,为今后进一步开展这方面的工作提供了宝贵经验。
After the Second National Nitrogen Fixation Conference, in order to further solve the problem of the active site of nitrogen fixation, the activity and life of the catalyst and the mechanical strength of the catalyst, we investigated the effect of the supported iron-based electron acceptor catalyst Al 2 O 3 -acetylene black -Fe- Na (or K) system, the laboratory work has achieved some results, based on last year we examined the catalyst system under pressure conditions. For example, Ozaki in Japan simply reports the ruthenium-alkali metal-activated carbon system at 350 ℃, the space velocity of 10,000 hours -1, the pressure of 20- Export ammonia concentration of 50 kg / cm ~ 2 under 2.35%. The teachers and students who participated in this work lacked the experience of high-pressure test. Many people were still exposed to the high-pressure system for the first time. After a lively discussion, we resolutely stepped out of school and opened the door to engage in scientific research. To break the superstition and emancipate the mind, with the great support and assistance from the workers and technicians of Nanjing Chemical Industry Corporation, a great deal of experimental work has been done in just two months and a batch of data with good reproducibility has been obtained. The law of activity change under pressure was preliminarily proved, which provided valuable experience for further carrying out this work in the future.