磁性铁矿石对CO还原SO_2的催化活性

采用磁性强弱不同的铁矿石以及制备的Fe3O4作为催化剂,催化CO还原SO2。实验结果表明:在3种催化剂中弱磁性铁矿石对CO还原SO2的催化活性最好;当反应温度为700℃时,在弱磁性铁矿石催化作用下的SO2转化率达84.3%。该方法既可以有效去除炼油厂催化裂化再生装置排放的SO2,同时又利用了低品位的磁性铁矿石,实现了SO2的治理和资源的综合利用。

N2O Decomposition over K-Ce Promoted Co-M-AI Mixed Oxide Catalysts Prepared from Hydrotalcite-like Precursors

A series of mixed oxide catalysts with different composition of Co-M-Al and Co-M-Ce- Al （M=Zn, Ni, Cu） were prepared by co-precipitation method from hydrotalcite-like compounds. The experimental results revealed the catalytic activity of Co-Ni-Al is slightly higher than that of Co-Zn-Al and much higher than that of Co-Cu-Al for direct decomposition of N2O. Moreover, addition of small amounts of Ce02 improved the catalytic activity signif- icantly and made the decomposition temperatures at which the N2O conversion was 50% and 90% （T50 and Tgo） both decreased 80 ℃ than those of Co-M-Al catalysts without CeO2 added. Further, potassium-load also promoted the catalytic activity, and the decomposi- tion temperatures of T50 and T90 both decreased approximately 50 ℃. It is significant for decomposing N2O from industries and reducing carbon emission from atmosphere.

如何看待高中语文教学实施生活化的教学手段

从当前的语文教学活动和过程来看，由于生活环境和教育方法等原因，高中生们的生活经历和情感经验往往都较为贫乏，这让他们对语文作品中的精神、情感、思想等内容并不能有十分深刻的理解，并影响到他们对语文课程的学习热情，更不利于他们将语文知识和高尚情操等运用于生活之中。本文主要对当前我国高中语文生活化教学的内涵和现状进行了分析，探讨了当前高．中语文教学如何更好地实现生活化。

论如何把生态文明教育融入中学语文教学中

在高中语文教学过程中渗透以物为友的思想、悲物悯人的意识、护物有责的意识、物我谐和的生态文明理想,让学生在传统文化中感受物我谐和的生态文明的理念,有助于学生树立尊重自然、敬畏生命的理想,进一步推动生态文明教育.尤其是古诗文中浓郁的自然生态意识,对当下大力倡导保护自然环境、构建和谐社会、促进人类进步,具有不可忽视的现代意义与启迪作用.

不同粒径活性氧化铝负载CeO_2-Fe_2O_3催化还原脱硫脱硝

运用工业级活性氧化铝作载体,开展CeO2掺杂对不同粒径活性氧化铝负载Fe2O3催化还原烟气脱硫脱硝实验研究。并采用BET和XRD分别对氧化铝载体和催化剂进行表征。实验结果表明:比表面积和孔容相近的不同粒径活性氧化铝载体负载活性组分后,催化还原同时脱硫脱硝的活性表现出粒径较大的铝基催化剂,比粒径较小的铝基催化剂脱硫效果好;不同组分CeO2掺杂10%Fe2O3/Al2O3催化剂中,3mm粒径6%CeO2-10%Fe2O3/Al2O3催化剂脱硫效果最好;将此种催化剂用于模拟烟气(SO2+NO+CO+N2)脱硫脱硝研究,获得较宽的脱硫脱硝温度范围(300~550℃),且NO和SO2转化率均大于92.5%。