摩托车污染控制催化转化器的试验研究

本文介绍了摩托车排气净化催化转化器的研究情况 ,包括催化剂的研制及转化器的结构设计 ,经过实验室模拟尾气活性评价、转鼓台架检测、实车试验 ,证明所研制的催化转化器具有较好的催化活性和实用性。同时讨论了催化转化器与二冲程、四冲程摩托车匹配的问题。     

保护层分析（LOPA）在炼化生产中的应用

介绍了目前国际通行的可以有效评估过程危险的保护层分析方法，结合其在炼化生产中某装置的具体运用．来说明保护层分析方法的作用.     

Effects of acidifying reagents on microwave treatment of dairy manure

Dairy manure, acidified using organic acids (acetic, oxalic, and citric acid) were treated with microwave enhanced advanced oxidation process (MW/H₂O₂-AOP). The effect of a mixture of oxalic acid and commonly used mineral acids (sulfuric and hydrochloric acid) on MW/H₂O₂-AOP was also examined. Substantial amounts of phosphorus were released under MW/H₂O₂-AOP, regardless of organic acid or mineral acid used. All three organic acids were good acidifying reagents; however, only oxalic acid could remove free calcium ion in the solution, and improve settleability of dairy manure. The MW/H₂O₂-AOP and calcium removal process could be combined into a single-stage process, which could release phosphate, solubilize solids and remove calcium from dairy manure at the same time. A mixture of oxalic acid and mineral acid produced the maximum volume of clear supernatant and had an ideal molar ratio of calcium to magnesium for effective struvite (magnesium ammonium phosphate) crystallization process. A single-stage MW/H₂O₂-AOP would simplify the process and reduce mineral acid consumption compared to a two-stage operation. The results of a pilot scale study demonstrate that MW/H₂O₂-AOP is effective in treating manure and recovering resource from dairy farms.