Emissions of intermediate volatility organic compound from waste cooking oil biodiesel and marine gas oil on a ship auxiliary engine

Ship auxiliary engines contribute large amounts of air pollutants when at berth.Biodiesel,including that from waste cooking oil(WCO),can favor a reduction in the emission of primary pollutant when used with internal combustion engines.This study investigated the emissions of gaseous intermediate-volatile organic compounds(IVOCs)between WCO biodiesel and marine gas oil(MGO)to further understand the differences in secondary organic aerosol(SOA)production of exhausts.Results revealed that WCO exhaust exhibited similar IVOC composition and volatility distribution to MGO exhaust,despite the differences between fuel contents.While WCO biodiesel could reduce IVOC emissions by 50%as compared to MGO,and thus reduced the SOA production from IVOCs.The compositions and volatility distributions of exhaust IVOCs varied to those of their fuels,implying that fuel-component-based SOA predicting model should be used with more cautions when assessing SOA production of WCO and MGO exhausts.WCO biodiesel is a cleaner fuel comparing to conventional MGO on ship auxiliary engines with regard to the reductions in gaseous IVOC emissions and corresponding SOA productions.Although the tests were conducted on test bench,the results could be considered as representative due to the widely applications of the test engine and MGO fuel on real-world ships.

废机油净化甲苯废气的工艺研究

在填料吸收塔中,应用废机油为吸收剂对含甲苯废气进行了实验研究。系统地考察了填料层高度、进口甲苯浓度、空塔气速、液气比等因素对吸收效率的影响,确定了最佳工艺条件。实验结果表明,废机油能有效净化废气中的甲苯,去除率达到95%～98%。吸收尾液蒸馏能回收甲苯和废机油。

废机油处理甲苯废气的可行性研究

甲苯废气毒性大,破坏环境,影响健康。废机油吸收甲苯废气与传统的吸收法相比,具有去除效率高、操作简单、以废治废等优势。文章将从其原理、效果和影响因素等方面对其可行性进行分析。