کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7715374 | 1497443 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effects of hydrogen on the efficiency of NOx reduction via hydrocarbon-selective catalytic reduction (HC-SCR) at low temperature using various reductants
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کلمات کلیدی
DOCC3H6PGMTWCHC-SCRDPFLNTUrea-SCRULSDTHCN2OGDISUS - ITSNOx - NOXHydrogen addition - افزودن هیدروژنNitrous oxide - اکسید نیتروژنnitrogen oxide - اکسید نیتروژنgasoline direct injection - تزریق مستقیم بنزینlean NOx trap - تله NOx تیرهDodecane - داودانLow temperature - دمای پایینCarbon dioxide - دیاکسید کربنThree-way catalyst - سه کاتالیزورPlatinum group metals - فلزات گروه پلاتینDiesel particulate filter - فیلتر ذرات دیزلیNitrogen dioxide - نیتروژن دیاکسیدNO2 - نیتروژن دیاکسیدNitric oxide - نیتریک اکسیدHeptane - هپتانPropene - پروپیلن، پروپینdiesel oxidation catalyst - کاتالیزور اکسیداسیون دیزلCO2 - کربن دیاکسیدTotal hydrocarbons - کل هیدروکربن ها
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We investigated the effects of adding hydrogen on the efficiency of NOx reduction via HC-SCR using various reductants. Tests were carried out using both laboratory experiments and an engine test-bench at temperatures below 315 °C, with a 2.5 wt.% high-dispersion Ag/Al2O3 catalyst. The hydrogen was introduced to maximize the efficiency of NOx reduction at low temperatures (245-315 °C). In the laboratory tests, propene, heptane, and dodecane were used as reductants to determine the effects of different chain lengths and chemical structures. The effects of hydrogen addition on the gas-phase reaction of HC-SCR were also examined. The efficiency of NOx reduction increased significantly following the addition of hydrogen. In particular, the effects of hydrogen addition were significantly influenced by characteristics of the fuel, including the chain length and the structure, and longer chains and a higher degree of saturation were found to be advantageous. Engine tests were carried out to verify the effects of longer hydrocarbons in the presence of hydrogen; we found a maximum NOx reduction efficiency of 79% at 315 °C and 74% at 245 °C using diesel fuel as a reductant.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 30, 10 August 2015, Pages 9602-9610
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 30, 10 August 2015, Pages 9602-9610
نویسندگان
Hyerim Gu, Kwang Min Chun, Soonho Song,