A Multi-Function, Heated Mixer for Rapid Heat-up, Low-Temperature Ammonia Demand, Deposit Prevention and to Meet Ultra-Low NOx Regulations

氮氧化物 冷启动(汽车) 化学 选择性催化还原 环境科学 催化作用 汽车工程 工程类 生物化学 燃烧 有机化学
作者
Mansour Masoudi,Nick Poliakov,Sahm Noorfeshan
出处
期刊:SAE technical paper series
标识
DOI:10.4271/2023-01-0356
摘要

<div class="section abstract"><div class="htmlview paragraph">Selective Catalytic Reduction (SCR) operation depends strongly on both heat and ammonia availability (stored or incoming). These requirements make high efficiency SCR challenging in lower temperature cycles where SCR is relatively cold, and Diesel Exhaust Fluid (DEF) injection is largely absent due to deposit risks. Examples include low temperature cycles such as low-idling, stop-and-go or low-load cycles such as city driving or local delivery cycles.</div><div class="htmlview paragraph">An Electrically Heated Mixer/ EHM™ is utilized to address these challenges in a single component. EHM simultaneously provides heat for rapid SCR heat-up during the cold phase or in other low-temperature operations, steady or transient. Second, its heating mechanism makes deposit risks nearly non-existent. Third, EHM enables DEF injection at 130 °C, markedly enhancing the low temperature SCR impact. It is shown that these capabilities collectively make EHM a promising pathway for meeting ultra-stringent NOx targets including California 2027 (0.02 gr/hp.hr). Via rapidly heating the SCR catalyst during cold-start, EHM enables substantially lowering the cold-phase NOx. For instance, it is shown this lowers the cold FTP and cold WHTC NOx emission by 2 – 2.5 fold and in Low-Load Cycle by 22-fold.</div><div class="htmlview paragraph">EHM also allows DEF injection in low exhaust temperatures such as in 70 - 80 °C, for instance for rapidly filling the SCR catalyst with ammonia, if needed.</div><div class="htmlview paragraph">Unlike adding other exhaust flow heating devices where an additional component is ultimately integrated in the aftertreatment architecture, EHM is a mixer, already present in emission control systems. These flexibilities, along with its lower cost and ease in fitting, make EHM an enabling pathway for Diesel emission control systems meeting very low NOx regulations.</div></div>
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
wanci应助丰富赛凤采纳,获得10
刚刚
刚刚
1秒前
852应助suiwuya采纳,获得10
1秒前
qwe1108发布了新的文献求助10
1秒前
许文帝发布了新的文献求助10
2秒前
鱼小鹅关注了科研通微信公众号
2秒前
3秒前
3秒前
3秒前
4秒前
调研昵称发布了新的文献求助10
4秒前
yoyo发布了新的文献求助10
4秒前
白华苍松发布了新的文献求助10
4秒前
哇哇哇发布了新的文献求助10
4秒前
TANG完成签到,获得积分10
5秒前
5秒前
倦鸟有言发布了新的文献求助10
5秒前
RUN发布了新的文献求助10
6秒前
豆子完成签到,获得积分10
7秒前
qwe1108完成签到,获得积分10
7秒前
7秒前
cheche发布了新的文献求助30
7秒前
8秒前
engel58完成签到,获得积分10
8秒前
cgshao完成签到,获得积分10
8秒前
脑洞疼应助LILI李采纳,获得10
8秒前
9秒前
隐形曼青应助健忘的冰薇采纳,获得30
9秒前
ouwen发布了新的文献求助10
10秒前
hopy发布了新的文献求助10
10秒前
芙蓉完成签到,获得积分10
10秒前
芙蓉发布了新的文献求助30
13秒前
13秒前
xzh发布了新的文献求助10
13秒前
2222222完成签到,获得积分10
13秒前
13秒前
14秒前
14秒前
wuyu完成签到,获得积分20
15秒前
高分求助中
Evolution 10000
Sustainability in Tides Chemistry 2800
The Young builders of New china : the visit of the delegation of the WFDY to the Chinese People's Republic 1000
юрские динозавры восточного забайкалья 800
A new approach of magnetic circular dichroism to the electronic state analysis of intact photosynthetic pigments 500
Diagnostic immunohistochemistry : theranostic and genomic applications 6th Edition 500
Chen Hansheng: China’s Last Romantic Revolutionary 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3148993
求助须知:如何正确求助?哪些是违规求助? 2800076
关于积分的说明 7838336
捐赠科研通 2457543
什么是DOI,文献DOI怎么找? 1307913
科研通“疑难数据库(出版商)”最低求助积分说明 628328
版权声明 601685