An experimental investigation of hydrogen-enriched air induction in a diesel engine system

A Taguchi-fuzzy based multi-objective optimization study on the soot-NOx-BTHE characteristics of an existing CI engine under dual fuel operation with hydrogen

“…1 15 Specific gravity 0.83 0.091 i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 3 9 ( 2 0 1 4 ) 2 0 2 7 6 e2 0 2 9 3 ratio limit of about 0.2 as compared to about 0.5 for most hydrocarbon fuels [28]. The importance of very lean equivalence ratios under which hydrogen sustains combustion can be appreciated in the context of the potential benefits of reduced pollutant emissions that are offered under such conditions considering the fact that the operation range of conventional DI diesel engines are mainly constrained by excessive smoke and hydrocarbon emissions at equivalence ratios higher than 0.7e0.9 [28]. Moreover, the high auto-ignition temperature of hydrogen encourages the use of higher compression ratios as prevalent in diesel engines.…”

A two-component CFD studies of the effects of H2, CNG, and diesel blend on combustion characteristics and emissions of a diesel engine

“…H30eN70, H50eN50 and H70eN30 were designed for the mixtures percent of hydrogen to CNG which are 30:70, 50:50 and 70:30%, respectively, and were used in the simulations. Because of knocking, the maximum quantity addition by hydrogen was limited to 50% [24,28]. Therefore, the quantity of diesel was 50% of the total fuel at diesel mode and the other 50% was substituted by the natural gas and hydrogen as shown in Table 4.…”

“…Natural gas enrichment has the ability to make the combustion of hydrogen stable and smoother which can prevent imperfect combustion. NO x emission is increased sharply along with adding hydrogen [23,24]. The main reason for this increment is the temperature.…”

Kinetic and dynamic analysis of hydrogen-enrichment mixtures in combustor systems – A review paper

“…The fundamental and practical aspects of the usage of hydrogen-hydrocarbon mixtures on both transportation and power generation (in terms of their mechanical and chemical properties) in different systems, such as engines [11][12][13][14][15][16][17][18][19][20][21][22][23][24], burners [25][26][27][28][29][30][31][32][33][34], combustion bombs [35][36][37][38][39][40][41], vessels [8,9,[42][43][44][45][46] and chambers [5,10,[47][48][49][50][51][52][53][54], have been broadly investigated. The parameters affecting hydrogen-hydrocarbon mixtures have been studied, including flame configurations, e.g., laminar premixed …”