Showing papers by "Adam Harvey published in 2011"
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TL;DR: In this paper, a variety of parameters, including seeds size, agitation speed, reaction temperature, reaction time, catalyst concentration and molar ratio of alcohol compare to the oil, were studied in the ranges of
83 citations
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TL;DR: In this paper, the mesoscale oscillatory baffled reactors were used for base-catalysed biodiesel production at very low flow rates, less than 2ml/min, which would be in the laminar flow regime in non oscillatory, steady state.
59 citations
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TL;DR: In this article, sulfated zirconia was used as the heterogeneous catalyst for esterification of myristic acid with methanol in presence of triglycerides, and the experimental data was interpreted with a second order pseudo-homogeneous kinetic model.
58 citations
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TL;DR: In this paper, two mesoscale oscillatory baffles with their volumes of 5.2 and 4.4 were experimentally characterised at net flow rates as low as 0.3 and gave a residence time of around 15-17min over a wide range of oscillation conditions.
Abstract: For the first time two mesoscale oscillatory baffled designs (central and integral baffles with their volumes of 5.2 ml and 4.4 ml, respectively) were experimentally characterised at net flow rates as low as 0.3 ml/min (Ren ∼ 1.25), giving a residence time of around 15–17 min over a wide range of oscillation conditions. The purpose was to identify the lower limits of operability, thereby determining the maximum residence time per unit reactor volume for these mesoscale units. The characteristics of fluid flow were found to be strongly affected by Strouhal number at these low net flows. For the integral baffles, the oscillation conditions exhibited little influence on the fluid mixing. For the central baffles, there were three distinct flow regimes, depending on Strouhal numbers which affect the fluid characteristics differently. At two regimes of Sts, St ≥ 0.8 and 0.13 ≤ St ≤ 0.2, an increase in frequency did not alter the axial dispersion. At St ≥ 0.8, the fluid experienced less uniform mixing, representing by right-skewed residence time distribution (RTD) curves. At 0.20 ≤ St ≤ 0.13, the fluid mixing was significantly improved, indicated by narrow and symmetrical RTD curves with Reo up to 700. At 0.4 ≤ St ≤ 0.27 and St ≤ 0.1, the degree of plug flow was a function of Reo. The maximum number of tanks achieved at these low flow rates was in the range 30–35, occurring at a velocity ratio (Reo/Ren) of 39–40.
47 citations
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TL;DR: In this article, the effect of geometrical parameters, including helical pitch and wire diameter, on the fluid mixing inside a mesoscale helical baffled design of an oscillatory baffled reactor (OBR) was for the first time experimentally investigated at a net flow rate of 172ml/min.
42 citations
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TL;DR: Not only were conversions greater for directly synthesised sulphated zirconia (63% vs. 42% after 4h), but it exhibited significantly greater yield for fatty acid methyl esters.
23 citations
01 Jan 2011
1 citations