Design considerations for a microchannel reactor with enhanced mass transfer
<p><strong>Design considerations for a microchannel reactor with enhanced mass transfer</strong></p>
<p>Junjie Chen</p>
<p>Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p>
<p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com</p>
<p> </p>
<p>The yield in each step must be considered. A step in a synthesis may give a very low yield of the desired product. For example, a proportion of the reactant may be converted into a different product by an alternative process that competes with the desired one; some of the product may undergo a subsequent reaction; or some of the product may be lost in the separation processes required for its isolation in a pure state. The yield is usually defined, on a percentage basis, as the number of molecules of product obtained when 100 could in principle have been formed. A yield of about 80 percent or more is generally considered good, but some transformations can prove so difficult to achieve that even a yield of 10 or 20 percent may have to be accepted. The ultimate synthetic goal in a perfect synthesis is to achieve 100 percent atom efficiency, in which all atoms of all reagents are incorporated into the synthesized product without the formation of any by-products. Naturally, the yield of a process affects the cost of the product, because the shortfall from a 100 percent yield represents wasted material. In addition, yield can be of the utmost importance in determining whether a synthesis is a practicable possibility, because the overall yield of a synthesis is the product of the yields of the individual steps. If these intermediate yields are mostly low, the ultimate product may not be obtainable in the necessary amount from the available starting material.</p>
<p>Streamwise distance (millimeters), Oxidation channel centerline temperature (degrees kelvin)</p>
<p>0 376.832</p>
<p>0.00025 392.68</p>
<p>0.0005 412.751</p>
<p>0.00075 434.524</p>
<p>0.001 453.097</p>
<p>0.00125 466.556</p>
<p>0.0015 475.414</p>
<p>0.00175 481.204</p>
<p>0.002 485.533</p>
<p>0.00225 489.367</p>
<p>0.0025 492.682</p>
<p>0.00275 495.234</p>
<p>0.003 496.977</p>
<p>0.00325 498.017</p>
<p>0.0035 498.539</p>
<p>0.00375 498.727</p>
<p>0.004 498.756</p>
<p>0.00425 498.74</p>
<p>0.0045 498.705</p>
<p>0.00475 498.653</p>
<p>0.005 498.578</p>
<p>0.00525 498.472</p>
<p>0.0055 498.338</p>
<p>0.00575 498.177</p>
<p>0.006 497.994</p>
<p>0.00625 497.814</p>
<p>0.0065 497.656</p>
<p>0.00675 497.522</p>
<p>0.007 497.408</p>
<p>0.00725 497.306</p>
<p>0.0075 497.202</p>
<p>0.00775 497.09</p>
<p>0.008 496.981</p>
<p>0.00825 496.893</p>
<p>0.0085 496.829</p>
<p>0.00875 496.779</p>
<p>0.009 496.736</p>
<p>0.00925 496.693</p>
<p>0.0095 496.644</p>
<p>0.00975 496.588</p>
<p>0.01 496.547</p>
<p>0.01025 496.536</p>
<p>0.0105 496.546</p>
<p>0.01075 496.564</p>
<p>0.011 496.578</p>
<p>0.01125 496.579</p>
<p>0.0115 496.566</p>
<p>0.01175 496.551</p>
<p>0.012 496.554</p>
<p>0.01225 496.589</p>
<p>0.0125 496.646</p>
<p>0.01275 496.706</p>
<p>0.013 496.754</p>
<p>0.01325 496.783</p>
<p>0.0135 496.794</p>
<p>0.01375 496.801</p>
<p>0.014 496.828</p>
<p>0.01425 496.889</p>
<p>0.0145 496.974</p>
<p>0.01475 497.058</p>
<p>0.015 497.125</p>
<p>0.01525 497.169</p>
<p>0.0155 497.194</p>
<p>0.01575 497.214</p>
<p>0.016 497.255</p>
<p>0.01625 497.333</p>
<p>0.0165 497.433</p>
<p>0.01675 497.53</p>
<p>0.017 497.608</p>
<p>0.01725 497.661</p>
<p>0.0175 497.694</p>
<p>0.01775 497.724</p>
<p>0.018 497.775</p>
<p>0.01825 497.865</p>
<p>0.0185 497.976</p>
<p>0.01875 498.083</p>
<p>0.019 498.168</p>
<p>0.01925 498.227</p>
<p>0.0195 498.268</p>
<p>0.01975 498.303</p>
<p>0.02 498.361</p>
<p>0.02025 498.457</p>
<p>0.0205 498.573</p>
<p>0.02075 498.683</p>
<p>0.021 498.772</p>
<p>0.02125 498.835</p>
<p>0.0215 498.878</p>
<p>0.02175 498.918</p>
<p>0.022 498.979</p>
<p>0.02225 499.076</p>
<p>0.0225 499.193</p>
<p>0.02275 499.303</p>
<p>0.023 499.392</p>
<p>0.02325 499.455</p>
<p>0.0235 499.5</p>
<p>0.02375 499.54</p>
<p>0.024 499.599</p>
<p>0.02425 499.692</p>
<p>0.0245 499.801</p>
<p>0.02475 499.903</p>
<p>0.025 499.985</p>
<p>0.02525 500.043</p>
<p>0.0255 500.083</p>
<p>0.02575 500.119</p>
<p>0.026 500.169</p>
<p>0.02625 500.246</p>
<p>0.0265 500.336</p>
<p>0.02675 500.42</p>
<p>0.027 500.487</p>
<p>0.02725 500.533</p>
<p>0.0275 500.563</p>
<p>0.02775 500.588</p>
<p>0.028 500.621</p>
<p>0.02825 500.672</p>
<p>0.0285 500.732</p>
<p>0.02875 500.787</p>
<p>0.029 500.829</p>
<p>0.02925 500.855</p>
<p>0.0295 500.867</p>
<p>0.02975 500.868</p>
<p>0.03 500.866</p>
<p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p>
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