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Heterogeneously catalyzed steam reforming processes in chemical reactors employing microchannel process technology Junjie Chen Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com The oxidation of sodium sulfite solutions by dissolved oxygen is greatly accelerated by minute traces of copper ions in the homogeneous liquid system. This system is of special interest since it has been shown that the process is a chain reaction. In this case many thousands of molecules of sodium sulfite can be oxidized to sulfate if the initial activation process is produced by absorption of a limited number of quanta (discrete energy measures) of light. The best example of a light-initiated chain reaction is the photocombination of hydrogen and chlorine; as many as one million molecules of hydrogen chloride can be formed by absorption of a single light quantum. It is of interest to note that such chain reactions can be retarded by the presence of negative catalysts, more commonly termed inhibitors. These are materials that slow down the overall reaction by shortening the reaction chains, generally by entering into a non-chain reaction with one of the chemical components that maintain the chain. A wide variety of substances, including alcohols, sugars, and phenols, have been found to act as inhibitors of the oxidation of sulfite solutions. In certain instances, two or more catalysts present at the same time produce effects greater than either would produce alone. It is then customary to speak of promoter action. Thus, iron ions in solution fortify the action of copper ions in catalyzing a reaction between hydrogen peroxide and iodine. It is assumed that each catalyst activates only one of the reactants. Streamwise distance (meter), Heterogeneous reaction rate along the length of the reactor (mole per square meter per second) 0 4.44959 0.00025 4.45878 0.0005 4.48183 0.00075 4.51166 0.001 4.54417 0.00125 4.58104 0.0015 4.62817 0.00175 4.68814 0.002 4.75712 0.00225 4.82549 0.0025 4.88385 0.00275 4.92753 0.003 4.95729 0.00325 4.98021 0.0035 5.00483 0.00375 5.03541 0.004 5.07069 0.00425 5.10466 0.0045 5.13141 0.00475 5.14874 0.005 5.15804 0.00525 5.16465 0.0055 5.17504 0.00575 5.19208 0.006 5.21419 0.00625 5.23637 0.0065 5.25342 0.00675 5.26315 0.007 5.26706 0.00725 5.26999 0.0075 5.27698 0.00775 5.2902 0.008 5.30797 0.00825 5.32557 0.0085 5.33865 0.00875 5.34553 0.009 5.34758 0.00925 5.34898 0.0095 5.35409 0.00975 5.36492 0.01 5.38001 0.01025 5.39497 0.0105 5.40558 0.01075 5.41024 0.011 5.41031 0.01125 5.41008 0.0115 5.41383 0.01175 5.42315 0.012 5.43632 0.01225 5.44943 0.0125 5.45885 0.01275 5.46302 0.013 5.46291 0.01325 5.46232 0.0135 5.46534 0.01375 5.47361 0.014 5.48559 0.01425 5.49703 0.0145 5.50449 0.01475 5.50685 0.015 5.5052 0.01525 5.50292 0.0155 5.5039 0.01575 5.5099 0.016 5.51963 0.01625 5.52926 0.0165 5.53479 0.01675 5.53509 0.017 5.53187 0.01725 5.52862 0.0175 5.52867 0.01775 5.53341 0.018 5.54174 0.01825 5.54974 0.0185 5.5541 0.01875 5.5541 0.019 5.55067 0.01925 5.54664 0.0195 5.54565 0.01975 5.54956 0.02 5.55697 0.02025 5.56395 0.0205 5.56722 0.02075 5.56603 0.021 5.56165 0.02125 5.55689 0.0215 5.55505 0.02175 5.55776 0.022 5.56342 0.02225 5.56878 0.0225 5.57095 0.02275 5.56887 0.023 5.56341 0.02325 5.55734 0.0235 5.55408 0.02375 5.55524 0.024 5.55933 0.02425 5.56278 0.0245 5.56283 0.02475 5.55851 0.025 5.55036 0.02525 5.54139 0.0255 5.53503 0.02575 5.53218 0.026 5.53104 0.02625 5.52834 0.0265 5.52161 0.02675 5.51435 0.027 5.50735 0.02725 5.50059 0.0275 5.49358 0.02775 5.48678 0.028 5.47965 0.02825 5.47246 0.0285 5.46597 0.02875 5.45839 0.029 5.45181 0.02925 5.4442 0.0295 5.43768 0.02975 5.43001 0.03 5.42345 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

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