DOI: 10.5281/zenodo.7255078
title: Combined heat exchanger reactors for conducting simultaneous endothermic and exothermic reactions

description: <strong>Combined heat exchanger reactors for conducting simultaneous endothermic and exothermic reactions</strong> 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 It has been described a process to generate a hydrogen rich gas by generating a catalytic film which is composed of layers of different catalysts. It is proposed that steam reforming of a hydrocarbon be performed by one layer and the energy for this process be supplied by a hydrocarbon oxidative process being promoted in the subsequent layer. Various hybrids of this theme are proposed. However, as the heat is supplied by an autothermal reaction, oxygen must be supplied along with the fuel stream. As well as the oxygen, associated nitrogen is present. This nitrogen acts to absorb process energy which lowers the thermal efficiency of the process as well as diluting the desired product, hydrogen. The presence of the nitrogen increases the load on downstream partial oxidation units which act to oxidize carbon monoxide to carbon dioxide. The nitrogen also reduces the streams suitability for use in fuel cells. Therefore, a reactor which can supply sufficient energy to an endothermic reaction without mixing the streams is needed. It has been described a method where parallel and discrete channels can be formed by stacking suitable plates to form a structure. The plates are then bonded together using brazing, welding or diffusion bonding techniques. It is also claimed that cast ceramic plates can be used with a suitable sealing mechanism. Catalyst can be adhered onto the wall and energy supplied or removed via conduction between subsequent channels. However, the design does not allow for catalyst replenishment nor precious metal recovery. Therefore, a reactor which affords an easy and cheap method for catalyst replacement and replenishment is required. Streamwise distance (meters), Heat flux (watts per square meter) 0 28543.2 0.00025 147840 0.0005 130560 0.00075 136832 0.001 76061.5 0.00125 4012.44 0.0015 6787.19 0.00175 9091.13 0.002 70670.9 0.00225 107776 0.0025 78720 0.00275 75904 0.003 39811.2 0.00325 1654.75 0.0035 2917.25 0.00375 4164.75 0.004 50131 0.00425 77568 0.0045 55552 0.00475 53248 0.005 27844.7 0.00525 1018.19 0.0055 1766.44 0.00575 2553.25 0.006 36808.2 0.00625 58240 0.0065 43264 0.00675 43136 0.007 23029 0.00725 728.5 0.0075 1212.56 0.00775 1734.25 0.008 27885.2 0.00825 45056 0.0085 34944 0.00875 37120 0.009 20554 0.00925 566.687 0.0095 893.187 0.00975 1261.12 0.01 22236.7 0.01025 36992 0.0105 30464 0.01075 33920 0.011 19118 0.01125 463.125 0.0115 683.938 0.01175 966.625 0.012 18747.8 0.01225 31872 0.0125 27136 0.01275 31232 0.013 17946 0.01325 392.437 0.0135 547.312 0.01375 772.062 0.014 16463.2 0.01425 28544 0.0145 25088 0.01475 29568 0.015 17164.1 0.01525 343.563 0.0155 452.563 0.01575 637.126 0.016 14980 0.01625 26240 0.0165 23296 0.01675 27776 0.017 16257.6 0.01725 307.437 0.0175 385.437 0.01775 541.563 0.018 13518 0.01825 24064 0.0185 21888 0.01875 26240 0.019 15353.1 0.01925 280.813 0.0195 340.375 0.01975 476.688 0.02 12456 0.02025 22144 0.0205 20352 0.02075 24832 0.021 14579.9 0.02125 263.812 0.0215 312.5 0.02175 433.625 0.022 11277.1 0.02225 &nbsp
description: 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