Reactor performance reforming

The reformer reactor performance as an ammonia cracker was evaluated. The experiments were conducted using a reformer feed composed of 6 seem ammonia. The reactor was heated with the electric heaters to determine the heater power required to achieve high conversion. In these experiments, approximately 97% of the ammonia feed was converted to hydrogen at 900 °C (approximately 1.8 W) when operating at atmospheric pressure. - °... 

The next step in the processor development will be to integrate the palladium alloy membrane with the methanol steam reformer reactor. The researchers anticipate that the addition of the palladium membrane will improve the reactor performance due to in-situ hydrogen removal. 

Table 5. Methanol Steam Reforming Reactor Performance ...

Over 30 man-years of effort were involved in developing the model, which is named KINPTR, an acronym for kinetic platinum reforming model. Since its development, KINPTR has had a major impact in Mobil s worldwide operations. It can be accessed by personnel at each of Mobil s locations throughout the world. Input requirements are simple and convenient making it very user friendly. Only feed characteristics, product quality targets, process configuration information, and process conditions are required for input. Output is informative and detailed. Overall and detailed yields, feed and product properties, and reactor performance data are given in the output. 

Catalytic activity experiments were carried out in a dynamic fixed-bed reactor. Methane reforming with carbon dioxide was performed at 1 atm and 923-993 K. Reactor feed was O.S mol h-> with N2 H2 C02 CH4 ratios of 65 25 7 3 respectively. 

From the above discussion it can be concluded that the close approach to the maximum rate point on the rate dependence curve at the entrance of the reformer tube gives higher initial rate of reaction but at the same time gives faster approach to the positive order region where the order of reaction drops sharply. This means that there is always an optimum steam feed partial pressure that gives maximum reactor performance (expressed in terms of methane conversion) and this optimization problem is a result of the non-monotonic dependence of the rate of reaction upon steam partial pressure. 

Establish kinetic models for the primary catalyst candidates for each of the component reactors (steam reforming, water gas shift, and preferential oxidation). Update the reactor models for the component reactors and establish performance for the various reactor configurations. 

Reformer Modeling NETL is also developing a CFD model in Fluent to understand and address the heat and mass transfer issues and reactor performance for steady-state and transient analysis. 

Then they investigated the influence of system parameters on the CO2 membrane reactor performance [41]. They investigated WGS reaction with auto-thermal reforming and steam reforming feeds. The required membrane... 

De Falco M, Basile A, Gallucci F (2010) Solar membrane natural gas steam reforming process evaluation of reactor performance. Asia Pacific J Chem Eng Memb React 5 179-190... 

De Falco, M. (2008). Pd-based membrane steam reformers a simulation study of reactor performance. International Journal of Hydrogen Energy, 33, 3036—3040. 

Another problem with methane dry reforming is the formation of carbon on the surface of solid catalysts this implies a progressive reduction of the catalytic activity and a loss of reactor performance (Moulijn, Diepen, Kapteijn, 2001). The formation of solid carbon is mainly due to reactions 4.2—4.5. 

A number of papers have reported on reactor performance during reactor development for diesel reforming with a conversion of 90-99%. These results were caused by an improper functioning of reactors at a lower development level... 

Tsuru, T., Morita, T., Shintani, H., Yoshioka, T. and Asaeda, M. (2008) Membrane reactor performance of steam reforming of methane using hydrogen-permselective catalytic SiO membranes.of Membrane Science, 316, 53-62. 

More recently, Solsvik and Jakobsen [140] performed a numerical study comparing several closures for mass diffusion fluxes of multicomponent gas mixtures the Wilke, Maxwell-Stefan, dusty gas, and Wilke-Bosanquet models, on the level of the single catalyst pellet and the impacts of the mass diffusion flux closures employed for the pellet, on the reactor performance. For this investigation, the methanol synthesis operated in a fixed packed bed reactor was the chemical process adopted. In the mathematical modeling study of a novel combined catalyst/sorbent pellet. Rout et al. [121] investigated the performance of the sorption-enhanced steam methane reforming (SE-SMR) process at the level of a single pellet. Different closures... 

Based on the experimental data of the C02-selective facUitated transport membranes described earlier in this chapter, we proposed the concept of C02-selective WGS membrane reactor and developed a one-dimensional nonisothermal model to simulate the reaction and transport process (Huang et al., 2005a). The modeling results have shown that H2 enhancement and CO reduction to 10 ppm or lower are achievable for autothermal reforming synthesis gas via CO2 removal. With this model, we have elucidated the effects of system parameters on the membrane reactor performance. Using the membrane synthesized and the commercial WGS catalyst, we have obtained a CO concentration of less than 10 ppm in the H2 product in WGS membrane reactor experiments and verified the model developed (Huang et al., 2005b Zou et al., 2007). 

The first step is to Pull data from the simulation. When Aspen HYSYS pulls data, current operating conditions, feed stock information and process parameters enter the reforming environment. A Calibration refers to the set of the activity factors that produce a given product yield and reactor performance (which we provide to the calibration environment) based on the current model state. We pull data by click on the Pull Data from Simulation button (Figure 5.78). 

---