How Did the Response Surface Methodology Optimized Reaction Conditions Influence and Enhance the Catalytic Performance of Nanoprous Chitosan Immobilized Cobalt Porphyrinate

Abstract

How was the catalytic performance of the title catalyst influenced and enhanced by the Response Surface Methodology optimized-reaction conditions? Based on our experimental data, the effects of the Response Surface Methodology optimized reaction conditions on the catalytic performance were investigated in this paper. The experimental results show that, the micro alterations of various reaction parameter values resulted in the micro changes of cyclohexane conversion, further causing the positive and negative effects, and resulting in the synergy or the antagonism to cyclohexane conversion. The statistic study via Response Surface Methodology showed that, (1) the size order of the effects of the parameters on cyclohexane conversion was that, the quadratic terms > the mutual interaction terms ≈ the single variable terms; (2) compared to Traditional Optimization Method, Response Surface Methodology could more quickly offer the precise optimum values of reaction conditions. In the five recycle applications of the title catalyst, on average, the catalytic activity and the catalytic efficiency were respectively increased 50% and 25% than those obtained from the Traditional Optimization Method-optimized reaction conditions; (3) compared to the other similar catalysts reported in literatures, the present catalyst was a biomimetic catalyst with the highest Turnover Frequency value (6.5 × 10 5 h −1).

Full use of factors promoting catalytic performance of chitosan supported manganese porphyrin

“…To have a more intuitive understanding the acting effects of interaction parameters on TON, the 2 plots in Fig. 5 A,B were plotted respectively by maintaining at the zero levels (0.6 MPa and 0.50 mg, respectively) 49 . Then, some standards in Table 4 offered by BBD are used to illustrate the meaning of those data values in Table 4 , including whether or not those parameter terms being significant to the model (Eq.…”

“…Reviewing and comparing the previous researches on hydrocarbon oxidation, although there were a lot of the influencing factors on the performances of catalysts and the interactions of the factors were complex 49 , it is worthy to use RSM optimizing the reaction conditions of ethyl benzene oxidation catalyzed by Mn TPFPP/mCS catalyst, including the our previous research works 34 , 35 , 53 , 54 , and maybe even some of other research works 1 – 25 . Because the method could tune the external factors (oxidation reaction conditions) to the optimal degree, probably letting the catalysts to make full use of the optimal external reaction conditions 55 .…”

“…(4). Because the regression coefficients were obtained from the viewpoint of mathematical statistics 49 . For the regression coefficient of X 3 term, at its zero level (175 °C and 0.60 MPa), TON first increased and then decreased with increasing Mn TPFPP amount from 0.25 to 0.75 mg.…”

Optimization of Ti–BA efficiently for the catalytic alcoholysis of waste PET using response surface methodology

“…In addition, this method can effectively estimate the factors of the quadratic model and avoid combination processing within the extreme range. 32–35…”

“…In addition, this method can effectively estimate the factors of the quadratic model and avoid combination processing within the extreme range. [32][33][34][35] To nd a catalyst with better comprehensive cost performance, in this study, we introduce a homemade Ti-BA catalyst for EG depolymerization of waste PET bottles at atmospheric pressure to obtain BHET, this has not been reported in the current catalytic degradation reaction system, compared with other catalysts for degrading PET, Ti-BA catalyst with titanium as the active center, harmless to organisms, and has no heavy metal effect, is the best choice as the metal activity center in the catalyst. The Ti-BA catalyst prepared in this study has high catalytic activity, low input cost, and is not easy to hydrolyze, which is suitable for catalyzing polyester depolymerization.…”