Comparative Study of SO2 and SO2/SO3 Poisoning and Regeneration of Cu/BEA and Cu/SSZ-13 for NH3 SCR

Two copper-exchanged zeolites, Cu/SSZ-13 and Cu/BEA, were studied as catalysts for the selective reduction of NOx by NH3 (NH3-SCR). Their activities for standard SCR (NOx = NO) and fast SCR (NOx = 50% NO + 50% NO2) were measured before and after sulfur poisoning at 250 °C. The effect of 30 ppm SO2 and a mixture of 24 ppm SO3 + 6 ppm SO2 was evaluated. The repetition of subsequent activity measurements served as regeneration method in SCR conditions. SO2 deactivated Cu/SSZ-13 whereas Cu/BEA was only moderately affected. SO3 led to stronger deactivation of both catalysts than SO2. However, also for this case, the Cu/BEA was significantly less affected than Cu/SSZ-13, even though Cu/BEA contained larger amount of stored sulfur. One possible reason for this could be the large pores of Cu/BEA, where the sulfur species possibly resulted in less sterical hindrance than in the small pore SSZ-13 structure. NH3 temperature-programmed desorption (NH3-TPD) showed no loss of storage sites upon sulfur treatment and subsequent regeneration. Partial activity recovery was observed after a period in SCR conditions at 400 °C and 500 °C. Temperature at 300 °C was insufficient to regenerate the catalysts. Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) of NO adsorption suggested that SO2 interacts with the ZCuOH sites on Cu/SSZ-13, causing the strong poisoning.

REFORMULATION OF MEDIATION IN DISPUTE SETTLEMENT ON ISLAMIC BANKING

Purpose of the study: The general objective of this study was to explore the potential of the mediation process as a reformulation of Islamic banking dispute settlement after the Supreme Court Regulation (SCR) on mediation procedure in the court. On the one hand, this study tries to find a repositioning of mediation procedures in resolving disputes over Islamic Banking in religious courts. Methodology: This research was normative and empirical. The data collection techniques of this literature would be done utilizing literature study and field research. Primary data was obtained through field research with interviews. The participants from Judges of Religious Court, Abdul Manan as a Judge of in the Supreme Court Institution, Islamic banking legal unit. Data were processed by a qualitative descriptive analysis technique. Secondary data used consisted of primary legal material sourced from SCR No. 1 of 2016 and the contract. Principal Findings: The mediation process as a reformulation of Islamic banking dispute settlement especially in the Religious Court is according to Article 2 Paragraph (1) SCR No. 1 of 2016. The repositioning of mediation procedures in resolving Islamic banking disputes in the Religious Courts applied by making changes as part of the case registration process implemented through honesty, fidelity, and justice. Applications of this study: This paper is essential for the parties to get the legal certainty in maintaining the continuing development of Islamic banking business, product development, risk management and efficiency of the bank. The study may be instrumental in helping to improve the development of the legal studies programs, notably the Islamic Economic Law. The results of this study will provide benefits for the religious court to improve its performance effectively and efficiently in dispute settlement through mediation. Novelty/Originality of this study: Determination of the mediation as reformulation of dispute settlement on Islamic banking post-enactment or issuance of the SCR No. 1 of 2016 and to find out about repositioning of the mediation procedure and proposing changes in the position (repositioning) of the mediation process and reaffirming the roles, duties and accountability of professional mediators or non-judge mediators so that it is expected that the role of non-judge mediators can active in resolving Islamic banking disputes both in procedures in the court or outside the courts applied at the Indonesian Religious Court. The contribution of this paper will be the revision of the curriculum of legal studies and Islamic Economic Law. The importance for researchers of the study is to develop and improve the capability of researchers for developing the law study program called Islamic Economic Law.

Modulating Cu+ distribution on the surface of Ce-doped CuO composite oxides for SO2-resistant NH3-selective catalytic reduction of NO

Ce dopping in CuO crystalline led to the distinguished existence and modulated distribution of Cu+ on the surface of samples, which was responsible for the outstanding SO2-resistant NH3-SCR-NO performance.

Experimental Study and Mathematical Modeling of Propane-SCR-NOx Using Group Method of Data Handling and Artificial Neural Network

In this study, the catalytic behavior of protonated clinoptilolite in propane-SCR-NOx was investigated. The experiments were carried out in the temperature range of 200–500 °C as a function of zeolite mesh size 20, 35 and 70 at different weights of zeolite (0.45–1 g) and flow rates (300–600 ml/min) and consequently at various gas hourly space velocities (GHSV). Group method of data handling (GMDH) and artificial neural network (ANN) system were applied for mathematical modeling of NOx conversion to N2 in propane-SCR-NOx. The operating temperature (T), volumetric flow rate (F) and the weight of clinoptilolite zeolite (W) and the conversion of NOx to N2 (X) were considered as the inputs and output, respectively. In order to evaluate the models performance, conversions of NOx obtained from the GMDH and ANN systems were compared with those obtained from the experimental method. It is concluded that the ANN could successively estimate the conversion and the results were in a good agreement with the experimental data.