Refinery hydrogen management for clean fuels production

A rigorous targeting algorithm for resource allocation networks

“…The minimum fuel flow rate target comes out to be 32.86 MMscfd and the corresponding pinch quality is 0.15 (i.e., 85% hydrogen purity). The minimum hydrogen requirement target comes out to be 182.86 MMscfd, which agrees with the result obtained by Alves (1999) and Hallale and Liu (2001) using the surplus diagram. It may be noted that the methodology based on surplus diagram is graphical and iterative in nature.…”

“…Pinch analysis, which began as a thermodynamic-based approach to energy conservation (Linnhoff et al, 1982), has evolved over the years to become a powerful tool for process integration and resource optimization (Linnhoff, 1993;Shenoy, 1995;Smith, 1995). Pinch analysis has been fruitfully used in analyzing heat exchanger networks (Shenoy, 1995), utility systems (Hall et al, 1992;Shenoy et al, 1998), integration of fired heaters Bandyopadhyay, 2005, 2007), mass exchanger networks (El-Halwagi and Manousiouthakis, 1989;Fraser, 1998, 2000a,b), water networks (Wang and Smith, 1994;Prakash and Shenoy, 2005;Bandyopadhyay et al, 2006), cooling water system (Kim and Smith, 2001), hydrogen management (Alves, 1999;Hallale and Liu, 2001;Hallale et al, 2002), material reuse networks (Shelley and El-Halwagi, 2000;El-Halwagi et al, 2004;Qin et al, 2005;Kazantzi and El-Halwagi, 2005;Foo et al, 2006), distillation column (Bandyopadhyay et al, 1999(Bandyopadhyay et al, , 2003(Bandyopadhyay et al, , 2004Bandyopadhyay, 2002Bandyopadhyay, , 2007Deshmukh et al, 2005), production planning (Singhvi and Shenoy, 2002;Singhvi et al, 2004), batch processes (Foo et al, 2004(Foo et al, , 2005, renewable energy systems (Kulkarni et al, 2007;Arun et al, 2006), etc. Recently, Bandyopadhyay et al (2006) have introduced a source composite curve-based approach for simultaneously targeting distributed effluent treatment system and th...…”

Process integration, modelling and optimisation for energy saving and pollution reduction

“…These instruments allow engineers to find the system Hydrogen pinch and set targets for hydrogen recovery, production and import by a refinery. This methodology has been improved by Hallale and Liu [12] accounting for pressure as a factor and, therefore, making the best use of the existing compressors in the refinery. This improved method can also account for important costs and tradeoffs including hydrogen production, compressors, fuel, and piping costs.…”

Virtual Sector Profiles for Innovation Sharing in Process Industry – Sector 01: Chemicals

“…Materials flowing in a network within a site can be defined at each point by their pressure, temperature, quality and flowrate such that the utility system is defined to provide these specifications (e.g. water network [11], hydrogen network [12]), they can be cascaded between process units or accessed at various points throughout the connected nodes. Material feed and product flows are defined similarly, though they are typically used in fewer points throughout the plant and are immediately transformed.…”