Hydrocarbon Processing - May 2022 - 78
Sustainability
R&PC plant planning
(days - months)
R&PC plant scheduling and optimization
(minutes - days)
Process unit optimization
number of variables requires integration of sophisticated and
advanced tools. Industry 4.0 developed data and information
from various sources and levels that can be integrated into
methods and systems for adaptive and effective decision-making
must be further analyzed to manage the various and conflicting
decision variables.
AI solutions may play an essential role in achieving sustainProcess
unit control
FIG. 3. Planning and scheduling of AI dynamic optimization package
based on the neural network model.
proved an €88-MM grant to Neste's green hydrogen and CO2
capture and storage (CCS) project. This project aims to reduce
GHG emissions quickly and efficiently at the Porvoo refinery
in Finland. This transformation project will enable the Porvoo
refinery to significantly decrease CO2
emissions by approximately
4 MMtpy. The reduction in emissions will be achieved
through CCS by electrolysis solutions, enabling the decarbonization
of production at the refinery.
Increased efficiency. To maintain sustainable profitability,
petroleum and petrochemical industries must quickly respond
to changing market conditions by switching from producing
one product to another. The raw material for gasoline production
may be redirected to petrochemicals feedstock production
that gains a higher price, and back again when prices fall.
Production efficiency-the capital value of industrial production-is
defined by how efficiently it uses critical resources to
capture growth. The efficiency measurement is defined by how
effectively a refinery uses:
* Level of emissions
* Produced water
* Carbon and the components of hydrocarbons
* Hydrogen
* Utilities.
These efficiencies are balanced by the refinery's overall
business strategies, which may help determine the effective use
of capital value. Utility efficiency represents how effectively the
energy is used to operate the refinery. For example, the efficiency
of water-used to regulate temperatures in the refinery-is
considered a critical factor because it is almost always scarce
and requires many resources for its operation and cleaning.
Due to sustainability efforts and increased complexity, refineries
are facing the challenge of increased volume data and
material flowover the processing and distribution. The advent
of the Industry 4.0 initiative and modern artificial intelligence
(AI) with machine-learning tools open new horizons towards
industrial digitalization by enabling automated procedures and
communication by means that were previously unavailable.
The technology seen in the context of Industry 4.0 aims to reduce
the complexity of these systems. Efficient management
of the substantial amounts of generated data and increased
78 MAY 2022 | HydrocarbonProcessing.com
able development for sustainable production, pollution control,
water efficiency, industrial safety, clean air and healthcare.
These advanced digital application solutions integrate realtime
data and advanced analytics for better decision-making,
underpinning applications that can dramatically improve process
control behavior, efficiency and sustainability.1-6
Modcon-AI solution. Corrective actions based on AI technology
can improve operational reliability, increase process
optimization, optimize energy consumption, reduce waste and
emissions and improve water utilization. Enhancing the capabilities
of plant operators can close the gaps related to operation
experience caused by personnel attrition.
Big data analysis functionality includes multidimensional
fusion and distribution of incoming data, abnormality of novel
events detection, clustering, decision trees, linear, polynomial,
logistic regression and escalation of real-time novelty analysis
using deep learning technologies.
Investment in AI and machine-learning techniques enable
the sustainable development of the modern petroleum and
petrochemical integrated industry by adopting business strategies
and developing artificial solutions that meet the needs of
the enterprise, while protecting, sustaining and enhancing the
human and natural resources needed in the future.
LITERATURE CITED
1
2
Shahnovsky, G., A. Kigel and R. McMurray, " Predictive ethylene production, "
Hydrocarbon Engineering, February 2019.
da Silva, M. W., " Achieving competitive advantage in the downstream market-
Petrochemical integration and crude oil refining economy, " July 2020, online:
https://www.linkedin.com/pulse/achieving-competitive-advantage-downstreammarket-oil-da-silva-mba
3
Mourtzis,
D., N. Papakostas and S. Makris, " Complexity in Industry
4.0
systems
and
networks, "
2019,
online:
https://www.hindawi.com/
journals/complexity/2019/7817046/?utm_source=google&utm_
medium=cpc&utm_campaign=HDW_MRKT_GBL_SUB_ADWO_
PAI_DYNA_JOUR_Complex it y_X0000_Geot a r g et&gcl id=
EAIaIQobChMIwuuFzeme9wIVfcLCBB171AvMEAAYASAAEgJTtvD_BwE
4
5
Shahnovsky, G., A. Kigel and G. Briskman, " The evolution of process optimization, "
Hydrocarbon Engineering, April 2022.
Hasheminasab, H., Y. Gholipour, M. Kharrazi and D. Streimikiene, " A novel metric
of sustainability for petroleum refinery projects, " Journal of Cleaner Production,
January 2018.
6
Belli, L., L. Davoli, A. Medioli, P. L. Marchini and G. Ferrari, " Toward Industry 4.0
with IoT: Optimizing business processes in an evolving manufacturing factory, "
Technology report, August 2019.
ARIEL KIGEL holds a PhD in physical chemistry and an MBA in
business administration. He leads market-oriented development
and daily operations of online process analytical systems for
conventional industry. Dr. Kigel leads the definition and
development of new applications into new industries,
overseeing multi-national teams.
GADI BRISKMAN holds an ME degree in systems engineering
and a BSc degree in electric engineering. Mr. Bricksman has
several years of experience with computer vision, robotics,
deep learning and process optimization.
https://www.linkedin.com/pulse/achieving-competitive-advantage-downstream-market-oil-da-silva-mba
https://www.linkedin.com/pulse/achieving-competitive-advantage-downstream-market-oil-da-silva-mba
https://www.hindawi.com/journals/complexity/2019/7817046/?utm_source=google&utm_medium=cpc&utm_campaign=HDW_MRKT_GBL_SUB_ADWO_PAI_DYNA_JOUR_Complexity_X0000_Geotarget&gclid=EAIaIQobChMIwuuFzeme9wIVfcLCBB171AvMEAAYASAAEgJTtvD_BwE
https://www.hindawi.com/journals/complexity/2019/7817046/?utm_source=google&utm_medium=cpc&utm_campaign=HDW_MRKT_GBL_SUB_ADWO_PAI_DYNA_JOUR_Complexity_X0000_Geotarget&gclid=EAIaIQobChMIwuuFzeme9wIVfcLCBB171AvMEAAYASAAEgJTtvD_BwE
https://www.hindawi.com/journals/complexity/2019/7817046/?utm_source=google&utm_medium=cpc&utm_campaign=HDW_MRKT_GBL_SUB_ADWO_PAI_DYNA_JOUR_Complexity_X0000_Geotarget&gclid=EAIaIQobChMIwuuFzeme9wIVfcLCBB171AvMEAAYASAAEgJTtvD_BwE
https://www.hindawi.com/journals/complexity/2019/7817046/?utm_source=google&utm_medium=cpc&utm_campaign=HDW_MRKT_GBL_SUB_ADWO_PAI_DYNA_JOUR_Complexity_X0000_Geotarget&gclid=EAIaIQobChMIwuuFzeme9wIVfcLCBB171AvMEAAYASAAEgJTtvD_BwE
https://www.hindawi.com/journals/complexity/2019/7817046/?utm_source=google&utm_medium=cpc&utm_campaign=HDW_MRKT_GBL_SUB_ADWO_PAI_DYNA_JOUR_Complexity_X0000_Geotarget&gclid=EAIaIQobChMIwuuFzeme9wIVfcLCBB171AvMEAAYASAAEgJTtvD_BwE
http://www.HydrocarbonProcessing.com
Hydrocarbon Processing - May 2022
Table of Contents for the Digital Edition of Hydrocarbon Processing - May 2022
Contents
Hydrocarbon Processing - May 2022 - Cover1
Hydrocarbon Processing - May 2022 - Cover2
Hydrocarbon Processing - May 2022 - Contents
Hydrocarbon Processing - May 2022 - 4
Hydrocarbon Processing - May 2022 - 5
Hydrocarbon Processing - May 2022 - 6
Hydrocarbon Processing - May 2022 - 7
Hydrocarbon Processing - May 2022 - 8
Hydrocarbon Processing - May 2022 - 9
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Hydrocarbon Processing - May 2022 - Cover3
Hydrocarbon Processing - May 2022 - Cover4
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https://www.nxtbook.com/nxtbooks/gulfpub/hp_200910
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200909
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200908
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200907
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200906
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200905
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200904
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200903
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200902
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200901
https://www.nxtbookmedia.com