Quantum Sensor Lithium Detection in Brine NMR
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Solution Overview
Problem
Current NMR devices face challenges in detecting lithium due to its low concentration in underground brines and long spin-lattice relaxation times, making it impractical for efficient resource assessment and economic recovery of lithium-containing minerals.
Innovation Solution
The use of quantum sensors and a relaxation time enhancing substance in NMR sensing devices to reduce T1 times and improve the sensitivity of lithium detection, allowing for more effective identification and quantification of lithium in wellbore fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional NMR sensors are used to detect lithium in underground brines, then the measurement can be performed, but the detection sensitivity is insufficient due to low lithium concentration and long spin-lattice relaxation times
Solution Approach 1:
The patent applies parameter changes by transitioning from conventional NMR sensors to quantum sensors (such as NV centers in diamond), which fundamentally change the detection mechanism and sensitivity parameters. This enables detection of lithium at low concentrations in brines by exploiting quantum mechanical properties rather than classical magnetic resonance, directly resolving the contradiction between low lithium concentration and sufficient detection sensitivity
Solution Approach 2:
The patent replaces the conventional mechanical/electromagnetic NMR sensing system with a quantum sensing system based on nitrogen vacancy centers in diamond. This substitution enables detection of lithium nuclear spins through quantum mechanical effects, achieving the required measurement precision for low-concentration lithium detection that conventional systems cannot provide
2Productivity
If conventional NMR sensing is used, then the system operation is simple, but the spin-lattice relaxation times are very long making resource assessment impractical
Solution Approach 1:
The patent changes the fundamental detection parameter from conventional NMR to quantum sensing, which dramatically reduces the effective measurement time. Quantum sensors can detect lithium signals much faster than conventional NMR, transforming the impractically long relaxation times into manageable measurement durations and enabling efficient resource assessment
Solution Approach 2:
By replacing conventional NMR methodology with quantum sensing technology, the patent substitutes a slow, relaxation-dependent measurement process with a faster quantum detection mechanism. This substitution eliminates the bottleneck imposed by long spin-lattice relaxation times, directly improving resource assessment efficiency
3Measurement precision
If quantum sensors are used to improve lithium detection sensitivity, then measurement precision increases, but device complexity increases
Solution Approach 1:
The patent applies universality by designing quantum sensor systems that can detect multiple nuclear species (hydrogen, lithium, sodium, etc.) using the same fundamental quantum sensing mechanism. This multi-functionality justifies the increased device complexity by providing enhanced precision across multiple detection applications, not just lithium detection
Solution Approach 2:
The patent uses diamond with nitrogen vacancy centers as an intermediary medium that translates weak nuclear magnetic signals into detectable quantum optical or microwave signals. This intermediary approach manages device complexity by providing a robust interface between the quantum sensor and conventional electronics, making the complex quantum system practically implementable
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the accuracy and efficiency of lithium detection, making it feasible for practical applications in lithium production and resource assessment, while also improving the overall operation of NMR devices.
Implementation Method 1
sensing elements that include nitrogen vacancy (NV) centers in diamond that sense an electromagnetic signal generated by a transmission coil of the NMR device
Implementation Method 2
an inductive element that transmits an electromagnetic (EM) pulse sequence toward the sensitive volume to stimulate emission of a plurality of nuclear magnetic resonance (NMR) signals from the nuclei of the sensitive volume
Implementation Method 3
one or more magnets that provide a magnetic field that polarizes nuclei of a sensitive volume
Data Source
AI summary
Described herein are systems and techniques for improving an accuracy of determinations made using data sensed in a wellbore or in a laboratory. Nuclear magnetic resonance (NMR) sensing devices may be used to collect data in a wellbore or lab. NMR sensing devices include a magnet (e.g., a permanent magnet or electromagnet) that provides a magnetic field that aligns the spins of protons/nuclei in substances near the NMR sensing device. The magnetic field strength provided by the magnet of the NMR sensing device affects the sensitivity of the NMR sensing device and affects frequencies that the NMR sensing device effectively uses when the NMR sensing device operates. Systems and techniques of the present disclosure may measure concentrations of lithium in brine deposits when identifying particular brine deposits that include sufficient lithium concentrations to justify extracting lithium from those particular brine deposits.